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Kartell K-Rad Type 11 Single Panel Single Convector Radiator 400mm x 2200mm

by Kartell
SKU S422K
Original price £107.18 - Original price £107.18
Original price
£107.18
£107.18 - £107.18
Current price £107.18

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The Kartell K-Rad Kompact S422K is a Type 11 single panel, single convector radiator, 400 × 2200 mm, giving 1484 W (5064 BTU/h) at ΔT50. 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 2200 mm wide it is a long radiator — check the run of clear wall before ordering.

Type 11 single panel400 × 2200 × 56 mm1484 W at ΔT50EN 442 testedWhite enamel RAL 901610-year guarantee
5064 BTU/h
Output at ΔT50 — 1484 W
25.3 kg
Nett weight — holds 4.62 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 400 mm high it suits a wall where vertical space is tight.
Typical job
A room needing roughly 1484 W on a 70 °C mean water temperature, or 1902 W where the system runs at 80 °C. Straight swap for a tired 400 × 2200 single panel of the same size.
Works with / replaces
Pipe 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.
When not to choose this
The 1484 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 764 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.

Key specifications

Brand Kartell
Model K-Rad Kompact S422K
Radiator type Type 11 — single panel, single convector
Heat output
Output at ΔT50 1484 W (5064 BTU/h)
Output at ΔT60 1902 W (6488 BTU/h)
Size and weight
Dimensions (H × W × D) 400 × 2200 × 56 mm
Centre distance 345 mm
Wall to centre 40 or 55 mm
Weight 25.3 kg
Water content 4.62 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

Need more output?
The Type 22 at the same 400 × 2200 mm gives 2932 W at ΔT50, in a 105 mm case.
View Type 22
A middle step?
The Type 21 gives 2269 W at ΔT50 in a 70 mm case — more heat for only 14 mm more depth.
View Type 21
Other sizes
Type 11 runs 300–900 mm high and up to 3000 mm wide, from 209 W to 2849 W at ΔT50.
Browse radiators

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