I've lived in numerous houses and apartments in Georgia built in the 50s, 60s, 80s, and 00s. Every single one used a gas furnace. Every heat pump system I've

I've lived in numerous houses and apartments in Georgia built in the 50s, 60s, 80s, and 00s. Every single one used a gas furnace. Every heat pump system I've seen had a propane or natural gas backup furnace. The only times I've ever seen electric were in water heaters and stoves.