Honeywell 2 Pack of True HEPA Filters F (Replaces Filters 21500, 22500 and 23500)

The Replacement HEPA Air Purifier F Filter is certified to help capture up to 99.97% of microscopic airborne allergens and particles as small as 0.3 microns. This includes dust, pollen, pet dander, dust mite debris and smoke.

• For air purifier models 11520, 17200, 18150, 50150 (or to replace HEPA filter no. 21500).
• For air purifier models 12520, 17400 (or to replace HEPA filter no. 22500).
• For air purifier model 50200 (or to replace HEPA filter no. 23500).

HEPA Filter Replacement Guide

1. Carefully stack two HEPA filters on top of each other, so they are evenly aligned.
2. Depending on your air purifier model, you may need to use the included foam gaskets to form a tight seal within your air purifier.
3. Air purifier models 12520, 17400, and 50200 require two HEPA filters and two foam gaskets.
4. Air purifier models 11520, 17200, 18150 and 50150 require two HEPA filters but do not require any foam gaskets.
5. Optionally, if you are using a Pre-Filter, carefully wrap the black carbon Pre-Filter around the stack of two HEPA filters.
6. Place the wrapped filters into the internal chamber of the air purifier.
7. After filter replacement is finished you may reset the filter check light.

These HEPA filters should remain efective for 1-5 years, depending on the environment in which the air purifer is operating. Replace your HEPA filters every 3-5 years for light situational usage, every 2-3 years for normal seasonal usage and every year for heavy daily use.