Originally Posted by spritz
We leave ours in our driveway and have 30 amp service just for the MH. The propane tank only lasted a month. I bought a electric heater and plugged it in. I figured maybe 1-$200.00 for electric WRONG $552.00 for the month of Dec.
For years we just winterized our other motorhomes, locked 'em up and didn't worry about it until spring with no ill effects. Winter of '11-'12 we had a different motorhome, used the oil-filled heater but without the furnace running. Yessireee! Power company got fat off of us. We have budget billing so no big shocks until the renewal of the budget. This past winter, with this probably better designed coach, we still put the heater in the motorhome and left the furnaces set to come on at 50°. I have monitored our power bill, and it is actually using less. We are even running a credit balance on the budget billing. The winters were similar. I can only conclude that the difference is in the design purposes between the two motorhomes. We have used very little propane as well.
But, the bottom line, in answer to the original query, yes, it is okay to run the furnace/s in the winter during lay-up