{"title":"Standard Panel Radiators","description":"","products":[{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S304K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e209 W (714 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 3.44 kg and it holds 0.68 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 400 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e209 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e714 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 209 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3.44 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 0.68 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 209 W on a 70 °C mean water temperature, or 268 W where the system runs at 80 °C. Straight swap for a tired 300 × 400 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 209 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 108 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S304K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e209 W (714 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e268 W (914 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 400 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.44 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e0.68 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 400 mm gives 420 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002898866512,"sku":"S304K","price":15.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-400mm-4621001.jpg?v=1779099978"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D304K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e420 W (1432 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e420 W against 209 W\u003c\/strong\u003e for a Type 11 the same size. Nett weight is 6.96 kg and it holds 1.28 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 400 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e420 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1432 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 420 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e6.96 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.28 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 420 W on a 70 °C mean water temperature, or 538 W where the system runs at 80 °C. Straight swap for a tired 300 × 400 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 420 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 216 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D304K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e420 W (1432 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e538 W (1834 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 400 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e6.96 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.28 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 209 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002898899280,"sku":"D304K","price":30.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-400mm-4650312.jpg?v=1779099975"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-500mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 500mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S305K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 500 mm\u003c\/strong\u003e, giving \u003cstrong\u003e262 W (892 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 4.3 kg and it holds 0.85 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 500 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e262 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e892 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 262 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4.3 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 0.85 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 262 W on a 70 °C mean water temperature, or 335 W where the system runs at 80 °C. Straight swap for a tired 300 × 500 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 262 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 135 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S305K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e262 W (892 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e335 W (1143 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 500 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.3 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e0.85 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002898932048,"sku":"S305K","price":18.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-500mm-2104167.jpg?v=1779099921"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-600mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 600mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S306K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 600 mm\u003c\/strong\u003e, giving \u003cstrong\u003e314 W (1071 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 5.16 kg and it holds 1.02 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 600 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e314 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1071 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 314 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e5.16 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.02 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 314 W on a 70 °C mean water temperature, or 402 W where the system runs at 80 °C. Straight swap for a tired 300 × 600 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 314 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 162 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S306K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e314 W (1071 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e402 W (1372 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 600 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e5.16 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.02 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 600 mm gives 629 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-600mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002898964816,"sku":"S306K","price":22.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-600mm-3302947.jpg?v=1779099921"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-600mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 600mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D306K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 600 mm\u003c\/strong\u003e, giving \u003cstrong\u003e629 W (2148 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e629 W against 314 W\u003c\/strong\u003e for a Type 11 the same size. Nett weight is 10.44 kg and it holds 1.92 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 600 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e629 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2148 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 629 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10.44 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.92 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 629 W on a 70 °C mean water temperature, or 806 W where the system runs at 80 °C. Straight swap for a tired 300 × 600 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 629 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 324 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D306K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e629 W (2148 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e806 W (2752 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 600 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10.44 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.92 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 314 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-600mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002898997584,"sku":"D306K","price":45.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-600mm-9953254.jpg?v=1779099920"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-800mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 800mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S308K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 800 mm\u003c\/strong\u003e, giving \u003cstrong\u003e366 W (1249 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 6.88 kg and it holds 1.36 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 800 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e366 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1249 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 366 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e6.88 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.36 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 366 W on a 70 °C mean water temperature, or 469 W where the system runs at 80 °C. Straight swap for a tired 300 × 800 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 366 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 188 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S308K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e366 W (1249 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e469 W (1600 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 800 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e6.88 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.36 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 800 mm gives 839 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-800mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899292496,"sku":"S308K","price":26.43,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-800mm-8674824.jpg?v=1779099920"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-800mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 800mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D308K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 800 mm\u003c\/strong\u003e, giving \u003cstrong\u003e839 W (2864 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e839 W against 366 W\u003c\/strong\u003e for a Type 11 the same size. Nett weight is 13.92 kg and it holds 2.56 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 800 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e839 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2864 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 839 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e13.92 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.56 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 839 W on a 70 °C mean water temperature, or 1075 W where the system runs at 80 °C. Straight swap for a tired 300 × 800 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 839 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 432 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D308K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e839 W (2864 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1075 W (3669 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 800 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e13.92 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.56 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 366 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-800mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899325264,"sku":"D308K","price":60.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-800mm-7105078.jpg?v=1780578091"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1000mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 1000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S310K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 1000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e523 W (1784 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 8.6 kg and it holds 1.7 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1000 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e523 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1784 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 523 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e8.6 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.7 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 523 W on a 70 °C mean water temperature, or 670 W where the system runs at 80 °C. Straight swap for a tired 300 × 1000 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 523 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 269 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S310K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e523 W (1784 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e670 W (2286 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1000 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e8.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.7 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 1000 mm gives 1049 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899358032,"sku":"S310K","price":37.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1000mm-9173678.jpg?v=1779099920"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1000mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 1000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D310K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 1000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1049 W (3580 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1049 W against 523 W\u003c\/strong\u003e for a Type 11 the same size. Nett weight is 17.4 kg and it holds 3.2 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1000 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1049 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3580 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1049 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e17.4 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 3.2 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1049 W on a 70 °C mean water temperature, or 1344 W where the system runs at 80 °C. Straight swap for a tired 300 × 1000 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1049 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 540 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D310K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1049 W (3580 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1344 W (4586 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1000 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e17.4 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.2 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 523 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899390800,"sku":"D310K","price":75.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1000mm-1760166.jpg?v=1779099919"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1200mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 1200mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S312K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 1200 mm\u003c\/strong\u003e, giving \u003cstrong\u003e628 W (2141 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 10.32 kg and it holds 2.04 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1200 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e628 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2141 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 628 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10.32 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.04 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 628 W on a 70 °C mean water temperature, or 804 W where the system runs at 80 °C. Straight swap for a tired 300 × 1200 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 628 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 323 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S312K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e628 W (2141 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e804 W (2743 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1200 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10.32 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.04 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 1200 mm gives 1259 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1200mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899423568,"sku":"S312K","price":45.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1200mm-6941952.jpg?v=1779099920"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1200mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 1200mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D312K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 1200 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1259 W (4296 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1259 W against 628 W\u003c\/strong\u003e for a Type 11 the same size. Nett weight is 20.88 kg and it holds 3.84 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1200 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1259 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4296 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1259 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e20.88 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 3.84 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1259 W on a 70 °C mean water temperature, or 1613 W where the system runs at 80 °C. Straight swap for a tired 300 × 1200 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1259 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 648 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D312K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1259 W (4296 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1613 W (5503 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1200 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e20.88 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.84 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 628 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1200mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899587408,"sku":"D312K","price":90.91,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1200mm-9088195.jpg?v=1779099918"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1400mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 1400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S314K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 1400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e732 W (2498 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 12.04 kg and it holds 2.38 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1400 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e732 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2498 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 732 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e12.04 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.38 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 732 W on a 70 °C mean water temperature, or 938 W where the system runs at 80 °C. Straight swap for a tired 300 × 1400 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 732 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 377 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S314K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e732 W (2498 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e938 W (3201 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1400 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e12.04 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.38 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 1400 mm gives 1469 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899620176,"sku":"S314K","price":52.87,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1400mm-6684568.jpg?v=1779099919"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1400mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 1400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D314K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 1400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1469 W (5012 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1469 W against 732 W\u003c\/strong\u003e for a Type 11 the same size. Nett weight is 24.36 kg and it holds 4.48 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1400 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1469 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e5012 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1469 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e24.36 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.48 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1469 W on a 70 °C mean water temperature, or 1882 W where the system runs at 80 °C. Straight swap for a tired 300 × 1400 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1469 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 757 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D314K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1469 W (5012 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1882 W (6420 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1400 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e24.36 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.48 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 732 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899652944,"sku":"D314K","price":106.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1400mm-4749021.jpg?v=1779099918"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1600mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 1600mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S316K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 1600 mm\u003c\/strong\u003e, giving \u003cstrong\u003e837 W (2855 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 13.76 kg and it holds 2.72 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1600 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e837 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2855 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 837 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e13.76 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.72 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 837 W on a 70 °C mean water temperature, or 1072 W where the system runs at 80 °C. Straight swap for a tired 300 × 1600 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 837 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 431 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S316K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e837 W (2855 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1072 W (3658 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1600 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e13.76 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.72 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 1600 mm gives 1679 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1600mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899685712,"sku":"S316K","price":60.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1600mm-3190572.jpg?v=1779099918"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1600mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 1600mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D316K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 1600 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1679 W (5727 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1679 W against 837 W\u003c\/strong\u003e for a Type 11 the same size. Nett weight is 27.84 kg and it holds 5.12 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 1600 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1679 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e5727 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1679 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e27.84 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 5.12 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1679 W on a 70 °C mean water temperature, or 2150 W where the system runs at 80 °C. Straight swap for a tired 300 × 1600 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1679 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 865 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D316K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1679 W (5727 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2150 W (7337 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 1600 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e27.84 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e5.12 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 837 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-1600mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899718480,"sku":"D316K","price":121.21,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-1600mm-3865656.jpg?v=1779099917"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-2000mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 300mm x 2000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S320K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 300 × 2000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1046 W (3569 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. At 2000 mm wide it is a long radiator — check the run of clear wall before ordering.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 2000 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1046 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3569 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1046 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e17.2 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 3.4 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1046 W on a 70 °C mean water temperature, or 1340 W where the system runs at 80 °C. Straight swap for a tired 300 × 2000 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 300 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1046 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 539 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S320K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1046 W (3569 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1340 W (4572 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 2000 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e17.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.4 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 300 × 2000 mm gives 2098 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-2000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899751248,"sku":"S320K","price":75.53,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-2000mm-2759341.jpg?v=1779099918"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-2000mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 300mm x 2000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D320K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 300 × 2000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e2098 W (7159 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e2098 W against 1046 W\u003c\/strong\u003e for a Type 11 the same size. At 2000 mm wide it is a long radiator — check the run of clear wall before ordering.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e300 × 2000 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e2098 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e7159 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 2098 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e34.8 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 6.4 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 300 mm high it tucks under low sills and full-height glazing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 2098 W on a 70 °C mean water temperature, or 2688 W where the system runs at 80 °C. Straight swap for a tired 300 × 2000 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 245 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 300 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 2098 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 1080 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D320K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2098 W (7159 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2688 W (9172 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e300 × 2000 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e245 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e34.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e6.4 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 1046 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-300mm-x-2000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899784016,"sku":"D320K","price":151.52,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-300mm-x-2000mm-6865006.jpg?v=1779099918"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-400mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S404K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e270 W (921 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 4.6 kg and it holds 0.84 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 400 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e270 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e921 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 270 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4.6 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 0.84 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 270 W on a 70 °C mean water temperature, or 346 W where the system runs at 80 °C. Straight swap for a tired 400 × 400 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 270 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 139 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S404K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e270 W (921 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e346 W (1180 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 400 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.6 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e0.84 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 400 mm gives 533 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 413 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-400\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899816784,"sku":"S404K","price":19.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-400mm-7592180.jpg?v=1779099918"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-400","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P404K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e413 W (1408 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e413 W against 270 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 7.88 kg and it holds 1.64 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 400 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e413 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1408 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 413 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e7.88 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.64 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 413 W on a 70 °C mean water temperature, or 529 W where the system runs at 80 °C. Straight swap for a tired 400 × 400 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 413 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 213 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P404K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e413 W (1408 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e529 W (1803 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 400 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e7.88 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.64 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 400 mm gives 533 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 270 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899849552,"sku":"P404K","price":29.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-400mm-2492147.jpg?v=1786621155"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-400mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D404K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e533 W (1819 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e533 W against 413 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 9.16 kg and it holds 1.64 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 400 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e533 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1819 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 533 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e9.16 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.64 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 533 W on a 70 °C mean water temperature, or 683 W where the system runs at 80 °C. Straight swap for a tired 400 × 400 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 533 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 274 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D404K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e533 W (1819 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e683 W (2330 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 400 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e9.16 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.64 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 413 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-400\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899882320,"sku":"D404K","price":38.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-400mm-3589899.jpg?v=1779099916"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-500mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 500mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S405K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 500 mm\u003c\/strong\u003e, giving \u003cstrong\u003e337 W (1151 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 5.75 kg and it holds 1.05 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 500 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e337 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1151 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 337 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e5.75 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.05 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 337 W on a 70 °C mean water temperature, or 432 W where the system runs at 80 °C. Straight swap for a tired 400 × 500 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 337 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 174 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S405K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e337 W (1151 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e432 W (1475 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 500 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e5.75 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.05 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 500 mm gives 666 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-500mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 516 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-500\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899915088,"sku":"S405K","price":24.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-500mm-5693866.jpg?v=1779099917"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-500","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 500mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P405K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 500 mm\u003c\/strong\u003e, giving \u003cstrong\u003e516 W (1759 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e516 W against 337 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 9.85 kg and it holds 2.05 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 500 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e516 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1759 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 516 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e9.85 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.05 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 516 W on a 70 °C mean water temperature, or 661 W where the system runs at 80 °C. Straight swap for a tired 400 × 500 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 516 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 266 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P405K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e516 W (1759 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e661 W (2254 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 500 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e9.85 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.05 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 500 mm gives 666 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-500mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 337 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-500mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899947856,"sku":"P405K","price":37.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-500mm-9389216.jpg?v=1786621156"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-500mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 500mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D405K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 500 mm\u003c\/strong\u003e, giving \u003cstrong\u003e666 W (2273 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e666 W against 516 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 11.45 kg and it holds 2.05 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 500 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e666 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2273 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 666 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e11.45 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.05 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 666 W on a 70 °C mean water temperature, or 854 W where the system runs at 80 °C. Straight swap for a tired 400 × 500 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 666 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 343 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D405K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e666 W (2273 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e854 W (2912 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 500 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e11.45 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.05 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 516 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-500\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002899980624,"sku":"D405K","price":48.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-500mm-4241814.jpg?v=1779099916"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-600mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 600mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S406K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 600 mm\u003c\/strong\u003e, giving \u003cstrong\u003e405 W (1381 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 6.9 kg and it holds 1.26 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 600 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e405 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1381 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 405 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e6.9 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.26 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 405 W on a 70 °C mean water temperature, or 519 W where the system runs at 80 °C. Straight swap for a tired 400 × 600 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 405 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 209 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S406K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e405 W (1381 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e519 W (1769 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 600 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e6.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.26 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 600 mm gives 800 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-600mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 619 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-600\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900013392,"sku":"S406K","price":29.23,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-600mm-3163003.jpg?v=1779099917"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-600","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 600mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P406K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 600 mm\u003c\/strong\u003e, giving \u003cstrong\u003e619 W (2111 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e619 W against 405 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 11.82 kg and it holds 2.46 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 600 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e619 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2111 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 619 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e11.82 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.46 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 619 W on a 70 °C mean water temperature, or 793 W where the system runs at 80 °C. Straight swap for a tired 400 × 600 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 619 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 319 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P406K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e619 W (2111 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e793 W (2705 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 600 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e11.82 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.46 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 600 mm gives 800 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-600mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 405 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-600mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900046160,"sku":"P406K","price":44.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-600mm-4087366.jpg?v=1786621156"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-600mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 600mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D406K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 600 mm\u003c\/strong\u003e, giving \u003cstrong\u003e800 W (2728 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e800 W against 619 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 13.74 kg and it holds 2.46 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 600 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e800 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2728 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 800 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e13.74 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.46 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 800 W on a 70 °C mean water temperature, or 1024 W where the system runs at 80 °C. Straight swap for a tired 400 × 600 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 800 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 412 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D406K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e800 W (2728 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1024 W (3495 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 600 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e13.74 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.46 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 619 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-600\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900078928,"sku":"D406K","price":57.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-600mm-1066962.jpg?v=1779099916"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-700mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 700mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S407K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 700 mm\u003c\/strong\u003e, giving \u003cstrong\u003e472 W (1611 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 8.05 kg and it holds 1.47 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 700 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e472 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1611 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 472 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e8.05 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.47 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 472 W on a 70 °C mean water temperature, or 605 W where the system runs at 80 °C. Straight swap for a tired 400 × 700 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 472 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 243 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S407K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e472 W (1611 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e605 W (2064 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 700 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e8.05 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.47 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 700 mm gives 933 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-700mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 722 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-700\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900144464,"sku":"S407K","price":34.11,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-700mm-5701692.jpg?v=1779099915"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-700","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 700mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P407K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 700 mm\u003c\/strong\u003e, giving \u003cstrong\u003e722 W (2463 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e722 W against 472 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 13.79 kg and it holds 2.87 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 700 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e722 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2463 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 722 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e13.79 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.87 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 722 W on a 70 °C mean water temperature, or 925 W where the system runs at 80 °C. Straight swap for a tired 400 × 700 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 722 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 372 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P407K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e722 W (2463 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e925 W (3156 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 700 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e13.79 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.87 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 700 mm gives 933 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-700mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 472 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-700mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900177232,"sku":"P407K","price":52.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-700mm-2658525.jpg?v=1786621154"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-700mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 700mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D407K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 700 mm\u003c\/strong\u003e, giving \u003cstrong\u003e933 W (3183 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e933 W against 722 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 16.03 kg and it holds 2.87 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 700 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e933 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3183 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 933 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e16.03 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.87 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 933 W on a 70 °C mean water temperature, or 1195 W where the system runs at 80 °C. Straight swap for a tired 400 × 700 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 933 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 480 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D407K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e933 W (3183 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1195 W (4077 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 700 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e16.03 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.87 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 722 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-700\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900210000,"sku":"D407K","price":67.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-700mm-9938703.jpg?v=1779099915"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-800mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 800mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S408K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 800 mm\u003c\/strong\u003e, giving \u003cstrong\u003e540 W (1842 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 9.2 kg and it holds 1.68 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 800 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e540 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e1842 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 540 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e9.2 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.68 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 540 W on a 70 °C mean water temperature, or 691 W where the system runs at 80 °C. Straight swap for a tired 400 × 800 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 540 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 278 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S408K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e540 W (1842 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e691 W (2359 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 800 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e9.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.68 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 800 mm gives 1066 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-800mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 825 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-800\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900242768,"sku":"S408K","price":38.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-800mm-5698906.jpg?v=1779099915"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-800","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 800mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P408K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 800 mm\u003c\/strong\u003e, giving \u003cstrong\u003e825 W (2815 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e825 W against 540 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 15.76 kg and it holds 3.28 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 800 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e825 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2815 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 825 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e15.76 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 3.28 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 825 W on a 70 °C mean water temperature, or 1057 W where the system runs at 80 °C. Straight swap for a tired 400 × 800 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 825 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 425 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P408K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e825 W (2815 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1057 W (3607 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 800 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e15.76 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.28 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 800 mm gives 1066 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-800mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 540 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-800mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900275536,"sku":"P408K","price":59.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-800mm-9015113.jpg?v=1786621155"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-800mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 800mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D408K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 800 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1066 W (3637 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1066 W against 825 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 18.32 kg and it holds 3.28 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 800 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1066 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3637 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1066 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e18.32 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 3.28 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1066 W on a 70 °C mean water temperature, or 1366 W where the system runs at 80 °C. Straight swap for a tired 400 × 800 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1066 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 549 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D408K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1066 W (3637 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1366 W (4660 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 800 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e18.32 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.28 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 33 at the same 400 × 800 mm gives 1453 W at ΔT50, in a 160 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400-x-800\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 33\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 825 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-800\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900308304,"sku":"D408K","price":76.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-800mm-4785965.jpg?v=1779099914"},{"product_id":"kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400-x-800","title":"Kartell K-Rad Type 33 Triple Panel Triple Convector Radiator 400mm x 800mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact T408K is a \u003cstrong\u003eType 33 triple panel, triple convector radiator, 400 × 800 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1453 W (4957 BTU\/h) at ΔT50\u003c\/strong\u003e. Three panels and three banks of convector fins in a 160 mm case: \u003cstrong\u003e1453 W against 1066 W\u003c\/strong\u003e for a Type 22 the same size — the highest output per width Kartell make. Nett weight is 25.36 kg and it holds 4.88 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 33 triple panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 800 × 160 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1453 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4957 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1453 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e25.36 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.88 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1453 W on a 70 °C mean water temperature, or 1839 W where the system runs at 80 °C. The pick where a slimmer panel the same width cannot reach the load.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 160 mm against 105 mm for a Type 22 — check the projection suits the room.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1453 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 748 W from this radiator. This is already the deepest, highest-output panel in the range at this size — if it still falls short, go wider or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact T408K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 33 — triple panel, triple convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1453 W (4957 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1839 W (6275 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 800 × 160 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e25.36 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.88 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eSlimmer option?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 800 mm gives 1066 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-800mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 33 runs 400–750 mm high in widths up to 2000 mm, from 1006 W to 5028 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900341072,"sku":"T408K","price":131.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400mm-x-800mm-9944972.jpg?v=1786621151"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-900mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 900mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S409K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 900 mm\u003c\/strong\u003e, giving \u003cstrong\u003e607 W (2072 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 10.35 kg and it holds 1.89 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 900 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e607 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2072 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 607 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10.35 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 1.89 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 607 W on a 70 °C mean water temperature, or 778 W where the system runs at 80 °C. Straight swap for a tired 400 × 900 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 607 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 313 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S409K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e607 W (2072 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e778 W (2654 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 900 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10.35 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1.89 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 900 mm gives 1199 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-900mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 928 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-900\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002900373840,"sku":"S409K","price":43.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-900mm-8656809.jpg?v=1779099915"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-900","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 900mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P409K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 900 mm\u003c\/strong\u003e, giving \u003cstrong\u003e928 W (3167 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e928 W against 607 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 17.73 kg and it holds 3.69 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 900 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e928 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3167 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 928 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e17.73 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 3.69 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 928 W on a 70 °C mean water temperature, or 1189 W where the system runs at 80 °C. Straight swap for a tired 400 × 900 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 928 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 478 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P409K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e928 W (3167 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1189 W (4057 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 900 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e17.73 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.69 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 900 mm gives 1199 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-900mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 607 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-900mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901225808,"sku":"P409K","price":67.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-900mm-5028293.jpg?v=1786621153"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-900mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 900mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D409K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 900 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1199 W (4092 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1199 W against 928 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 20.61 kg and it holds 3.69 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 900 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1199 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4092 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1199 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e20.61 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 3.69 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1199 W on a 70 °C mean water temperature, or 1536 W where the system runs at 80 °C. Straight swap for a tired 400 × 900 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1199 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 617 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D409K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1199 W (4092 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1536 W (5242 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 900 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e20.61 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e3.69 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 928 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-x-900\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901258576,"sku":"D409K","price":86.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-900mm-6196672.jpg?v=1779099914"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1000mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 1000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S410K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 1000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e675 W (2302 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 11.5 kg and it holds 2.1 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1000 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e675 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2302 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 675 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e11.5 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.1 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 675 W on a 70 °C mean water temperature, or 864 W where the system runs at 80 °C. Straight swap for a tired 400 × 1000 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 675 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 348 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S410K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e675 W (2302 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e864 W (2949 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1000 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e11.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.1 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1000 mm gives 1333 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 1031 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1000\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901291344,"sku":"S410K","price":48.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1000mm-5050863.jpg?v=1779099915"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1000","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 1000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P410K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 1000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1031 W (3519 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e1031 W against 675 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 19.7 kg and it holds 4.1 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1000 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1031 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3519 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1031 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e19.7 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.1 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1031 W on a 70 °C mean water temperature, or 1321 W where the system runs at 80 °C. Straight swap for a tired 400 × 1000 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1031 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 531 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P410K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1031 W (3519 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1321 W (4508 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1000 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e19.7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.1 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1000 mm gives 1333 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 675 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901324112,"sku":"P410K","price":74.47,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-1000mm-1497523.jpg?v=1786621153"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1000mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 1000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D410K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 1000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1333 W (4547 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1333 W against 1031 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 22.9 kg and it holds 4.1 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1000 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1333 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4547 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1333 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e22.9 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.1 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1333 W on a 70 °C mean water temperature, or 1707 W where the system runs at 80 °C. Straight swap for a tired 400 × 1000 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1333 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 686 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D410K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1333 W (4547 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1707 W (5825 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1000 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e22.9 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.1 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 33 at the same 400 × 1000 mm gives 1816 W at ΔT50, in a 160 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400-1000\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 33\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 1031 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1000\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901356880,"sku":"D410K","price":96.22,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1000mm-1352510.jpg?v=1779099914"},{"product_id":"kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400-1000","title":"Kartell K-Rad Type 33 Triple Panel Triple Convector Radiator 400mm x 1000mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact T410K is a \u003cstrong\u003eType 33 triple panel, triple convector radiator, 400 × 1000 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1816 W (6196 BTU\/h) at ΔT50\u003c\/strong\u003e. Three panels and three banks of convector fins in a 160 mm case: \u003cstrong\u003e1816 W against 1333 W\u003c\/strong\u003e for a Type 22 the same size — the highest output per width Kartell make. Nett weight is 31.7 kg and it holds 6.1 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 33 triple panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1000 × 160 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1816 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e6196 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1816 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e31.7 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 6.1 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1816 W on a 70 °C mean water temperature, or 2299 W where the system runs at 80 °C. The pick where a slimmer panel the same width cannot reach the load.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 160 mm against 105 mm for a Type 22 — check the projection suits the room.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1816 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 935 W from this radiator. This is already the deepest, highest-output panel in the range at this size — if it still falls short, go wider or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact T410K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 33 — triple panel, triple convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1816 W (6196 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2299 W (7844 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1000 × 160 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e31.7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e6.1 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eSlimmer option?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1000 mm gives 1333 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1000mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 33 runs 400–750 mm high in widths up to 2000 mm, from 1006 W to 5028 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901389648,"sku":"T410K","price":164.52,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400mm-x-1000mm-8202103.jpg?v=1786621151"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1100mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 1100mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S411K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 1100 mm\u003c\/strong\u003e, giving \u003cstrong\u003e742 W (2532 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 12.65 kg and it holds 2.31 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1100 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e742 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2532 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 742 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e12.65 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.31 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 742 W on a 70 °C mean water temperature, or 951 W where the system runs at 80 °C. Straight swap for a tired 400 × 1100 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 742 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 382 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S411K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e742 W (2532 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e951 W (3244 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1100 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e12.65 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.31 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1100 mm gives 1466 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1100mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 1134 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1100\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901422416,"sku":"S411K","price":53.59,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1100mm-3167266.jpg?v=1779099914"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1100","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 1100mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P411K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 1100 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1134 W (3871 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e1134 W against 742 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 21.67 kg and it holds 4.51 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1100 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1134 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3871 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1134 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e21.67 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.51 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1134 W on a 70 °C mean water temperature, or 1453 W where the system runs at 80 °C. Straight swap for a tired 400 × 1100 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1134 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 584 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P411K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1134 W (3871 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1453 W (4959 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1100 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e21.67 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.51 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1100 mm gives 1466 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1100mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 742 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1100mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901455184,"sku":"P411K","price":81.92,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-1100mm-2743800.jpg?v=1786621153"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1100mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 1100mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D411K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 1100 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1466 W (5002 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1466 W against 1134 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 25.19 kg and it holds 4.51 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1100 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1466 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e5002 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1466 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e25.19 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.51 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1466 W on a 70 °C mean water temperature, or 1878 W where the system runs at 80 °C. Straight swap for a tired 400 × 1100 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1466 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 755 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D411K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1466 W (5002 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1878 W (6407 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1100 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e25.19 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.51 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 1134 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1100\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901487952,"sku":"D411K","price":105.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1100mm-9052711.jpg?v=1779099914"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1200mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 1200mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S412K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 1200 mm\u003c\/strong\u003e, giving \u003cstrong\u003e810 W (2762 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 13.8 kg and it holds 2.52 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1200 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e810 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e2762 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 810 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e13.8 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.52 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 810 W on a 70 °C mean water temperature, or 1037 W where the system runs at 80 °C. Straight swap for a tired 400 × 1200 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 810 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 417 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S412K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e810 W (2762 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1037 W (3539 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1200 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e13.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.52 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1200 mm gives 1599 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1200mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 1238 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1200\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901520720,"sku":"S412K","price":58.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1200mm-2586803.jpg?v=1779099858"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1200","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 1200mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P412K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 1200 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1238 W (4223 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e1238 W against 810 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 23.64 kg and it holds 4.92 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1200 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1238 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4223 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1238 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e23.64 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.92 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1238 W on a 70 °C mean water temperature, or 1586 W where the system runs at 80 °C. Straight swap for a tired 400 × 1200 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1238 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 638 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P412K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1238 W (4223 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1586 W (5410 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1200 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e23.64 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.92 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1200 mm gives 1599 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1200mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 810 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1200mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901553488,"sku":"P412K","price":89.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-1200mm-7221271.jpg?v=1786621154"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1200mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 1200mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D412K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 1200 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1599 W (5456 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1599 W against 1238 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 27.48 kg and it holds 4.92 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1200 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1599 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e5456 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1599 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e27.48 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 4.92 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1599 W on a 70 °C mean water temperature, or 2049 W where the system runs at 80 °C. Straight swap for a tired 400 × 1200 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1599 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 823 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D412K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1599 W (5456 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2049 W (6990 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1200 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e27.48 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e4.92 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 33 at the same 400 × 1200 mm gives 2179 W at ΔT50, in a 160 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400-1200\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 33\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 1238 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1200\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901586256,"sku":"D412K","price":115.47,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1200mm-2843957.jpg?v=1779099857"},{"product_id":"kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400-1200","title":"Kartell K-Rad Type 33 Triple Panel Triple Convector Radiator 400mm x 1200mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact T412K is a \u003cstrong\u003eType 33 triple panel, triple convector radiator, 400 × 1200 mm\u003c\/strong\u003e, giving \u003cstrong\u003e2179 W (7435 BTU\/h) at ΔT50\u003c\/strong\u003e. Three panels and three banks of convector fins in a 160 mm case: \u003cstrong\u003e2179 W against 1599 W\u003c\/strong\u003e for a Type 22 the same size — the highest output per width Kartell make. Nett weight is 38.04 kg and it holds 7.32 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 33 triple panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1200 × 160 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e2179 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e7435 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 2179 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e38.04 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 7.32 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 2179 W on a 70 °C mean water temperature, or 2759 W where the system runs at 80 °C. The pick where a slimmer panel the same width cannot reach the load.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 160 mm against 105 mm for a Type 22 — check the projection suits the room.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 2179 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 1122 W from this radiator. This is already the deepest, highest-output panel in the range at this size — if it still falls short, go wider or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact T412K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 33 — triple panel, triple convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2179 W (7435 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2759 W (9413 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1200 × 160 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e38.04 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e7.32 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eSlimmer option?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1200 mm gives 1599 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1200mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 33 runs 400–750 mm high in widths up to 2000 mm, from 1006 W to 5028 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901619024,"sku":"T412K","price":197.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400mm-x-1200mm-9103263.jpg?v=1786621151"},{"product_id":"kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1400mm","title":"Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 1400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact S414K is a \u003cstrong\u003eType 11 single panel, single convector radiator, 400 × 1400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e945 W (3223 BTU\/h) at ΔT50\u003c\/strong\u003e. A single water-carrying panel with one bank of convector fins in a 56 mm case — the slimmest panel in the Kompact range, and the easiest to fit alongside pipework, furniture and door swings. Nett weight is 16.1 kg and it holds 2.94 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 11 single panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1400 × 56 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e945 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e3223 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 945 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e16.1 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 2.94 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 945 W on a 70 °C mean water temperature, or 1210 W where the system runs at 80 °C. Straight swap for a tired 400 × 1400 single panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 400 mm-high panels. Case depth is 56 mm against 70 mm for a Type 21 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 945 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 487 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 21 or Type 22 at the same size if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact S414K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 11 — single panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e945 W (3223 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1210 W (4129 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1400 × 56 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e40 or 55 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e16.1 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2.94 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1400 mm gives 1866 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eA middle step?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 gives 1444 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1400\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901651792,"sku":"S414K","price":68.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1400mm-2888914.jpg?v=1779099857"},{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1400","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 1400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P414K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 1400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1444 W (4927 BTU\/h) at ΔT50\u003c\/strong\u003e. Two water-carrying panels with a single bank of convector fins sit in a 70 mm case: \u003cstrong\u003e1444 W against 945 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. Nett weight is 27.58 kg and it holds 5.74 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 21 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1400 × 70 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1444 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e4927 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1444 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e27.58 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 5.74 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1444 W on a 70 °C mean water temperature, or 1850 W where the system runs at 80 °C. Straight swap for a tired 400 × 1400 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 65 mm or 80 mm, so it lines up with most existing 400 mm-high panels. Case depth is 70 mm against 56 mm for a Type 11 and 105 mm for a Type 22.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1444 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 744 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 22 or 33 if the load needs it.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact P414K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 21 — double panel, single convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1444 W (4927 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1850 W (6311 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1400 × 70 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e65 or 80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e27.58 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e5.74 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 22 at the same 400 × 1400 mm gives 1866 W at ΔT50, in a 105 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 22\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 11 is 56 mm deep and gives 945 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-11-single-panel-single-convector-radiator-400mm-x-1400mm\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 11\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 21 runs 400–900 mm high and 400–2200 mm wide, from 413 W to 3114 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901684560,"sku":"P414K","price":104.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400mm-x-1400mm-3294132.jpg?v=1786621154"},{"product_id":"kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1400mm","title":"Kartell K-Rad Type 22 Double Panel Double Convector Radiator 400mm x 1400mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact D414K is a \u003cstrong\u003eType 22 double panel, double convector radiator, 400 × 1400 mm\u003c\/strong\u003e, giving \u003cstrong\u003e1866 W (6366 BTU\/h) at ΔT50\u003c\/strong\u003e. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: \u003cstrong\u003e1866 W against 1444 W\u003c\/strong\u003e for a Type 21 the same size. Nett weight is 32.06 kg and it holds 5.74 litres of system water.\u003c\/p\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;\"\u003e\n\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eType 22 double panel\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e400 × 1400 × 105 mm\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#e0f2fe;color:#0369a1;font-size:13px;font-weight:600;\"\u003e1866 W at ΔT50\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#fdefe0;color:#c2410c;font-size:13px;font-weight:600;\"\u003eEN 442 tested\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003eWhite enamel RAL 9016\u003c\/span\u003e\u003cspan style=\"display:inline-block;padding:6px 14px;border-radius:999px;background:#f3f4f6;color:#374151;font-size:13px;font-weight:600;\"\u003e10-year guarantee\u003c\/span\u003e\n\u003c\/div\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0284c7;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e6366 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 1866 W\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#0369a1;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e32.06 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 5.74 l\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 300px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#c2410c;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003eEN 442\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eTested and certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px;padding:16px;border-radius:12px;background:#475569;color:#ffffff;\"\u003e\n\u003cdiv style=\"font-size:24px;font-weight:700;line-height:1.2;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eManufacturer guarantee\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eApplications \u0026amp; suitability\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px;\"\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWhere it goes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eWall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 400 mm high it suits a wall where vertical space is tight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eTypical job\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eA room needing roughly 1866 W on a 70 °C mean water temperature, or 2390 W where the system runs at 80 °C. Straight swap for a tired 400 × 1400 panel of the same size.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;flex:1 1 380px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #0284c7;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:14px;margin-bottom:6px;\"\u003eWorks with \/ replaces\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003ePipe centres are 345 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 400 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;padding:14px 16px;border-radius:8px;background:#f4f8fc;border-left:4px solid #475569;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#475569;font-size:14px;margin-bottom:6px;\"\u003eWhen not to choose this\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;\"\u003eThe 1866 W figure is at ΔT50. Run a heat pump at low flow temperatures and it falls hard — Kartell’s own correction factor at ΔT30 is 0.515, so you would get about 961 W from this radiator. Size at the ΔT you will actually run, and step up to a Type 33 where the size allows, or split the load across two radiators.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eKey specifications\u003c\/h3\u003e\u003ctable style=\"width:100%;border-collapse:collapse;margin:0 0 24px;font-size:14px;color:#374151;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eKartell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eK-Rad Kompact D414K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eRadiator type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eType 22 — double panel, double convector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eHeat output\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT50\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e1866 W (6366 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eOutput at ΔT60\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e2390 W (8155 BTU\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eSize and weight\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e400 × 1400 × 105 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eCentre distance\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e345 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWall to centre\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e82.5 or 97.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e32.06 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWater content\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e5.74 l\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#eaf3fb;padding:8px 12px;border:1px solid #e5e7eb;font-weight:700;\"\u003eBuild and rating\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eMax working temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e120 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eWhite enamel, RAL 9016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eStandard\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003eEN 442\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:45%;background:#f4f8fc;padding:9px 12px;border:1px solid #e5e7eb;font-weight:600;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 12px;border:1px solid #e5e7eb;\"\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eInstallation \u0026amp; compatibility\u003c\/h3\u003e\u003cp style=\"margin:0 0 24px;color:#374151;font-size:15px;line-height:1.6;\"\u003eFix no lower than 100 mm from the finished floor. Allow 35 mm from the wall to pipe centre for a manual valve, or 45 mm for a TRV. Kartell requires the system to be cleansed and dosed with inhibitor to BS 7593:2019 — skipping it invalidates the guarantee, which covers product replacement only. Leave the protective packaging on until the radiator is fixed and the tappings are cut.\u003c\/p\u003e\u003ch3 style=\"margin:0 0 12px;font-size:18px;color:#374151;\"\u003eRelated \u0026amp; next steps\u003c\/h3\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;\"\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #0284c7;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#0284c7;font-size:15px;margin-bottom:6px;\"\u003eNeed more output?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 33 at the same 400 × 1400 mm gives 2542 W at ΔT50, in a 160 mm case.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-33-triple-panel-triple-convector-radiator-400-1400\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#0284c7;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 33\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eTight on space?\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eThe Type 21 is 70 mm deep and gives 1444 W at ΔT50 — slimmer, but less heat.\u003c\/div\u003e\n\u003ca href=\"\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-1400\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eView Type 21\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 240px;padding:16px;border:2px solid #cbd5e1;border-radius:8px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#374151;font-size:15px;margin-bottom:6px;\"\u003eOther sizes\u003c\/div\u003e\n\u003cdiv style=\"color:#374151;font-size:14px;line-height:1.55;margin-bottom:12px;\"\u003eType 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.\u003c\/div\u003e\n\u003ca href=\"\/collections\/central-heating-radiators\" style=\"display:inline-block;padding:8px 16px;border-radius:6px;background:#475569;color:#ffffff;font-size:14px;font-weight:600;text-decoration:none;\"\u003eBrowse radiators\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Kartell","offers":[{"title":"Default Title","offer_id":53002901717328,"sku":"D414K","price":134.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/files\/kartell-k-rad-type-22-double-panel-double-convector-radiator-400mm-x-1400mm-5933025.jpg?v=1779099856"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5268\/4624\/collections\/standard-panel-radiators-5024261.jpg?v=1786816871","url":"https:\/\/getplumb.co.uk\/collections\/standard-panel-radiators.oembed?page=8","provider":"Getplumb","version":"1.0","type":"link"}