Thanks so much for the quick reply! I'll definitely give that a shot. You sound very knowledgeable, so I hope you don't mind if I ask another question? I just got a CHE connected to a stat today after using a space heater for a day and I was wondering where to put that probe. In my other post I was warned against putting stat probes in the tub itself, but I am using the CHE to keep up the ambient temp so I'm wondering what might be the best way of doing that. Thanks again!