Big rooms need serious heat — not oversized radiators dominating the walls

The Large Room Kit delivers nearly 2kW across four walls from 16.5 metres of skirting-level heating. Designed for open-plan living spaces, large lounges and family rooms — the rooms where a single radiator was never enough and two radiators meant losing twice the wall space.

Boiler Output

1,980W

6,530 BTU — from 16.5 metres of skirting

Heat Pump Output

990W

3,260 BTU — at low flow temperatures (35–45°C)

Why it works

Open-plan comfort without a radiator in sight.

Full perimeter heating

Warmth wraps the entire room — no cold end, no hot wall, no dead zones behind the sofa. The even comfort of underfloor heating, without lifting a single floorboard.

Reclaim every wall

Removing two or three radiators gives back up to 2.7 metres of wall space. In an open-plan room, that's a bookcase, a sideboard, or simply the clean lines you designed the space for.

Nearly 2kW, invisibly delivered

1,980W from a standard boiler. On a heat pump at 40°C, you're still generating close to 1kW — enough for well-insulated large rooms, without a single oversized radiator panel.

A clean, considered interior

ThermaSkirt looks like skirting board. Paintable to match any décor. No industrial panel radiators, no column rads cluttering the room — just clean walls and genuine warmth.

What's in the box

Complete kit for four-wall coverage

The full package for large rooms — including external corner capability for chimney breasts and alcoves.

13 × 4.5m + 1 × 3.0m BM2 skirting — with wall brackets, reflective backing foil and top gasket
21 × Universal Feed & Return Kit — TRV valve, lockshield valve and all connection fittings
33 × Internal 90° corner kits
41 × External 90° corner kit — for chimney breasts and projecting walls
52 × In-line Connection Kits — joins longer runs with seamless push-fit joints
61 × Installation & Spares Kit — spare O-rings, silicone grease, gasket adhesive, tools

Features & benefits

Built to last. Designed to disappear.

Provided as a kit of parts — cuts to length with a standard chop saw and suitable blade

Tough, double epoxy powder-coated aluminium finish resists scratching and marking

Works with any boiler or heat pump — no system changes required

Paintable to match any interior — white as standard (RAL 9010)

75% recycled aluminium, UK manufactured, fully recyclable at end of life

10-year manufacturer warranty — expected lifespan of 40+ years

Not sure which kit fits your room?

Upload your floorplan or book a free 15-minute call with our design team.

Get Free Advice ?

BM2 Profile

This kit uses the Deco BM2 (115mm) profile — our standard-height skirting. For rooms needing higher output per metre, the BM3 (170mm) profile delivers 50% more heat from the same wall length.

BSRIA Tested to EN 442-1

Made in Britain

Excellent on Trustpilot

85,000+ Systems Installed

10-Year Warranty