I have a heater in my garage. I looked at all the options and all of the units with combustion really need ventilation. Since it is a garage and I sometimes work on the fuel system I just could not bring myself to use a flame to heat my garage. I went with a 220 electric forced air unit. I can set the dial to a position and it heats up the garage quickly. I work in a t-shirt and jeans and I am totally comfortable.
I have been out there working in my garage while a blizzard was blowing outside.
I do have insulated garage doors, the garage walls are insulated, the ceiling is insulated and it is an attached garage. The heater never runs for more than a few minutes. I really love my heater. I love my air conditioner even more
