Yes, my current unit is 120v, with natural gas heating.. it will easily run on a 2k Honda generator. its not all that big.. the electronics/thermstat and fan runs as if it were in the grid.. but my Geothermal heat pumps at my last house were 220v.. they had to have a coil boost to run the fan off an inverter.. they were electric strip, but that would be off, and a fireplace draft would pull from the overhead brick.. it would warm the house amazingly.