Honeywell Universal True HEPA Air Purifier Filter

Honeywell Universal True HEPA replacement filter is 99.97% effective at capturing particles such as household dust, smoke, pollen, mold spores, and cat dander. Filters should be replaced every 1 to 5 years depending on use. Designed to replace the following Honeywell True HEPA filters: HRF-14, 21500, 22500, 24000, 23500, and 29500. For air purifier Model No. 11520, 12520, 17200, 17400, 18150, 50150, 50200 - 2 each of Model No. HRF-F1 filters are needed. For air purifier Model No. 13520, 50250 - 3 each of Model No. HRF-F1 filters are needed. For air purifier Model No. 50300 - 4 each of Model No. HRF-F1 filters are needed. Each Model No. HRF-F1 contains 1 HEPA filter and 1 gasket.