For years I've used a small Mr. Heater Big Buddy propane heater to heat my shop along with an electric heater when needed. It's been a good solution for most days but had a few drawbacks. Chasing propane refills can be a hassle, when we have severe weather of near 0 deg with snow and ice like last week the local suppliers can run out of propane and it can be fairly slow at getting up to a comfortable temp when it's really cold outside. Plus the electric heaters are a big drain on my shop power and can lead to tripping breakers when I power up another machine. I decided to install a diesel heater in my shop and so far it seems to be going well. Time will tell. It did mean another hole in my shop wall for the exhaust and finding a place for it in my small shop wasn't easy. I'm hoping it will give me a better and more efficient way of keeping the shop warm, especially when we get long periods of well below freezing temps with wind chill below 0. Not sure if anyone else uses one for their shop but for the price it seemed worth a shot. My tractor runs on diesel so I usually have plenty on hand.