F HRF-F1, Filter, Replacement HEPA Air 1 Purifier Pack Honeywell Filter,

To ensure stated product performance, use only Certified Honeywell Replacement Filters  Replacement Filter F   Captures up to 99.97% of airborne particles at 0.3 microns   Package contains 1 filter  Filters should be replaced every 1-5 years depending on use  For air purifier models 11520,17200,18150,50150 (or HEPA filter no. 21500) two HRF-F1 filters are needed  For use with Honeywell Air Purifier Model Series: 11520, 12520, 13520, 17200, 18150, 17400, 50150, 50200, 50250, 50300  For air purifier models 12520, 17400 (or HEPA filter no. 22500) two HRF-F1 filters are needed  For air purifier models 13520,50250 (or HEPA filter no. 24000) three HRF-F1 filters are needed  For air purifier model 50200 (or HEPA filter no. 23500) two HRF-F1 filters are needed  For air purifier model 50300 (or HEPA filter no. 29500) four HRF-F1 filters are needed  Each HRF-F1 contains 1 HEPA filter and 1 gasket