garage heating

Something nobody else mentioned, insulaton is VERY important! If you insulate your walls, ceiling and glue some styrofoam to the garage door panels, you will be able to heat the space better. Just remember, it a few days to heat the garage to 65f from 20f, the less drafts and times the door opens, the better. Here in texas, a single 1500 watt oil/electric radiator keep the garage 70f at night. It is important to me because I am doing a lot of painting lately so I need to keep the temp up and air dry.