You clearly don't know if this is your only source. "Below 0° Fahrenheit, heat pumps can still heat your home with more than twice the efficiency of gas heatin

You clearly don't know if this is your only source. "Below 0° Fahrenheit, heat pumps can still heat your home with more than twice the efficiency of gas heating or standard electric heating (such as electric furnaces and baseboard heaters). They’ve been tested and approved as far north as the Arctic Circle, and are popular options in very cold countries like Finland and Norway." Finland has over 60% heat pumps. And heat pumps, just to be clear, work by generating a temp difference. The main problem is the efficiency and that drops also because there is a heating cycle needed for the air intake. How many models did you actually research yourself?