Air purifier with three speeds incorporates patented airflow technology with sound-reducing features for 30 percent quieter high-speed operation. 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 permanent filter can be vacuumed. Carbon prefilter helps reduce odors and extend filter life. Air purifier covers a room up to 14' x 14'. QuietCare technology provides ultra-quiet operation. Design also includes soft-touch electronic controls, indicator lights, a clean filter reminder and easy filter access for convenient replacement. Certified by the Association of Home Appliance Manufacturers.