The first issue involves heating your RV. We have two propane furnaces in our fifth wheel RV. They are not the most quiet to operate but will keep you today warm and toasty. Another issue is due to their efficiency. RV furnsces are not very efficient since much of their heat is exhausted to the outside. We did a study for propane verses electric. Heating only with propane cost 50% more than electric only. Then there's the added advantage of electric basically being endless, where propane tanks have to be refilled when empty, our dealing with the cold. We have a electric heatilator in the rv fireplace, and a oil filled radiator style electric heater midway in the rv, and a small electric heater in the bedroom... all usually keeping us warm. I say usually because when the temperature drops below the teens we supliment the early morning chill with a shot of propane heat. Ok, that takes care of the inside. Our rv has an artic insulation package which helps greatly, but you still need to keep the basement above freezing because of the plumbing pipes. This would normally be done by the propane furnace, but since we use electric heating, we use a small heater on the lowest setting in the open basement to protect the water pipes. Of course, you only need to do this if the temperature dips below freezing over night.
Next issue... The water supply via an rv drinking water hose. We use foam insulation around the hose as well as the water connection hook up. Add to this, an old rving trick is to let the water trickle a little to keep the hose from freezing. Our set up uses a "y" hose connection inside the connections in the basement, with a short drain house releasing the trickle to the outside. Turn on when temps go below freezing, off when above. At nighttime we pull down the rv shades on the windows to keep the cold from radiating via the windows to the inside. So, there y'all have it... Stay warm.
