A little more about the enclosure and exactly where and how you are checking the UTH temp. Some of the ones I read about would have a tough time heating a wood surface up to 90 degrees if they are installed underneath and not in the enclosure. Especially if it is thicker wood. Some people set the thermostat at 90 degrees and assume that's what it is at. In my glass enclosure I have the temp set at around 94 degrees in order to jeep the inside floor temp at 89 degrees with the temp gun.