Will definitely remember your advice when it's time to replace my Isotherm. Meanwhile, it's a "sunk cost" as accountants say, and it works. It's not a problem I need to fix right now. If I bought an Engle that's about a boat buck, and (maybe) I'd get back $400 from selling the Isotherm on eBay. Besides, the Isotherm has a very attractive teak insert on the door face that matches the wall behind it, and it looks nice in the space.