How do heat pumps work and why are the energy efficient?
Edit: the question is sufficiently answered. Thanks guys!
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Heatpumps do not work the same as other heating units. They cool the same way but they heat by concentrating existing heat (energy) in the air and pumping it into your home. This is why you need a secondary heat furnace or strip when the temp gets below 40f or so bc it cannot concentrate the heat enough to warm the house to above 65f or so at that point.
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