For my boa, and he is in a rubber maid right now, I have a heat pad under the warm side, and a heat emitter on the warm side also, the heat pad just does not cut it by itself. But with my set up, I get temps of 90-95 on the hot side, and 78-85 on the cool side. Even at night, and my house is super cold cause it is way old, like built in the early 1900's, with very little improvements. How many holes do you have in your rubber maid, can ya cover a few, that may help keep in heat.