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Looking for a horizontal radiator around 500mm high and 1200mm wide? We have 4 horizontal radiators in stock in this size from Ethiant, priced from £205.63 to £458.68 with heat outputs from 3,254 to 8,376 BTU/hr (ΔT50). Actual dimensions in this group run from 500–500mm high and 1190–1190mm wide; the exact size, pipe centres and output of each model are on its product page.
A 500 x 1200 horizontal radiator is the size most UK homes were built around, so it usually replaces an existing radiator without moving the pipework, and the highest-output models here will heat a big open-plan space, or one radiator doing the work of two. 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.




| Model | Finishes | Sizes in this group | Heat output (BTU/hr, ΔT50) | From |
|---|---|---|---|---|
| Traditional 2 Column Horizontal Radiators 500 Height | White | 500 × 1190mm | 3,254 | £205.63 |
| Traditional 3 Column Horizontal Radiators 500 Height | White | 500 × 1190mm | 4,486 | £278.92 |
| Traditional 4 Column Horizontal Radiators 500 Height | White | 500 × 1190mm | 5,716 | £332.80 |
| Traditional 6 Column Horizontal Radiators 500 Height | White | 500 × 1190mm | 8,376 | £458.68 |
Between 3,254 and 8,376 BTU/hr at ΔT50 across the 4 models on this page. The highest output here is the Traditional 6 Column Horizontal Radiators 500 Height at 8,376 BTU/hr (2,456 W). All figures are the manufacturers’ certified outputs to EN 442, quoted at ΔT50 — the UK standard for sizing central-heating radiators.
On heat per pound it is the Traditional 6 Column Horizontal Radiators 500 Height: 8,376 BTU/hr for £458.68, about 18 BTU for every £1. The cheapest model on the page starts at £205.63.
It depends on the model — the range on this page runs from a typical living room or a large bedroom at 3,254 BTU/hr up to a big open-plan space, or one radiator doing the work of two at 8,376 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.
In this group we have 4 in white. Colour is chosen as a finish option on the product page.
A pair of radiator valves (a thermostatic set is the usual choice) — see our valves and accessories. Wall brackets are supplied with every radiator, and column radiators in this group can be fitted with feet where the wall will not take the full weight. Delivery to mainland England and Wales is free.
Back to Radiators by size.