Automobile exhaust is best left outdoors and certainly not in your garage. Vehicles pollute. Just starting your car with the garage door open can allow carbon monoxide (CO) & other chemical contaminants to enter your home.
Ensure that the air from an attached garage can’t find its way into your home:
- The garage man door into the house should have good weather stripping, its door frame sealed and a working automatic door closer.
- Common house-garage walls / ceilings should be properly sealed with no holes or gaps including any wall / ceiling penetrations for utilities.
- Don’t have heating ducts, exhaust fans, clothes dryers or the likes venting into the garage.
All of the items above leave an attached garage “open” to (and not sealed from) the rest of the house. As a result, there is the potential for dangerous CO from automobile exhaust to enter the home. This is potentially dangerous and in the worse case fatal. In addition, other by-products of combustion degrade you indoor air quality and can make you ill.
An exhaust fan in the garage that vents to the exterior of the home & garage can be effective.