The Honeywell Universal True HEPA Replacement Filter is 99.97% effective at capturing particles such as household dust, smoke, pollen, mold spores and cat dander*. This universal filter is designed to replace Honeywell True HEPA filter numbers 20500 and 20590.

• For use with Honeywell Air Purifier Model Series: 10500, 10590, 17000 and 50100
• Filters are vacuumable and should last life of unit as long as not exposed to cigarette smoke.
• For air purifier model 10500 (or HEPA filter no. 20500) two HRF-11 filters are needed
• For air purifier model 17000 (or HEPA filter no. 20500) two HRF-11 filters are needed
• For air purifier model 17005 (or HEPA filter no. 20500) two HRF-11 filters are needed
• For air purifier model 17352 (or HEPA filter no. 83154) two HRF-11 filters are needed

• Each HRF-11 contains 1 HEPA filter and 1 gasket

*from the air that passes through the filter. Overall particle reduction is dependent on many factors, including the amount of air processed, the pollutant type and the pollutants' introduction rate into the environment