I live in an area of the US where the temperature ranges from approximately -15F to 32F for 3 months of the year. Heat pumps are not particularly efficient in

I live in an area of the US where the temperature ranges from approximately -15F to 32F for 3 months of the year. Heat pumps are not particularly efficient in those temperature ranges. In more mild climates, heat pumps are great. It's just not a panacea.