Heat pumps
Do heat pumps work in cold weather?
Yes. Modern UK air-source heat pumps are tested to operate at -20°C and remain efficient down to about -10°C in real-world use — well below typical UK winter lows. Norway, where winter temperatures regularly drop below -20°C, has heat pumps in 6 of every 10 homes. The 'heat pumps don't work in winter' claim is one of the most persistent UK retrofit myths, and it's wrong.
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