95% efficient HEPA-type filter helps capture common airborne particles that are 2 Microns or larger, such as dust, pollen, tobacco smoke, cat dander, and mold spores. Filter should be replaced approximately every 6 months. Fits Honeywell Hepa Clean models: 16200, HHT-011, HHT-080, HHT-081, HHT-090, HHT-145, HHT-149, HHT-085. Also fits air cleaner models: Vicks V9070 and V9071, also fits Holmes air purifiers models No. HAP240, HAP243, HAP2404, HAP2400, HAP412, HAP422, HAP424, HAP242. Tower Air Purifiers require 2 filters.