About HET Filter - HET Filter GmbH develops, manufactures, sells and installs high-quality filter systems. Our experienced team of sales engineers, project managers and service technicians design and implement custom solutions specific to each customers’ requirements. HET Filters also produces its own filter elements, which undergo rigorous testing, before being shipped around the world. HET Filter is headquartered in Altenstadt (Germany) and conveniently located in the metropolitan area of Frankfurt am Main.