[a10t2]

So, basically make sure there's plenty of ventilation, and use a CO detector.

Garage is an attached three car with a window and back door, so ventilation won't be a problem. I've already got a couple fire extinguishers out there, since I do auto work out there those aren't optional.

I'd guess you'll be fine. I'm brewing in my attached greenhouse, which isn't much bigger than a one-car garage. I open the window and the window in the screen door (not even the door itself) and the meter has never even chirped.

[jtoots]

I might be sensitive and/or my burner might not be efficient, because I can't get away with this... I feel pretty crummy, light headed dizzyish when I burn in the garage.  Outdoors for me, it's usually more enjoyable out there anyway!

[Phil_M]

Well I scored a used brewing sculpture for a price that was too good to pass up. Since it has wheels, I don't intend to brew in the garage. Any vapors, and sticky messes, will be out in the driveway.