We are in NC and will be leaving for FL sometime around Christmas. Our forecast is for some mid 20 degree weather next week. If I run the furnace during these cold days will that eliminate my freeze ...
I didn't notice if you mentioned what type of heater you have. If it's an Aqua Hot you will need to do nothing but disconnect you water hose. The 20's for a few hours overnight is a non-issue is a good MH. Just the act of living in it will keep the lines safe.
We've been in ours when the overnight temps dropped into the teens without an issue. Also of note is that the inverter/charger puts out a lot of heat in it's own right.