True HEPA filter offers a 99.97 percent minimum effectiveness at capturing airborne particles as small as 0.3 microns including dust, mold spores, pollen, cat dander and tobacco smoke. LifeTime HEPA Filter can be vacuumed. Carbon prefilter helps reduce odors and extends filter life. Air purifier reduces up to 100 percent of bacteria and germs and covers up to 168 square feet. Soft-touch electronic controls with three speeds and indicator lights. QuietCare technology provides ultra quiet operation. Design also includes a filter clean reminder and easy filter access for convenient replacement. CSA approved.