PERMAtechå¨ filter never needs replacement and is easy to clean. HEPAã¢-type filtration removes up to 99% of airborne particles as small as two microns. Three speed settings, optional ionizer and filter service indicator. Remote control, slim tower design, and quiet operation. Air Cleaner Machine Type: HEPA; CADR: 116; Maximum Room Size (Square Footage): 180 sq. ft.; Maximum Room Size: 12 ft. x 15 ft.