Do you have a close air rack? Where do you put the foam insulation ? My snake room is about 70 as well, but it is very small. My space heater gets it up to 75 within an hour even in the morning. So I am not sure whether to go with a close air rack from AP or the economy Sterilite racks, but those dont have a back or side wall. Ive heard they dont hold humidity or temps as well as the ones with solid walls.