I've always had to use those smelly kerosene Reddy heaters to keep my shop warm in the winter......not so now. I went down to the local Tractor Supply store and bought a propane fired radiant heat source a few days ago. My shop is 32 x 48 but sectioned to a 32 x 32 pretty well insulated area. The heater puts out 28,000 btu's which seems fine for the size I'm heating.
It sure is nice to go out in a warm shop now that doesn't stink of kerosene fumes.