Filter life depends entirely on usage and air quality. Follow this checklist.
- Pre-Filter (Carbon): Check every 3 months. Replace if visibly darkened or if odors are no longer reduced. In high-smoke or high-odor environments, replace more frequently.
- True HEPA Filter: Check every 12 months under normal conditions. Replace sooner if airflow seems significantly reduced, the unit runs constantly, or you see excessive dust buildup on the filter surface.
- Key Indicators for Early Replacement: Increased noise from the motor (straining), reduced airflow from the outlet, or a decline in perceived air quality (more sneezing, noticeable odors).
IF THAT DIDN'T WORK: If you've replaced the filters and performance is still poor, ensure you purchased the correct OEM replacement filters (Honeywell HRF-APP1 or HRF-AP1). Non-OEM filters may not seal correctly.
HEADS UP: Never run the unit without filters installed. It can damage the motor and blow dust back into the room.