I have never heard of doing anything along those lines. I would assume that it would be very similar to a johnson or ranco that are designed for industrial uses. The question is why? There are systems proven to work and in some cases designed for that exact task. Why risk fire and injury for no reason? I am not much of a fan of off/on type but the hydrofarm if you don't need tons of power is 29.53 at amazon a household t-stat isn't cheaper so why bother?