Blueair Blue Pure 311i+ Max Genuine Replacement Filter, F3MAX+, fits Air Purifier

BLUEAIR GENUINE FILTER: For Blue Pure 311iplus Max air purifier; Blueair genuine Blue Pure F3MAXplus Replacement filter for 311iplus Max is designed for optimal performance; Not compatible with Blue Pure 311i Max or 311 Auto LET'S CLEAR THE AIR SMARTER: Get more out of your filter; Our proprietary RealTrack algorithm calculates filter lifetime based on actual usage and pollution levels and tells you when to replace within 9 months; Subscribe to save LET'S CLEAR THE AIR FASTER: HEPASilent dual filtration technology delivers more clean air faster and uses less noise and energy than HEPA filtration alone* LET'S CLEAR THE AIR BETTER: Removes at least 99.97% of tiny airborne particles like viruses and smoke down to 0.1 microns, and captures pet dander, pollen, mold allergen and dust; Carbon filter traps light household odors from smoking, pets and cooking MOST AWARDED AIR PURIFIER BRAND IN THE US: Independently tested for performance, Zero Ozone; AHAM Verifide for Performance (CADR); Quiet Mark Certified; Ozone Safety Standards Certified by CARB; Zero Ozone Verified (