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Free mainland delivery £200+ · Highlands, islands & NI £9.99
Plan your space

Quick BTU calculator

Enter your room measurements for an estimated heating requirement. Compare radiators without leaving this page.

Starting assumptions: two adjacent outside walls, 1.5m² low-E glazing, insulated cavity walls, ground floor and insulated loft. Check these against your room.

Check or change room assumptions

U-values describe heat passing through a surface; use known building values where available. −3°C outdoors, 10°C below and the default U-values are preliminary assumptions, not a location survey. Unheated lofts use the outdoor temperature; heated floors/ceilings use U 1.36/1.62 and the adjacent-room temperature.

Preliminary rectangular-room estimate, not an installer’s heat-loss survey. It excludes detailed thermal bridging, ground/loft modelling and ventilation-system design. Confirm the room heat loss and radiator output at your heating-system temperatures before ordering.

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900mm wide black towel radiators

Browse the products and check the specifications before ordering.

900mm wide850mm pipe centres5-year radiator warranty
Quick BTU calculatorEstimate your room’s heat requirement here, then compare the radiators below.


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Help choosing your radiator

Useful guides for the sizes and finishes you’re browsing.

Choosing a wide radiator

Plan the width, connections and heating output before ordering.

Read guide

Check replacement fit

Measure pipe centres, projection, valves and bracket positions.

Read guide

Check the heat output

Understand rating conditions and lower-temperature heating.

Read guide

Choosing a towel rail for a family bathroom?

Compare towel capacity, under-window sizes and heat output.

Read guide
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