On the current project we are building a shed that will house the water system... a 1000-gal storage tank, a 119-gal pressure tank, and the associated exposed piping. The shed is to be well insulated but the owner is concerned about the possibility of a freeze occurring when the power is out, so a cheap baseboard heater won't suffice. I can run propane to the shed and of course there are small wall heaters that would work, but I can't find a t-stat that turns on much below 45 degrees. That will waste a lot of gas. What I want is something that turns on when it gets to 32 inside the shed. Whatcha think?