I was reading your article about RV heating and I notice that you did not talk about the Blue Flame Vent-Free Wall Heater. I was told that Blue Flame heaters works by steadily burning the gas fuel to warm air, which is then circulated throughout the room in a steady stream.
This technique offers a better overall warming of the living area without intense hot spots that are frequently experienced with infrared heating units. The warmed area is wider and more comfortable. In unvented units, the high efficiency of the unit burns the fuel almost entirely, leaving no toxic waste to be vented. Thanks for your great articles.
I did not include the Blue Flame heaters from Desa and Procom as they are larger than the type used for supplemental heat in RVs.