Thank You very Much, I just got this Heater from a friend for $50.00 and it looks like Brand New. Hooked it up in my 22' X 22' attached insulated garage and it heats it great. I was going to put a disconnect in the 10 AWG wire going to the heater since it doesnt actually have an Off switch/setting. Any other recommendations. I guess the LOW setting would just keep it above freezing?