Kartell K-Rad Type 33 Triple Panel Triple Convector Radiator 400mm x 800mm

Name: Kartell K-Rad Type 33 Triple Panel Triple Convector Radiator 400mm x 800mm
Brand: Kartell
SKU: T408K
Price: 131.62 GBP
Availability: InStock

by Kartell

SKU T408K

£131.62 - £131.62

£131.62

£131.62 - £131.62

£131.62

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The Kartell K-Rad Kompact T408K is a Type 33 triple panel, triple convector radiator, 400 × 800 mm, giving 1453 W (4957 BTU/h) at ΔT50. Three panels and three banks of convector fins in a 160 mm case: 1453 W against 1066 W 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.

Type 33 triple panel400 × 800 × 160 mm1453 W at ΔT50EN 442 testedWhite enamel RAL 901610-year guarantee

4957 BTU/h

Output at ΔT50 — 1453 W

25.36 kg

Nett weight — holds 4.88 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 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.

Works with / replaces

Pipe 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.

When not to choose this

The 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.

Key specifications

Brand	Kartell
Model	K-Rad Kompact T408K
Radiator type	Type 33 — triple panel, triple convector
Heat output
Output at ΔT50	1453 W (4957 BTU/h)
Output at ΔT60	1839 W (6275 BTU/h)
Size and weight
Dimensions (H × W × D)	400 × 800 × 160 mm
Centre distance	345 mm
Wall to centre	82.5 or 97.5 mm
Weight	25.36 kg
Water content	4.88 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

Slimmer option?

The Type 22 at the same 400 × 800 mm gives 1066 W at ΔT50, in a 105 mm case.

View Type 22

Other sizes

Type 33 runs 400–750 mm high in widths up to 2000 mm, from 1006 W to 5028 W at ΔT50.

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