Bringing this back to life. Per the discussion on the other thread, have my garage poorly figured out but my shed (& hopefully future shop) is a challenge.
I'm still on an extension cord and when proper electricity is run, it'll be 120/240 w/30A. This could give way to scalable 100A down the road. For now, electric heat simply isn't an option so I've been using a 12Kbtu propane radiant heater that only works well when I'm ~3' in front of it. With 12' walls and just enough attic flooring to allow heat to pass the joists all the way to the peak, I fear anything that isn't forced air will disappoint. Further skating the line is I counted 15 engines in the shed with at least a dozen of them having some gasoline with them. I do pride myself on an above average sniffer and this time of year doesn't typically generate a bunch of evaporative emissions but what I might not be able to smell can still be dangerous and I'm quite aware of that.