[8note]

Resistive electricity will be close to 100% efficient, and heat pumps even higher depending on the outdoor temperature.

What kinda of air conditioners beat that for efficiency? I don't think we covered those in heat engines

[andbberger]

Air conditioners are heat pumps. Resistive heating is inefficient compared to burning something, and very inefficient compared to heat pumps

[pixl97]

In addition to the other comments your missing the heat delta.

We commonly cool from 100 to 70F, or 30 degrees.

Yesterday we were warming from 0 to 65, or a 65 degrees delta.

[sokoloff]

> What kinda of air conditioners beat that for efficiency?

All of them beat resistance electric.