Yes, the furnace will kick in often in coooold weather. We use a 20,000 btu blue flame propane heater during the day to keep the rig toasty warm. But we run the furnace at about 60-65 °F at night to keep the pipes in the belly from freezing. About 3-4 days per bottle in the coldest weather is about normal. At least it was for us until we added the blue flame heater. It sits in the living room with a 10 ft hose connected to a "quick disconnect" connector in the propane line.
Orv
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