Marketing InformationRheem electronic polarized-media air cleaners combine elements of both passive filters and electronic air cleaners to provide improved air quality and lower operating costs. The units install in furnaces, air handlers or return air grilles without requiring expensive ductwork modifications - perfect for add-on applications. The low-current DC power is continuously applied to the center screen within the disposable filter pad. This creates an electrostatic field between the center screen and the filter frame. Particles such as cigarette smoke, viruses, and dust entering the filter then become polarized and are drawn to the filter fibers. This polarizing field causes the smallest particles to form into larger groups that are more easily captured. Odors and gas-phase contaminants are also captured in the carbon center screen.