They are really set up from the HVAC ductwork and are induced to shut when they perception smoke. Smoke dampers are frequently product of aluminum and have a motorized actuator that closes the damper. Balancing dampers are utilised all through HVAC procedure commissioning to control airflow across various duct branches. https://elliottlbwma.idblogz.com/37131758/how-air-control-dampers-for-engine-sheds-can-save-you-time-stress-and-money