westend wrote:
If I didn't already have a vented non-electric heater, I'd be all over that.
Those sq. ft. estimations for heating are about standard residential heating requirements. My 22' trailer has about 140 sq. ft. of floor but a lot of that is taken up by fixtures, of course. The 20K btu heater I use is operated on "low" or "pilot" most of the time. I think that 8K btu unit would heat a standard trailer or class C pretty well.
That depends to a large extent on how cold it is outside. If you are camping in cool or only moderately cold conditions, not too much below freezing, it would probably be sufficient.
A typical RV furnace is what, around 20,000 or 30,000 BTU. If it can operate with a perhaps a 15% duty cycle and maintain a comfortable temperature, this should be adequate. (Another comparison is with a 1500W electric heater, which is around 5000 BTU. This would be equivalent to one and a half typical electric space heaters.)
One decided advantage of the larger furnace is that it can heat up a cold RV much more quickly. This would take a pretty long time to get a cold RV up to room temperature, even if it can maintain that temperature fairly well.
