I've been kicking around the option of heating my attached, 2-car garage cheaply, knowing that it doesn't get too cold...but would make working/washing cars a lot easier. I'm not expecting 80+ degrees, but if it was warm enough to dry water after I washed a salty car in Optimum No-Rinse, that would be huge. Let alone not having achy joints from working on cold metal and lying on an icy concrete floor!
For reference:
Propane Tank-Top: cheap, but 30k BTUs and not much propane used.
http://www.harborfreight.com/30000-btu-tank-top-propane-heater-67856.html
Natural Gas heater (wall/ceiling mount): great heat, permanent solution. Pricy unit and running natural gas line out to garage will be EXPENSIVE.
Electric ceiling mount: not cheap, but permanent and simple garage heating solution.
http://www.homedepot.com/p/NewAir-17-060-BTU-5000-Watt-Electric-Garage-Heater-G73/205588544#customer_reviews
Parabolic heater: very cheap, but only localized heating. Get a couple?
http://www.harborfreight.com/400900-watt-oscillating-parabolic-heater-62313.html
Please vote and add your comments. Thank you!