Gas is only efficient for heating when compared to resistive electric heating. Modern heat pump systems are capable of producing 2.5x the thermal energy as they

Gas is only efficient for heating when compared to resistive electric heating. Modern heat pump systems are capable of producing 2.5x the thermal energy as they consume electrical energy even when it's below freezing. The hotter it gets from there, the more efficient they get. The main issue about doing electric heating in a very cold zone is what the reliability of the electrical system is. New York has a pretty good record with their hydroelectric generation though.