Enviracaire SilentComfort Three-Speed HEPA Air Cleaner, 225 sq.ft. room capacity

No-Draft ™ technology provides efficient air cleaning without cool air exhaust draft. Features two filtration systems; a true HEPA ™ filter, removing 99.97% of airborne particles as small as 0.3 microns, & an activated carbon pre-filter, to diminish common household odors. Intelli-Check ™ filter change indicator. Includes two non-permanent HEPA ™ filters & one activated carbon pre-filter. Three speeds. Air Cleaner Machine Type: HEPA; CADR: 150; Maximum Room Size (Square Footage): 225 sq. ft.