What climate zone are you in? (assuming US) https://learnmetrics.com/wp-content/uploads/hspf4-and-hspf5-ratings-with-climate-zones-768x535.jpg https://learnmetr

What climate zone are you in? (assuming US) https://learnmetrics.com/wp-content/uploads/hspf4-and-hspf5-ratings-with-climate-zones-768x535.jpg https://learnmetrics.com/wp-content/uploads/hspf4-and-hspf5-... If you're in 1, 2, or 3, heat pumps are definitely the right option. In zone 4 or 5, newer cold temperature heat pumps are a good idea. In 6, 7, or 8 it's less of a sure thing, and you will likely want a backup source for the colder days.