When I converted my small barn into a workshop I decided that it was going to have some form of heating. It needed to be cheap to install and run so I built a waste oil burner. It certainly does the job and costs next to nothing to run. The only expense was for the flue. If anyone wants to heat their workshop then I would recommend an oil burner. Anyone wanting help with the subject I am happy to give you the benefit of my experience and build details.