- Compatibility Reminder: The 7700 replacement filter is specifically designed for the Blueair Protect 7700 Smart Filter, fitting models Protect 7770i and 7710i. Please verify your air purifier model prior to purchase to ensure proper compatibility. - Enhanced Air Quality: The 7770i filter features a 3-stage filtration system. Its True HEPA filtration effectively captures up to 99.97% of airborne particles down to 0.3 microns. The pre-filter is designed to trap larger particles, ensuring cleaner indoor air for your home. - Superior Odor Removal: This filter incorporates a premium activated carbon layer with evenly distributed honeycomb granules, which effectively eliminates unwanted odors. Enjoy a fresher atmosphere in your living space, enhancing your overall air quality. - Cost-Effective Solution: Each package includes one Protect 7700 replacement filter that matches the original quality at a more competitive price. Save significantly on your annual air purification expenses without sacrificing performance. - Practical Applications: Ideal for homes with pets, helping to reduce pet dander and odors. Perfect for allergy sufferers, providing relief by filtering out allergens from the air. A valuable choice for families, promoting healthier indoor air for children and adults alike.