When To Change Your Air Filters

Debbie Henry - Tuesday, November 13, 2012

Changing return air filters is crucial to the proper performance of an HVAC system, resulting in a more efficient system and lower bills.

Did you know 20% of all HVAC service calls can be traced back to dirty air filters?

 So.....When do I change my air filters?

Simple, when they're dirty. 

How often to change your air filters can depend on several factors:

  • the type of air filter you are using
  • the overall air quality of your home
  • pets, pets, pets..
  • occupancy of the home
  • the level of air pollution and construction around the home

For your standard 1"-3" air filters, the manufacturers basically tell you to change them every 30-60 days, which is actually a great rule of thumb. But general rules aren't always for everybody. If you suffer from light to moderate allergies, you could upgrade the air filter or change them even more often. Why do pets matter so much? They have a tendency to shed, which can clog your air filter quick and with great success. Of course the air filter is just doing its job by capturing pet hair and dander, but extremely dirty filters can cause extremely weak HVAC performance.

Quick Guideline:

  • "Average" suburban home w/o pets: every 90 days, (change when the seasons change)
  • Add a dog or cat: every 60 days
  • Add more than one pet or have allergies: 30-45 days