Art Todesco wrote:
That's exactly what I was thinking. However, some newer furnaces,
like my 10 year old unit, have electronics. BTW, I have run my
furnace on my cheap 4KW Coleman genset with no problems.

Electronics would be the least of my worries; anything worth a crap would
have varistor protection and decent brownout and overvoltage protection.
Harmonics would be most injurious to motors, and it'd have to be pretty
severe - motors can run fine on MSW inverters which have gobs of harmonics.