garage heating

I have been using a ventless propane garage heater for about 4 years now, works great and I couldn't be happier with it. Propane is very clean burning and there is no danger as long as you mount it up on the wall, gas fumes are heavier than air. The unit I have has an O2 depletion sensor and will shut it self off if the O2 level drops below a safe level.

If anyone has one that is "spewing carbon monoxide" there is soemthing drastically wrong with it. They even heat houses with ventless propane heaters.