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: Blue Pure 511i Max operates on low at 19 db and is never louder than 48 db. With lowest fan speed and fully dimmed lights, Blue Pure 511i Max cleans your air without keeping you up at night with Night mode. 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** Cleans up to 465sqft living space in 30min or 193 sqft in about 12.5min on high 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 smoke, 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 display, 5-color AQI, and simple two-button design make it easy to control fan speed 1 – 3 including night mode, auto mode and child lock MULTIPLE FILTER OPTIONS: 3 customized replacement filters for 511i Max. F5MAX Original Particle & Carbon Filter (B08KPJG1HS), F5MAX SmokeBlock Filter(B08KQLZXKF), and F5MAX AllergenBlock Filter(B08KQJBPQ2) Show More