{"product_id":"kartell-k-rad-type-21-double-panel-single-convector-radiator-400-2200","title":"Kartell K-Rad Type 21 Double Panel Single Convector Radiator 400mm x 2200mm","description":"\u003cp style=\"margin:0 0 16px;color:#374151;font-size:16px;line-height:1.6;\"\u003eThe Kartell K-Rad Kompact P422K is a \u003cstrong\u003eType 21 double panel, single convector radiator, 400 × 2200 mm\u003c\/strong\u003e, giving \u003cstrong\u003e2269 W (7742 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\u003e2269 W against 1484 W\u003c\/strong\u003e for a Type 11 the same size, for 14 mm more depth. At 2200 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 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 × 2200 × 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;\"\u003e2269 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;\"\u003e7742 BTU\/h\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eOutput at ΔT50 — 2269 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;\"\u003e43.34 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:0.9;margin-top:4px;\"\u003eNett weight — holds 9.02 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 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 2269 W on a 70 °C mean water temperature, or 2907 W where the system runs at 80 °C. Straight swap for a tired 400 × 2200 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 2269 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 1169 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 P422K\u003c\/td\u003e\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;\"\u003e2269 W (7742 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;\"\u003e2907 W (9918 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 × 2200 × 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;\"\u003e43.34 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;\"\u003e9.02 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 400 × 2200 mm gives 2932 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-2200mm\" 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 1484 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-2200mm\" 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":53002902995280,"sku":"P422K","price":163.84,"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-2200mm-5689376.jpg?v=1786621103","url":"https:\/\/getplumb.co.uk\/products\/kartell-k-rad-type-21-double-panel-single-convector-radiator-400-2200","provider":"Getplumb","version":"1.0","type":"link"}