Reviving this thread with a twist.
So has anyone used a 240V heater for their insulated garage. Something in the 5000-7500 watt range. How much of a pig would it be to keep a 2 car at maybe 5-10C
I was thinking it might be an option for a guy who only wants the garage above freezing all the time and could use propane to add quick heat for a wrenching day once or twice a week.