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AnswerSingle vs double panel radiators: which do I need?
A double-panel radiator gives roughly twice the heat output of a single of the same size — choose double for larger or colder rooms, single for small, well-insulated ones.
In more detail
If your BTU requirement is high but wall space is limited, a double panel packs more output into the same width.
Use the radiator-type matcher → · All radiator types →
2026 figures · BTU uses standard UK heat-loss methodology; running costs use the Ofgem price cap · always confirm with a professional.