About this item BLUEAIR’S TOP-PERFORMING AIR PURIFIER LINE: Blue family’s new Pure Max series with our proprietary HEPASilent performance now even better with up to 83% faster cleaning and 50% less noise* LET’S CLEAR THE AIR QUIETER: Quiet Mark certified (23-53dB); Cleans up to 1,524sqft XL space in 30min or 635sqft extra-large room in about 12.5min on high 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*** LET’S CLEAR THE AIR SMARTER: Blueair smart air purifier app scheduling, air quality monitoring, Clean Air ETA, Welcome Home geofencing and RealTrack accurate 6–9 month filter tracking technology are customizable features; Alexa voice control available LET’S CLEAR THE AIR EASIER: Intuitive LED display, advanced pollution (PM1, PM2.5, PM10) sensor, real-time indoor readings, 5-color AQI and two-button design make it easy to control fan speed 1 – 4 including night mode, auto, brightness and child lock BLUEAIR REPLACEMENT FILTER: Blue Pure 211i Max Genuine Replacement Filter; Blue Pure F2MAX B08KPHRLXR fits Blue Pure 211i Max Air Purifier and is designed for optimal performance