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AnswerDo heat pumps work in winter?
Yes — air-source heat pumps keep working in freezing weather, down to about −15°C to −25°C, and are the standard heating across cold countries like Norway and Sweden.
In more detail
They're less efficient on the coldest days, so a correctly-sized unit and good insulation matter, but they heat UK homes through winter reliably.
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2026 figures, based on Energy Saving Trust, Ofgem & gov.uk data · always confirm with a professional survey.