GypsmJim
Member
- Joined
- Oct 16, 2009
- Messages
- 4,078
- Reaction score
- 7,180
Google says exactly that also.
However, building codes require (in Ohio) that in a garage connected to a dwelling, the garage floor must be 4" lower at any doorway into the dwelling (some cities require 12"). It may be associated water vapor, but something make the combustion fumes heavier than air at our altitude. That may be because Air is 79% nitrogen and only 20.9 % oxygen. The real world isn't composed of pure anything. Fire fumes are hot so they rise (which is why smoke detectors are on the ceiling) and most fumes from hot water tanks and furnaces are too. But fumes from pilot lights will sink to floor level due to less heat. 95% efficacy furnaces don't have enough heat left in the fumes to make them rise, so there is an exhaust fan to move those fumes outside. Why because they will fall to the lower areas and that will kill you.
Ivan
Garages sometimes house cars, thus a gasoline leak is a potential problem. Gas fumes are heavier than air. You don't want a gas fume to enter the kitchen and come into contact with the stove.