Allergy Be Gone carries a wide array of Honeywell Replacement Air Purifier HEPA Filters to accommodate a large selection of Honeywell air purifiers. Each Honeywell replacement filter is certified to be 99.97 percent effective in the elimination of air particles as small as 0.3 microns. Depending on your level of usage and the environment in which you live, these filters should be replaced every one to three years. The Honeywell HRF-C1 Replacement Air Cleaner HEPA Filter can be used with the Honeywell air purifier model 16200; Vicks models V9070 and V9071; or Holmes air purifier models HAP240, HAP243, HAP244, HAP246, HAP260, HAP260B, HAP440, HAP2404, HAP2604, HAP2604B, HE3001. This particular filter requires replacing every six months or so. Whatever Honeywell air purifier you own, Allergy Be Gone has a filter to accommodate your needs, whether it requires a circular or a stackable filter. For pet dander, mold spores, pollen, dust and other allergens, the Honeywell Air Purifier HEPA Filters are sure to make your living space more breathable and free of unpleasant odors and pollutants.