I'm in Michigan and it is mighty cold here. I just bought a propane heater at Lowes for $89. It puts out 80,000 BTU's takes the garage from 40 to over 60 in 10 min. When I epoxy I plan to turn it way down after heating to temp so it will cool slowly. slowly droping temps seem to help keep out those pesky air bubbles as epoxy cures. Oh almost forgot the heater hooks up to a 20 lb tank like your gas grill. = cheap and lots of heat