What Temperature Should a Hybrid Heat Pump Switch to Furnace Mode in Massachusetts?

A metal HVAC unit with insulated ductwork is installed in a dimly lit basement with exposed brick and concrete walls.

What Temperature Should a Hybrid Heat Pump Switch to Furnace Mode? If you have a hybrid heating system, what Mass Save calls a dual fuel heat pump setup,  you’ve got what I consider the smartest configuration for Massachusetts homes right now. An electric heat pump handles most of your heating efficiently, and a gas furnace […]