1800mm Wide Horizontal Radiators

We have 7 horizontal radiators 1800mm wide in stock from Carisa, from 280mm to 600mm high, priced from £258.17 to £889.82 with heat outputs from 1,828 to 6,748 BTU/hr (ΔT50).

Width is what a radiator has to fit; height and panel depth are what give it output. If the wall only allows 1800mm, go taller or choose a double-panel model rather than settling for less heat. Every model is in stock for free delivery to mainland England and Wales, and each product page shows the certified heat output for every size so you can match it to your room with our BTU calculator.

1800mm Wide Horizontal Radiators in stock

Compare every 1800mm wide horizontal radiator in stock

Model	Finishes	Sizes in this group	Heat output (BTU/hr, ΔT50)	From
Carisa Nemo XL Horizontal Aluminium Designer Radiator	Textured Black, Textured Anthracite, Textured White	565 × 1800mm, 470 × 1800mm, 375 × 1800mm, 280 × 1800mm	1,828–3,642	£258.17
Carisa Monza XL Horizontal Aluminium Designer Radiator	Textured Black, Textured Anthracite, Textured White	565 × 1800mm, 470 × 1800mm, 375 × 1800mm, 280 × 1800mm	2,050–4,100	£267.84
Carisa Tallis XL Horizontal Aluminium Designer Radiator	Textured Navy Blue, Textured Anthracite, Textured White	590 × 1800mm, 470 × 1800mm, 350 × 1800mm	2,533–4,222	£361.58
Carisa Nemo XL Double Horizontal Aluminium Designer Radiator	Textured Black, Textured Anthracite, Textured White	565 × 1800mm, 470 × 1800mm, 375 × 1800mm, 280 × 1800mm	3,224–6,447	£368.28
Carisa Monza XL Double Horizontal Aluminium Designer Radiator	Textured Black, Textured Anthracite, Textured White	565 × 1800mm, 470 × 1800mm, 375 × 1800mm, 280 × 1800mm	3,224–6,447	£368.28
Carisa Tallis Double XL Horizontal Aluminium Designer Radiator	Textured Navy Blue, Textured Anthracite, Textured White	590 × 1800mm, 470 × 1800mm, 350 × 1800mm	4,049–6,748	£519.31
Carisa Nemo Horizontal Aluminium Designer Radiator	Textured Black, Textured Anthracite, Textured White	600 × 1800mm	4,888	£595.20

Questions about 1800mm wide horizontal radiators

How much heat does a 1800mm wide horizontal radiator give out?

Between 1,828 and 6,748 BTU/hr at ΔT50 across the 7 models on this page. The highest output here is the Carisa Tallis Double XL Horizontal Aluminium Designer Radiator at 6,748 BTU/hr (1,979 W). All figures are the manufacturers’ certified outputs to EN 442, quoted at ΔT50 — the UK standard for sizing central-heating radiators.

Which 1800mm wide horizontal radiator is the best value for heat?

On heat per pound it is the Carisa Nemo XL Double Horizontal Aluminium Designer Radiator: 6,447 BTU/hr for £657.70, about 10 BTU for every £1. The cheapest model on the page starts at £258.17.

What size room will it heat?

It depends on the model — the range on this page runs from a bedroom, home office or small kitchen at 1,828 BTU/hr up to a large living room or an open-plan kitchen-diner at 6,748 BTU/hr. A well-insulated modern room needs far less than an older one with single glazing and an outside wall, so use our BTU calculator with your room’s measurements before you choose.

What colours and finishes are available?

In this group we have 7 in anthracite, 7 in white, 5 in black. Colour is chosen as a finish option on the product page.

What else do I need to fit it?

A pair of radiator valves (a thermostatic set is the usual choice) — see our valves and accessories. Wall brackets are supplied with every radiator. Delivery to mainland England and Wales is free.

Related sizes and ranges

1500mm Wide Horizontal Radiators · 300 x 1800mm Horizontal Radiators · 400 x 1800mm Horizontal Radiators · 500 x 1800mm Horizontal Radiators · 600 x 1800mm Horizontal Radiators

Back to Radiators by size.