I have all sides except the front of course covered in 1/2" foam insulation board and an opening on the top for a CHE. I'm also using a UTH. All heat sources are regulated. Temps are 88 and 78. If I put it all the way to 90% it drops down to the 70-75 range within an hour then slowly drops over the course of several hours. Once it gets below 60 the moisture gets burned off pretty fast.