Dampers are used in ducts to adjust the airflow and direction. It prevents air from automatically flowing backwards or adjusts the airflow in order to maintain the temperature and moisture in each room. Dampers can be controlled manually or automatically. It is made from special thick galvanized steel. Customers can custom order them as required. The design and manufacturing processes are completed by machines controlled by computers for the highest precision. All processes adhere to SMACNA and ASHRAE standards.