Originally Posted by
GeezerSteve
Air bag pressure is adjustable, so better when they work (i.e., no leaks). The air bags on my old truck failed after a few years. Sumo Springs are poor man's airbags, bomber, simple and work fine for my rig.
The upside is that we sleep better. Maybe it's partly because each of us have spent lots of nights in tents on cold mountaineering trips and compared to that the camper is luxury, although the bigger reason is that the furnace thermostat on/off window range in cold weather is est. 15F, so when we run the furnace we're frequently adjusting our covers or we're either too warm or too cool, and either way it disrupts our sleep.
Propane use is not an issue. OTOH, battery draw to operate the furnace fan can be an issue for some rigs in cold weather.
I can think of no obvious downside except, maybe, increased condensation issues in some conditions.
In really cold temps we have the option of using the furnace, although we have not done so since we switched to winter bags/no furnace. FTR, our coldest night was around -15F, not as as cold as it gets in much of the interior west.