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Work out exactly what radiator you need — then find it.
Free BTU calculator, running-cost tool, type matcher and radiator finder — plus honest, neutral guides. We don't sell radiators; we help you buy the right one.
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What size radiator do you need?
Enter your room for BTU, watts and matching radiators in seconds.
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The questions people ask
What size radiator for a 3m x 3m living room?
A 3m × 3m living room needs roughly 3,316 BTU (972 W)…
What size radiator for a 3m x 4m living room?
A 3m × 4m living room needs roughly 4,422 BTU (1,296 …
What size radiator for a 4m x 3m living room?
A 4m × 3m living room needs roughly 4,422 BTU (1,296 …
What size radiator for a 4m x 4m living room?
A 4m × 4m living room needs roughly 5,896 BTU (1,728 …
What size radiator for a 4m x 5m living room?
A 4m × 5m living room needs roughly 7,370 BTU (2,160 …
What size radiator for a 5m x 4m living room?
A 5m × 4m living room needs roughly 7,370 BTU (2,160 …
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