Do you enjoy the smell of fresh air and believe the air we breathe can impact our health? Improve the air quality in your home, office, or classroom with the AprilAire RF09550V Virus + Allergy + Pet True HEPA Air Purifier Replacement Filter for 9550 Portable Room Air Purifier. Capture up to 99.97% of airborne allergens and virus-size particles 0.3 microns and larger passing through the True HEPA filter, including viruses, bacteria, pet dander, pollen, mold spores, and other airborne impurities. Your AprilAire 9550 Air Purifier features an advanced 4-stage filtration system including: (stage 1) Pre-filter, (stage 2) Fine Pet Hair and Dander Trap to help reduce the airborne particulates typically shed by pets, (stage 3) True HEPA Filter to capture up to 99.97% of airborne allergens and virus-size particles 0.3 microns and larger passing through the filter, and (stage 4) an Alumina Oxide + Activated Carbon Bed Filter that helps reduce take-your-breath-away pet and cooking odors, volatile organic compounds (VOCs), and other allergens passing through the filter. The AprilAire Virus + Allergy + Pet Air Purifier Replacement Filter comes in one easy-to-install filter cartridge to save you time. By resetting the Filter Life Indicator, your AprilAire 9550 Air Purifier will notify you when it is time to order a new filter. AprilAire is Healthy Air.