AQC Industries has revolutionized air-duct systems for use indoors, outdoors and underground in commercial, industrial and re ... sidential applications. The BlueDuct, Q Duct and PalDuct Preinsulated Duct Systems are advanced alternatives to fiberglass and sheet metal ductwork with many benefits, including energy and labor savings. AQC engineers, technicians and representatives work closely with customers to provide consistent high-quality products, CAD services and contractor training. AQC’s products are offered through knowledgeable distributors and representatives throughout North America. read more