When was the last time you inspected or replaced the air filter on your home's heating, ventilation and air conditioning (HVAC) system?
If you can't remember, it's probably time to take a closer look. The U.S. Department of Energy advises checking your air filter once a month and replacing it at least every three months—sooner if you have pets or smokers in the home.
Successful filters have a short lifespan. The better a filter catches dirt, the faster it gets clogged. Clogged filters make your HVAC system work harder, shortening its lifespan and adding as much as $82 to your annual electric bill.
Turn your system off before checking the filter. Slide the filter out of your ductwork, and look for layers of hair and dirt. Run a finger across the filter. If there's a line left on the surface, it's time for a change. When installing a new filter, make sure the arrow indicating the direction of airflow points toward the blower motor. To help you remember monthly checkups, write the date on the side of the filter so you know when it needs to be replaced.
Once you've made the change, turn everything back on and breathe easier knowing you just saved yourself a few bucks and extended the life of your HVAC system.