Interesting to re-read this thread after all these months. I moved to a much larger shop that is poorly insulated. I spent well over $1,000 on electricity over this winter for the shop to be 50-55F. Kinda sucks. I keep eyeing wood lying around along the roads, wishing I had a wood stove in my shop. I desperately need to insulate my shop better, and put in some sort of heating system. Winter wasn't very cold, but it sucked. Summer will be desperately hot, and I have to air condition that hot box.