As air passes through the electrostatically charged filter, the oppositely charged air particles are attracted to the filter media and are trapped.
MERV Rating These electrostatic filters are rated according to MERV, which is the minimum efficiency reporting value, which is the scale designed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) to rate the effectiveness of air filters.), as well as sm The carbon filters trap common household odors (i. The MERV 8 and MERV 11 filters remove particulates like dust mites, mold spores, pet dander, pollen, tobacco smoke, and bacteria; the MERV 13 removes the same particulates, but it also removes some viruses.