During our last month returning trip from Florida to New Jersey, I had forgotten to turn of the furnace. We hit North Carolina for a pit stop and it was 32 degrees. I walked around to check tires and such, when I suddenly was hit with a blast of hot air. It was the furnace running. I went inside to shut it down and the coach temp was 58 degrees. The heater had to be running down the highway to keep it that warm in side. Would I make it normal practice, no. The fridge on the other hand is always on going down the road. The only restrictions I have ever experienced are tunnels and the ferry boats.
*Current: 2005 Ford F350 Crew Cab Dually 6.0 diesel 4x4*
*Retired: 1987 F350 Crew Cab Dually 6.9 turbo diesel
2007 Forest River WildCat 32QBBS