NuTone® ACCGSFHP2 HEPA Filter Kit, 1/4 in H x 1.67 in W x 1.67 in D, Import

Considered among the most effective filters on the market, HEPA filters with antimicrobial protection capture 99.97 % of all particles, including those as small as 0.3 microns. (1 human hair = 150 microns). HEPA filters can help reduce allergy symptoms, as well as asthma, recurring colds and persistent coughing. No wonder they're used in hospital operating rooms and other critical environments.