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Heat pumps can't take the cold? Nordics debunk the myth
(techxplore.com)
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this post was submitted on 01 Nov 2023
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No, I believe it's the heating that does it. In petrol cars the heating is a side effect of the engine running. Using it to heat the car in a way improves the fuel efficiency. In an EV the heat doesn't come from the engine, so the battery needs to feed both the engine and the heater.
You can have the engine on and not driving and your petrol will last quite long, not so much with an EV, unfortunately.