We dry camp all the time and use the furnace at night without being plugged in. We can only do that one night without running the coach, plugging in or running the generator. However, if we do have electricity for the night, if the temp is not too low, we have found that a small ceramic heater plugged into 120v provides plenty of heat in the bedroom for sleeping. The biggest positives are itís quiet (you donít have the blower cutting in and off all night) and it proves a more even temperature than running the furnace. It also saves on propane. In the Axis, I open the bathroom door to the living room so the heater only has to heat the bedroom.