Blueair Blue Pure 311 Auto Medium Room Air Purifier with Auto Mode for Allergies, Pollen, Dust Smoke, Pet Dander, Viruses And Bacteria with HEPASilent Technology and Washable Pre-Filter

* Recommended for medium rooms, completely filters air in master bedroom, living room or playroom about every 12 mins (5x an hour at 388 square feet) on high​ * Intuitive Auto mode, automatically adjusts to real-time conditions reported by the particle sensor to maintain a comfortable home environment​ * Combination filter, carbon traps light odors, HEPASilent technology removes 99.97 percentage of airborne particles down to 0.1 micron, like pollen, dust, and viruses​ * Low noise and energy, Cleans the air with noise levels equivalent to a soft whisper on low (23-53 dB) * Customize freely, washable fabric pre-filter in Arctic Trail (gray) included, Additional pre-filter colors inspired by Scandinavian nature sold separately​ * Regulatory Model Number 3431101000