How often should I change my air filter at home?

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

  • the type of air filter you are using
  • the overall indoor air quality
  • how many pets are in the home
  • the number of people occupying the home, and
  • the level of air pollution and construction around the home

For basic 1"-3" air filters, manufacturers usually direct you to change them every 30-60 days. If you suffer from light to moderate allergies, you could upgrade the air filter or change them [even more often|more frequently|every few weeks]3]. Or, if you're in a more remote area or less occupied home (like a vacation home) and there are fewer cars around, annually may be often enough.

Here are some general guidelines to know how often you should change the air filter at home:

  • Vacation home or single occupant and no pets or allergies: every 6-12 months
  • "Average" suburban home without pets: every 90 days
  • Add a dog or cat: every 60 days
  • Add more than one pet or anyone has allergies: 20-45 days