Tech connections has what you're looking for: https://youtu.be/lBVvnDfW2Xo https://youtu.be/lBVvnDfW2Xo Efficiency wise, the comparison between a heat pump and

Tech connections has what you're looking for: https://youtu.be/lBVvnDfW2Xo https://youtu.be/lBVvnDfW2Xo Efficiency wise, the comparison between a heat pump and a furnace depends on the outside temperature. Heat pumps lose their efficiency for high ∆T, so for winter in a Russia, a furnace is likely the better option