Move to a single room, use sleeping bags and bundle up. My preferred method of heating and cooling is my portable Weber grill adapted to use 5 gallon propane bottles. CO detector and/or ventilation required.
If you have running water and a gas hot water heater, you can fill the master bed room bath tub with hot water for heat. I used that trick once in a cheap motel with no heat in freezing weather.
A Coleman stove also works if you have adequate ventilation as does a sun filled room during the day.
“If you have running water and a gas hot water heater, you can fill the master bed room bath tub with hot water for heat. I used that trick once in a cheap motel with no heat in freezing weather.”
That’s a really neat idea...I didn’t think it would buy much, but the more I think about it, the more effective it becomes. Natural gas is cheap, water heaters are fairly efficient (even the basic ones...which, by the way, are the only ones that work during a blackout), and one can crank up their temperature quite a bit (just remember to turn it down when done).