not sure??

[bogie346]

Hello airstreamers. I have a 1975, 31' landyatch sitting in a campground in western north carolina. The temps have been hitting the low 20's & some high teens and this is only december. My question which I haven't found in any of the posts is this. I am running a great little ceramic standup heater which keeps the entire cab quite comfortable at around 62 degrees. I have the themostat, located in the rear bedroom, set for 55 degrees which runs the suburban furnance. If the cab is staying at a bearable temp. and doesn't allow the furnance to kick-on, I assume that the temp in the belly (water holding tanks) has to be much lower than that in the cab. Thus, I believe my tanks may not be getting sufficient heat to keep them from freezing? I have been running the furnance, anyhow, to make certain they do not freeze. The cost and amount of propane use, however, is mounting up! Your comments/suggestions are surely welcome. Jim