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Kartell K - Rad Type 11 Single Panel Single Convector Radiator 900mm x 500mm - Getplumb
Kartell K - Rad Type 11 Single Panel Single Convector Radiator 900mm x 500mm - Getplumb
Kartell K-Rad Type 22 Double Panel Double Convector Radiator 750mm x 400mm - Getplumb
Kartell K-Rad Type 22 Double Panel Double Convector Radiator 750mm x 400mm - Getplumb
Kartell K-Rad Type 22 Double Panel Double Convector Radiator 750mm x 400mm - Getplumb
Kartell K - Rad Type 11 Single Panel Single Convector Radiator 900mm x 500mm - Getplumb
Kartell K - Rad Type 11 Single Panel Single Convector Radiator 900mm x 500mm - Getplumb
Kartell K-Rad Type 22 Double Panel Double Convector Radiator 750mm x 400mm - Getplumb
Kartell K-Rad Type 22 Double Panel Double Convector Radiator 750mm x 400mm - Getplumb
Kartell K-Rad Type 22 Double Panel Double Convector Radiator 750mm x 400mm - Getplumb

Kartell K-Rad Type 11 Single Panel Single Convector Radiator 900mm x 500mm

Product Logo
SKU S905K
£69.49 - £69.49
£69.49
£69.49 - £69.49
£69.49

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The Kartell K-Rad Kompact S905K is a Type 11 single panel, single convector radiator, 900 × 500 mm, giving 649 W (2216 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. Nett weight is 12.9 kg and it holds 1.75 litres of system water.

Type 11 single panel900 × 500 × 56 mm649 W at ΔT50EN 442 testedWhite enamel RAL 901610-year guarantee
2216 BTU/h
Output at ΔT50 — 649 W
12.9 kg
Nett weight — holds 1.75 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 900 mm high it needs a clear wall rather than an under-window gap.
Typical job
A room needing roughly 649 W on a 70 °C mean water temperature, or 832 W where the system runs at 80 °C. Straight swap for a tired 900 × 500 single panel of the same size.
Works with / replaces
Pipe centres are 845 mm with a wall-to-centre of 40 or 55 mm, so it lines up with most existing 900 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 649 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 334 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 S905K
Radiator type Type 11 — single panel, single convector
Heat output
Output at ΔT50 649 W (2216 BTU/h)
Output at ΔT60 832 W (2839 BTU/h)
Size and weight
Dimensions (H × W × D) 900 × 500 × 56 mm
Centre distance 845 mm
Wall to centre 40 or 55 mm
Weight 12.9 kg
Water content 1.75 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 900 × 500 mm gives 1225 W at ΔT50, in a 105 mm case.
View Type 22
A middle step?
The Type 21 gives 941 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
649W
Heat Output
2216 BTU
BTU Output
900mm
Height
500mm
Width

Key features

01

Space-Saving Vertical Design

Tall format makes it ideal for narrow wall spaces while maximizing heat output.

02

Slim Type 11 Profile

Single panel and convector design ensures minimal wall projection.

03

Reliable Heat Output

Provides 649W of consistent warmth, suitable for smaller to medium rooms.

04

Durable White Finish

Powder-coated surface offers long-lasting protection and a clean modern look.

05

EN442 Certified Performance

Tested to meet European standards for efficiency and output reliability.

06

Easy Integration

Compatible with standard central heating systems for hassle-free installation.

Technical specification

Find all the essential technical information

Product Code
S905K
Radiator Type
Type 11 (Single Panel, Single Convector)
Heat Output
649W / 2216 BTU
Delta Rating
ΔT50 (EN442)
Height
900mm
Width
500mm
Material
Steel
Finish
White Powder Coated
Installation Type
Wall Mounted
Application
Domestic Heating

What's included

✓ Kartell K-Rad Type 11 Radiator (S905K)
✓ Wall Mounting Brackets
✓ Fixings Pack

Shipping information

Standard delivery

1–3 working days

Free local delivery over £100

Heavy item delivery

34.5kg unit — pallet delivery, please ensure access

£60.00

Store pickup

GetPlumb Reading store — usually ready in 24 hours

Free

Good to know

  • Tracking details sent by email once dispatched
  • Someone needs to be present to receive heavy items
  • Deliveries to Scottish Highlands and offshore may take longer — check at checkout
  • Installation is not included — see our approved installer network

Need more information regarding shipping?

View our complete shipping policy for delivery charges, eligible postcodes, delivery times, exclusions and more.

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Frequently asked questions

What type of radiator is the S905K? +
It is a Type 11 radiator, meaning it has one panel and one convector for efficient heat output with a slim profile.
Is this radiator suitable for small rooms? +
Yes, its vertical design makes it perfect for rooms with limited wall width such as bathrooms, hallways, or compact bedrooms.
What heating systems is it compatible with? +
It works with all standard central heating systems including gas boilers and combi systems.
Does it come with valves? +
No, radiator valves such as TRVs and lockshield valves are sold separately.
What does Delta T50 mean? +
Delta T50 is the standard temperature difference used to measure radiator heat output under typical UK heating conditions.
JM RH SP
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