Setec Astronomy
Well-known member
I don't think 20 minutes is going to give you very much....better plan on a couple of hours to warm it up in there with the electric heater. I would have to agree the torpedo heater would be great, cheaper and faster, not sure about the setting the place on fire or the asphyxiation issues. I know we have a propane fork lift at work, and the fumes aren't bad, but that's a bigger space and prolly less BTU's.