I keep my motorhome stored at the house hooked to to 30 amp service. I use a 1500 watt ceramic heater to keep things from freezing. It keeps up pretty well if the MH has already been heated.
But, we don't have that much freezing weather so I can't say how well it would do if the temps dropped down into the teens.
If it got that cold, I'd run an extension cord from another circuit and run two heaters. As mentioned several times, that furnace will go through a lot of propane.
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2017 Thor ACE 27.2
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