Your air filter needs replacing when you can no longer see through it when held up to light, when it’s been more than 60–90 days since the last change, when allergies suddenly flare up indoors, or when your HVAC system runs longer than usual to reach the thermostat setpoint. A simple monthly visual check is the easiest way to stay ahead.

Replace when

  • Can’t see light through the filter
  • It’s been 60–90 days since last change
  • Allergies suddenly flare indoors
  • HVAC runs longer than normal
  • Visible dust around supply vents
  • Filter feels heavy with debris

Set a phone reminder, or join the Mainstream Maintenance Plan for filter change reminders. We also include filter checks during every AC tune-up.