Experience cleaner air with the Blueair genuine air purifier filter replacement designed for the Blue Pure 211i Max air purifier. This authentic Blueair replacement filter delivers exceptional performance through advanced HEPASilent dual filtration technology, combining mechanical and electrostatic filtration to capture airborne contaminants more efficiently than traditional HEPA filters alone. The air filter removes at least 99.97% of microscopic particles down to 0.1 microns, including viruses, smoke, pet dander, pollen, mold allergens, and dust. The integrated activated carbon filter component effectively traps light household odors from cooking, pets, and smoking. Designed specifcally for the Blue Pure 211i Max HEPASilent Air Purifier, this air filter for air purifier fits seamlessly into your Blue Pure 211i Max unit. Blueair's proprietary RealTrack algorithm intelligently monitors your filter's performance based on actual usage patterns and pollution levels. This smart technology calculates optimal replacement timing within a 9-month period, maximizing air purifier filter efficiency while ensuring consistent air quality. The system alerts you when it's time for your next air purifier filter replacement. This hepa air purifier filter represents the most awarded air purifier brand in the United States, backed by rigorous independent testing and multiple certifications. The filter meets AHAM Verifide performance standards, carries Quiet Mark certification for low noise operation, and is CARB certified for ozone safety standards with zero ozone emissions below 5 ppb. Installation is straightforward - simply remove the old air filter and insert this genuine Blueair filter into your 211i max air purifier. Regular replacement every 6-9 months maintains optimal performance. This blue air filter replacement is exclusively compatible with the Blue Pure 211i Max model and not suitable for Blue Pure 211 plus Max or 211 Auto units. The air filter removes at least 99.97% of microscopic particles down to 0.1 microns, including viruses, smoke, pet dander, pollen, mold allergens, and dust. The integrated activated carbon filter component effectively traps light household odors from cooking, pets, and smoking. Designed specifcally for the Blue Pure 211i Max HEPASilent Air Purifier, this air filter for air purifier fits seamlessly into your Blue Pure 211i Max unit. Blueair's proprietary RealTrack algorithm intelligently monitors your filter's performance based on actual usage patterns and pollution levels. This smart technology calculates optimal replacement timing within a 9-month period, maximizing air purifier filter efficiency while ensuring consistent air quality. The system alerts you when it's time for your next air purifier filter replacement. This hepa air purifier filter represents the most awarded air purifier brand in the United States, backed by rigorous independent testing and multiple certifications. The filter meets AHAM Verifide performance standards, carries Quiet Mark certification for low noise operation, and is CARB certified for ozone safety standards with zero ozone emissions below 5 ppb. Installation is straightforward - simply remove the old air filter and insert this genuine Blueair filter into your 211i max air purifier. Regular replacement every 6-9 months maintains optimal performance. This blue air filter replacement is exclusively compatible with the Blue Pure 311i Max model and not suitable for Blue Pure 211 plus Max or 211 Auto units. 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 on auto-delivered air purifier filter replacement. *When similar CADR was measured, Blueair models with mechanical and electrostatic filtration achieved less noise with less energy than same models with only H13 HEPA mechanical filtration. **Tested PM 2.5 (0.1 - 2.5 microns) up to 90min in a 30m3 room. Tested to remove min. 99.9% of S. aureus, K. pneumoniae, P. aeruginosa, MS2, E.Coli, H1N1, A.Niger. ***Based on a survey of over 50 awards, accolades, and recommendations issued by independent consumer associations, media publications, and industry competitions from January 1, 2022, through January 31st, 2023, for products sold in the US by top 10 air purifier brands according to NPD Group Retail Tracking Service, Small Appliances, U.S. sales dollars Jan – Dec 2022.