The HEPA Air Cleaner has been designed to remove particulate such as atmospheric and household dust, coal dust, insecticide dust, mites, pollen, mold spores, fungi, bacteria, viruses, pet dander, cooking smoke and grease, tobacco smoke and more. It also removes odor with the Carbon Prefilter. Benefits:- · Helps provide relief from allergies, asthma, and other respiratory illness. · Helps reduce housekeeping time and redecorating costs. · Helps provide a healthier, more comfortable environment, year-round. How It Works:- Millions of airborne pollutants are carried through the return air ducts of the heating/cooling system. HEPA Air FiltrationSystems has been designed to be ducted to the return air duct. A portion of this return air is bypassed through an 8 inch intake duct on the top of the unit and passes through a 2-stage filtr...