Hello Kip! If your room is coldest in house (mine is too) the DeLonghi HMP1500 Mica Panel heater works great in matching my room or even making it warmer than rest of house. Covering most of top screen with aluminum foil will definitely help hold heat and raise the humidity in any enclosure and will be fine with RBTs. Only time when you can't use that trick is when dealing with low humidity frogs like some tree frogs. Good luck !