Maintenance guide

How often to replace an HVAC air filter.

Check monthly during heavy use and replace most filters every 1-3 months, depending on dust, pets, filter type, and system runtime.

5-15 min$8-35Beginner

Safe order

  1. 1Turn the thermostat off before removing the filter.
  2. 2Read the filter size printed on the old filter edge.
  3. 3Match the airflow arrow toward the blower or duct airflow.
  4. 4Slide the new filter in gently without bending it.
  5. 5Write the date on the filter edge and set a reminder.

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