Expand your clean air sanctuary with the Bionaire XL 360° True HEPA Air Purifier. The Air Quality Sensor reads the air quality around you and automatically adjusts settings to always deliver the freshest, cleanest air (when on Auto Mode). The 4-stage filtration system captures large and small pollutants. The pre-filter captures large particles such as pet hair. The True HEPA air filter purifies particles as small as 0.3 microns to remove up to 99.97percent of dust, pet dander, and more. The carbon filter eliminates unwanted odors, from cooking smells to pet odors. The ionizer helps binds small particles together, making them easier to trap in the filter, to clean help air more effectively. The Bionaire XL 360° True HEPA Air Purifier requires 2 air filters (model BAPF360).