I use nothing to heat the room at all. I live in south Florida and its 65 out right now, 91 in the room with the window open and two fans on high,plus a ceiling fan. My house has 3 people in it, and it is small, so it is very cramped. My herp room is my bedroom. I only have chameleons,tortoises, and aquatic turtles at the time, so CHE's, Basking bulbs, and uvbs. These are controlled on timers.