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Heat pumps twice as efficient as fossil fuel systems in cold weather, study finds
(www.theguardian.com)
this post was submitted on 12 Sep 2023
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Technology
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Some of the stations in Antarctica use heat pumps. They have been proven to work effectively at -53°C (-64°F) and do so reliably.
Are they more efficient at more reasonable temperatures? Yes. But they still work even when it's very cold outside.
How well a heat pump works in cold temperatures obviously depends what temperatures it was designed to operate at. Don't waste your money on a model that is designed to operate in a different climate. In fact a lot of heat pumps aren't even capable of heating at all - they can only output cold air (which they can do even if it's stinking hot outside by the way).