Holmes aer1 True HEPA Allergen Remover filters are designed to capture up to 99.97% of airborne allergens and pollutants, including pollen, mold spores, and pet dander. This 2-pack of Type D filters is compatible with all aer1 ready air purifiers from Holmes and Bionaire. These high-efficiency filters help reduce coughing and sneezing by trapping particles as small as 0.3 microns. For optimal performance, it is recommended to replace these filters every 12 months. Brand: Holmes Model: HAPF300AHD Type: HEPA Filter Compatibility: aer1 Ready Purifiers Filter Type: D Quantity: 2-Pack Efficiency: 99.97% Particle Size: 0.3 Microns Function: Allergen Remover Lifespan: 12 Months Material: HEPA Media Color: White/Green MPN: 198668 Keywords: Air Purifier, Replacement Filter, Dust Removal, Pollen Filter, Home Maintenance, Bionaire Compatible, Clean Air, Allergy Relief, HVAC, Indoor Air Quality Thank you for shopping FrankDealz.