The Kartell K-Rad Kompact D515K is a Type 22 double panel, double convector radiator, 500 × 1500 mm, giving 2391 W (8159 BTU/h) at ΔT50. Two panels, each backed by its own bank of convector fins, fill a 105 mm case: 2391 W against 1224 W for a Type 11 the same size. Nett weight is 42.45 kg and it holds 7.5 litres of system water.
Type 22 double panel500 × 1500 × 105 mm2391 W at ΔT50EN 442 testedWhite enamel RAL 901610-year guarantee
8159 BTU/h
Output at ΔT50 — 2391 W
42.45 kg
Nett weight — holds 7.5 l
EN 442
Tested and certified
10 years
Manufacturer guarantee
Applications & suitability
Where it goes
Wall-hung on a sealed or open-vented wet heating system, fixed no lower than 100 mm off the finished floor. At 500 mm high it suits a wall where vertical space is tight.
Typical job
A room needing roughly 2391 W on a 70 °C mean water temperature, or 3063 W where the system runs at 80 °C. Straight swap for a tired 500 × 1500 panel of the same size.
Works with / replaces
Pipe centres are 445 mm with a wall-to-centre of 82.5 or 97.5 mm, so it lines up with most existing 500 mm-high panels. Case depth is 105 mm against 70 mm for a Type 21 and 160 mm for a Type 33.
When not to choose this
The 2391 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 1231 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.
Key specifications
| Brand |
Kartell |
| Model |
K-Rad Kompact D515K |
| Radiator type |
Type 22 — double panel, double convector |
| Heat output |
| Output at ΔT50 |
2391 W (8159 BTU/h) |
| Output at ΔT60 |
3063 W (10452 BTU/h) |
| Size and weight |
| Dimensions (H × W × D) |
500 × 1500 × 105 mm |
| Centre distance |
445 mm |
| Wall to centre |
82.5 or 97.5 mm |
| Weight |
42.45 kg |
| Water content |
7.5 l |
| Build and rating |
| Max working pressure |
10 bar |
| Max working temperature |
120 °C |
| Finish |
White enamel, RAL 9016 |
| Standard |
EN 442 |
| Warranty |
10 years |
Installation & compatibility
Fix 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.
Related & next steps
Tight on space?
The Type 11 is 56 mm deep and gives 1224 W at ΔT50 — slimmer, but less heat.
View Type 11
Other sizes
Type 22 runs 300–900 mm high and up to 3000 mm wide, from 420 W to 5504 W at ΔT50.
Browse radiators
At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.
🆓 Free Local Delivery (Orders £100 & above)
We offer FREE delivery on orders £100 or more
for selected local areas.
Eligible Postcodes Include:
- RG*
- SL*
- OX10*, OX11*, OX49*
- HP1*, HP3*, HP8*, HP9*, HP10*, HP11*, HP12*, HP13*, HP14*
- WD*, HA*, UB*, TW*, KT*
- W1* – W9*
- NW*, SW*
Delivery Time: 2–4 working days
Shipping Cost: £0.00
📦 Standard Shipping (Weight-Based Rates)
For orders that do not qualify for free delivery, standard
shipping rates apply based on total cart weight.
- For cart weight between 0–2 kg, the shipping cost is £4.50 with a delivery time of 2–4 working days.
- For cart weight between 2–24 kg, the shipping cost is £9.99 with a delivery time of 2–4 working days.
- For cart weight between 24 kg and above, the shipping cost is £60 with a delivery time of 2–4 working days.
🧱 Block Salt (Harvey’s) – Unit-Based Shipping
This rate applies only to Harvey’s block salt products.
- £7.99 is charged for every 3 items.
- The charge increases by £7.99 for each additional set of 3 items.
Examples:
- 1–3 items → £7.99
- 4–6 items → £15.98
- 7–9 items → £23.97
Delivery Time: 2–4 working days
📏 Large / Long Items (Length-Based Shipping)
For oversized items where the product length is 1.5 metres or more:
Conditions:
- Product length ≥ 1.5 m
- Cart weight ≤ 40 kg
Shipping Cost: £18.00 (flat rate)
Delivery Time: 2–4 working days
Collection from Store
Customers can also choose to collect their order from our store in
Reading, UK, at no additional charge. For any questions regarding shipping, please contact our support team at online@getplumb.co.uk.
