McMasters Koss, 4224 Normandy Ct, Royal Oak, MI 48073, US

Established in 1968, RSE Incorporated is one of the oldest activated carbon filter manufacturers in North America. The firm specializes in catering to the needs of the activated carbon filtration market. It manufactures products such as front/side access systems, media modules, disposable panels, panel filters, filtration media and plastic. The firm serves sectors, including office buildings, hospitals, airports, schools, libraries, industrial plants and social halls. RSE Incorporated markets it products throughout the United States, Canada and many other countries.