Heat pump no matter what type of furnace you have. Here in Florida, we use heat maybe 5 days a year, whereas we use the cooling cycle at least 200 days a year. The heat pump is much more efficient to run than a standard air conditioner. A heat pump is also more efficient to heat a house than using an electric furnace, much more. I had a 5500sq ft house with 3 heat pumps (new house we built) than was cheaper to operate than a 3600 Sq ft house (also new, 20 miles from the house above) with a natural gas furnace and a typical air conditioner. We used the heat for over 60 days and cooling for over 200 days
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