We are the world’s largest manufacturer of air filtration solutions. We operate production, warehousing and distribution facilities in 22 countries across four continents. With its global headquarters in Louisville, Kentucky, AAF International is committed to protecting people, processes and systems through the development and manufacturing of the highest quality air filters, filtration equipment and containment housings available today.Today, American Air Filter and AAF brands are recognized throughout the world as the most trusted brand in clean air. Our focus ranges from commercial, industrial and cleanroom air filters and gas turbine filtration and acoustical systems.