[Motor31]

Check under the kitchen slide on the outside of the rig. You should find some notches cut in the seal there that allow free flow of air in 3 to 4 places.

You might also want to check for compressed and leaking gaskets around the doors in the basement area. Definitely check for duct leaks or disconnects.

Check your windows for dirt and debris in the gasket areas. I found that the windows didn't seal. They may be double pane but the wind sails right on through if there is any dirt in the gasket area. Even the vertical sliding windows leak air badly.

We also use a small space heater in the bedroom at night and turn the furnace down to about 60 and close the door to the bedroom. During the day we'll turn it up to 68 or 70 but we also get a lot of sun heating to help out. If it's really cold outside we bring the space heater into the front room.

If you are stationary for the winter skirt the rig to slow or stop the flow of air underneath. At the same time getting a larger tank (200 gallon) would be a good idea.