> But still more expensive than gas in most areas? Using numbers from the non-profit Efficiency Maine, with natural/methane gas at $2.561 per CCF (therm), and

> But still more expensive than gas in most areas? Using numbers from the non-profit Efficiency Maine, with natural/methane gas at $2.561 per CCF (therm), and electricity at $0.1595 per kWh, standard efficiency heat pumps have better $/MMBtu down to about 0F/-18C, and high performance HPs down to about -10F/-25C, per this presentation: * https://www.youtube.com/watch?v=OcwIz6heDss&t=39m30s https://www.youtube.com/watch?v=OcwIz6heDss&t=39m30s You'll have to do the math with your local prices. The same channel also has a presentation on dual fuel / hybrid setups: * https://www.youtube.com/watch?v=T_9P3Dn7is0 https://www.youtube.com/watch?v=T_9P3Dn7is0 Generally: if you're buying new HVAC+D equipment for your home, you might as well buy a heat pump instead of a 'simple' AC unit, and there are heat pumps that can work down below freezing quite well (which is probably good enough for most of the US population, except in the coldest locations).