The Honeywell HRF-R3 True HEPA Replacement Filter R is fully capable of capturing an astonishing 99.97% of airborne particles at 0.3 microns from any air passing through the filter. This package includes 3 HRF-R1 Filters and is compatible with the HPA090 series, HPA100 series, HPA200 series, and HPA300 series. It is highly recommended that you change your filter annually for optimal performance. Establish an unrivaled breathing experience for you and your loved ones with Honeywell and their second to none series of Filters.