If it has a heat pump, it will have a system that looks a lot like an air conditioner, with a unit outside that looks like a condensing unit but is really an evaporator, that runs when the weather is cold. The condensing unit might be a combination condensing/evaporating unit. The telling point is that it will be running while you should be heating.Originally Posted by possum
It is very unlikely that you have a heat pump without knowing it.





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