We are full time in our 32rls. We did spend some time in CO at about 6,800 Ft elevation this fall with temps as low as 14 degrees. Where we were staying was a State Park and the only hookup we had was electricity. No problems with the cold. The only thing I would note is that we found that once the sun went down we closed the shades to reduce the cold radiating from all the windows and we ran the fireplace all night. We have found that there is great heat flow from the furnace to the bedroom and the bath. Not so great to the living area - this is why we ran the fireplace all night. We also changed out the floor vent in the bedroom - the original one you could not adjust, went to Lowe's and got one that you could adjust the flow on. Nice thing is that when it gets this cold at that altitude you don't have as many people around!