CO2 is heavier than air. If you use ANY heater with a flame, make sure you crack the garage door so it can escape. The CO produced is slightly lighter than air.
For me, in view of the gasses that are given off by resins, cleaners, and paints that would be burned, producing other noxious fumes, I'd try to limit my exposure. An electric heater, or a gas one that vents through the wall would be the best way to go, if there's going to ne any long term usage. Remember, you're already breathing chemicals on building your plane, please don't make it worse. Your mileage may vary as to your solution. Dan Branstrom
