I learned a lot about my house last year. No insulation in any part of the house. Last year was an unusually cold winter for where I live. I am looking at options to heat the room with and have to use space heaters. Each electrical zone will only support 1 heater. Will be closing off bedrooms and only heating main part of the house. All but one of my snakes are in the living room at this point. I have also been thinking about other options to heat the areas where they enclosures are. Originally thought about draping a large electric blanket, regulated with thermostat, over Rainbow's large enclosure to help her. Don't like the idea because Electric blankets are dangerous and fail often. I have 1 120W heat panel taking care of ambient temps in the big part and a 40W in her cave. Not sure that will be enough but hope so. My other enclosures have been steady keeping temps with the AC keeping the house between 70F-75F room temps. I am just worried that they will drop as room temps drop to <50F. I have 3 space heaters but going to upgrade them. Looking fur suggestions on good heating for the entire room. Quality, reliability, and affordability. All have to be considered. Last year was around 40F in the house at the worst point with outside below freezing for a couple of weeks. Might try using foam to insulate and see if that works as well.