Since 1992, Duct Design has been successfully designing, manufacturing and installing superior HVAC and Duct systems. DDC sup ... plies an array of services for: • High Rise Condominiums • Government, Commercial and Industrial Institutions • Schools • Hospitals Throughout the years, our company has grown from a small organization to a team of 90+ experienced employees. We pride ourselves on providing quality workmanship and developing long-lasting-business relationships with each of our clients. Furthermore, we remain a family owned and operated business. One of our goals is to bring extensive expertise to the HVAC industry and we extend our efforts to create a well suited atmosphere for employees. We provide a work place with flexibility, reliability, integrity, and growth. read more