I put an oil furnace in my shop. This is a house type unit with air conditioning. The furnace uses #2 fuel oil which is cheaper than propane. LP gas is not available here. No concerns about fumes and soot. The air conditioning maintains humidity control in our very humid southern Maryland summers. I can take the temperature down to 60 degrees or so to get extended pot life for epoxy work, then raise the temp to 90 for quicker cures. Your results may vary.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA -----