Quiet heater that doesn’t drain batteries ?

down home wrote:
I Our Mh we always had a window cracked open. No way at sub freezing temps the heat Pumps could keep it warm so the furnaces kick in. Build up of moisture inside from the furnaces get bad. If you are dry camping a big battery bank powering the blowers on the furnaces is about your only option. When people buy a Fifth Wheel of Trailer they at least on their first unit don't seem to think about cold weather packages and heating. You need the furnaces to also keep the tanks and lines from freezing. Some heat is directed their way. An onboard generator was/is an option on some unites, and tha4t would be the only logical way to power electric heaters. We ran a small heater off inverter and batteries once and it sucked the batteries down real quick. But lead acid should be fully cycled sometimes. As to noise. I would shop the two but possibly more units available for RVs. The Atwood and Suburban fit the same space, I believe, but don't quote me. We never looked at a replacement. Small Squirrel cage blowers in the furnace designed for the space RV Mfgs provide are loud but on ours the furnace combustion is the most of the noise, I think.. On ours with the bedroom door closed the noise exposure is reduced.

Your furnace cannot produce even a tiny bit of moisture inside the RV under any circumstances barring a major combustion chamber failure which would be accompanied by significant carbon monoxide in the living space. The moisture comes from people and cooking.