To save on my heating bill, should I keep all of the doors shut to all of the rooms or keep them open? I live in a double wide.
If you are looking to save on your heating bill you should shut all doors. I would also invest in a room heater so that you can heat one room at a time. You will see a huge drop in your heating bill if you do this.
Shut all the doors..
I'd shut the doors and the heater vents in those rooms as well