I just moved my snakes into a closet, where I have a space heater with them to keep it at 80*. Before, they were in our bedroom and we had the space heater in there. It was on too much and cost an extra $60-$70 a month... Which is way too much! In the summer, I don't think I'll have a problem with the ambient temp... It gets hot here, and the sun will be hitting the wall they're by.