This Honeywell HEPA Air Filter For Air Purifier R helps capture 99.97% of the following airborne allergens and particles: dust, pollen, pet dander, dust mite debris and smoke. It’s important to replace Certified HEPA air filters 1x per year for consistent indoor air purification. This Honeywell R Filter is designed to fit Honeywell HEPA console air purifiers. Honeywell filters will circulate air up to 4.8 times an hour for air filtration. If you have pets or stale indoor air, HEPA air purifiers for home help deliver cleaner, fresher air while helping reduce odors. These HEPA air filters for home help capture odors, allergens and particles. This Honeywell HEPA filter replacement pack is for allergy sufferers, pet owners, homeowners, and those wanting cleaner air during allergy season. Other HEPA replacement filter options are not guaranteed to offer the same performance. From the air that passes through the air purifier replacement filter, 0.3 microns and larger. Based on 3rd party independent CADR testing for the smoke CADR value when operated at the highest level. Air circulation depends on many factors, like room size and configuration. There is no guarantee that all the air in a room will pass through filter.