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AnswerDo I need new radiators for a heat pump?
Often some, not all. Heat pumps run at lower flow temperatures than gas boilers, so a few undersized radiators usually need upsizing — but many existing radiators can stay.
In more detail
Your installer's heat-loss survey identifies which radiators are too small for low-temperature operation. Upsizing a handful is normal; a full replacement is rarely needed.
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2026 figures, based on Energy Saving Trust, Ofgem & gov.uk data · always confirm with a professional survey.