How often should I change my air filter at home?

change air filter

How frequently you should install new air filters can depend on the following:

  • Air filter kind
  • Complete indoor air quality
  • Number of pets
  • Household size
  • Air pollution levels and construction around the house

For basic 1"–3" air filters, manufacturers typically tell you to install new ones every 30–60 days. If you deal with from light to moderate allergies, you could get a better air filter or replace them even more often.

Or, if you reside a more remote location or less occupied house (like a vacation residence) and there are not as many cars around, yearly might be frequent enough.

Here are averages that could help you decide how frequently you should get a new air filter at your residence:

  • Vacation residence or single occupant and no pets or allergies: every 6–12 months
  • Common suburban home without pets: every 90 days
  • One dog or cat: every 60 days
  • More than one pet or if anyone has allergies: 20–45 days