Steaming up your shop like a wet basement is annoying, sure, but is it really that big a deal? You dropped $260 at a supply show, which is basically the place where people buy stuff they don't need because the booth had free coffee. A hot towel cabinet is meant to hold already-hot towels, not heat your whole room. If it's fogging your windows, just crack a door or run a fan for ten minutes. Worst case you got a fancy towel warmer and a free sauna for your shop.