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thread100 OP t1_j7iq3o8 wrote on February 7, 2023 at 2:03 AM

Reply to comment by redsoxpanama in Heat Pumps During Recent Cold Weather by thread100

We had a hybrid system from a company in Nashua. It would automatically switch from heat pump to oil at a predetermined temperature. I think temp was in the teens a few years ago. Very happy with it.