dragonboy?!?
I have heard of this thermostat before, while I am sure its not safe or powerful enough for rack use it seems like it would be good choice for a UTH. Definitely a step up form a rheostat I think. But I have no first have experience with this particular thermostat but there seems to be some reviews for it on Amazon:http://www.amazon.com/Hydrofarm-MTPR...0373151&sr=8-2