QuFresh's tower HEPA air purifier gives you confidence in your air quality in home and commercial environments such as large living rooms, family or game rooms, entertaining areas, offices, studios, gyms, dorms and classrooms up to 1,227 sq. ft. This large air purifier has dual filter panels on both sides and a powerful fan for greater filtration potential using pre-filter screens and composite HEPA H11 and activated carbon filters to capture airborne impurities down to 0.3 microns in size with 99.97% effectiveness. Choose between 3 speeds or an automatic setting, as well as a timer function and child lock to keep your settings safe around children, and monitor your air quality at any time using the unit's onboard air quality indicator panel. This portable air cleaner arrives fully assembled with four caster wheels at the bottom to make this air purifier easy to move and fit into any room.