DuctSox® Corporation, headquartered in Dubuque, Iowa, is a manufacturer of custom engineered commercial and industrial air di ... spersion products for open ceiling architecture, critical environments, and underfloor applications. DuctSox is a proven leader in the HVAC industry with its products accepted within key industry organizations such as ASHRAE, Underwriters Laboratories (U.S. & Canada), International Code Council, and many building authorities throughout the world. DuctSox® Corporation is a subsidiary of Rite-Hite Holding Corporation, Milwaukee, WI. read more