I hate that on the packaging the UTH's say "Keeps temps around 5 degrees warmer than ambient." That's a crock of poo. My UTH (when tested on an empty tub) ran my "warm side" just south of 125. My room runs at 71 with about 40% natural humidity. No way those things run just "5 deg" over the ambient.
i do believe it means that the temp of the uth itself is 5 degrees hotter than the ambient temp it creates.
