[throw0101b]

> 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

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

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).

[ZeroGravitas]

And if you're building a new subdivision or apartment block, you can skip the entire gas system connection. Safer and cheaper.

Places off the current gas grid are also low hanging fruit generally.