We camped at an electric only site at -5F, the water tank was under the bed, the furnace ran a lot, I connected an electric heater that helped the furnace out a lot, get a propane “T” with a hose to connect to a 20# ( BBQ Bottle ). All of the tanks and pipes are enclosed. We have a 2014 Thor Chateau 31W and it has electric heating pads and they are “Crap” at keeping the tanks unfrozen. It was also advertised as a 4 Seasons model.
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