How would an air source heat pump be affected by cold weather?

When the air temperature outside drops below 3ºC, an air source heat pump’s efficiency levels can reduce but the heat pump will still continue to operate to fulfil the heating and hot water requirements. The Aerona³ heat pumps are designed to work in air temperatures as low as -20ºC so they can operate in cold weather below freezing. Consumers may notice that during cold weather, as the heat pump is not working at its optimal efficiencies, their energy consumption may increase during colder spells. 


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