How to Prevent an Attached Garage from Polluting Your Home


Air conditioning and heating are inexorably tied to air quality. Many Valley homes have an attached garage, which is tremendously convenient in our hot, Phoenix weather. An attached garage also increases security and provides the convenience of fewer steps when loading and unloading the car.

However, if you have an attached garage, you may want to consider the air pollutants which can potentially enter your home and lower the air quality. The car itself in an attached garage affects air quality in the house unless measures are taken to prevent it. In fact, some homeowners with CO2 detectors and attached garages report that the CO2 alarm can be triggered by air entering the home through the attached garage door.  So today, we’re going to review some options for preventing garage toxins from entering your home.

An exhaust fan


An exhaust fan will pull the toxic air out of the garage. It can be something of the size of a bathroom of kitchen exhaust fan. Since it creates suction, air from your home is more likely to be sucked into your garage than the other way around. Any plug-in appliance such as an exhaust fan can now be a Smart appliance, which can be controlled with a cell phone. Consider turning the exhaust fan on before you walk out to the garage to create a vacuum. The air from your home will then be sucked into the garage rather than the air from the garage entering your home. Reverse the process when you return home in the car.

Minimize exhaust

Don’t run the car in the garage any longer than necessary. If you don’t have an exhaust fan, open the garage door before starting the car and wait a few seconds after you shut the car off before closing the garage door to allow exhaust fumes a chance to escape. Minimizing exhaust will minimize the amount of benzene (pollution from exhaust) that can enter your home.


Taped drywall and paint will also help control particulates from migrating from and adhering to the garage walls, so finish the garage as soon as possible. One thing you should be on the alert for: some of the older homes may be connected to the central HVAC system. A garage which shares an HVAC with the house isn’t legal anymore, so if you discover this, make sure to block it off. The fumes from your garage can enter your home through a vent or the HVAC ductwork.  

 Reminder of a special event

The American Lung Association is sponsoring Lung Force Walk, a fundraising effort which will be held on November 18th at the Mesa Riverview Park at 8 am.

You can register here. Participants who register now and make a $33 self-donation will receive a gift.

If you need refrigeration or heating service in your Phoenix area home, call All-Temp Refrigeration and Heating at 480-376-7548