I have an attached 60 x 26 insulated garage with 9' ceiling. I have an electric heater that is ceiling mounted currently that is 10 years old and it doesn't seem to put out as much heat anymore. I would like a unit that has an electric plug that I could just plug in instead of having separate wiring done back into the ceiling. I have two breaker boxes and there is a circuit that the is labeled "garage heater" and it has two 30 amp breakers. I assume that circuit should be adequate for the ceiling electric furnace? So does someone have a suggestion for a ceiling mounted furnace? Do any of them come with a plug to simply plug in or do most require some wiring?