During the winter I would like to work on some of my small tractor/farm projects in the garage. One wall is shared with the house. The ceiling and walls are insulated. The ceiling is 8 foot from the floor. Anyone have any experience with these natural gas units - Mister Heater brand or the Modine Hot Dawg brand? I think 50,000 BTU's is adequate. I got a quote from a heating/plumbing company and it was $4000. I don't think I want to spend $4000 to heat my garage. The was for a 50,000 BTU furnace, flue, and running the gas. I will get some other bids. What about the 5000 or 7500 watt electic hanging heaters? I do have a primary fuse panel in the garage. Would I be happy with one of them and not have to worry about a flue or running a gas line? Also, I do not want to burn wood. Any ideas appreciated.