I had a heat pump with electric furnace in my office. We did not have gas available at the time. We put the heat on 50 when not in the office and upon returning turned it up. The furnace would run for a short time and then the heat pump took over and ran for the day. I wondered how it would work in freezing temps. I went to the office one weekend in -10 F. and found that the pump worked just fine and the furnace never ran. Go figure since everyone said it would not be sufficient in those temps.
______________________________________
I am a retired workaholic and a continuing aquaholic
|