They're mounted from the HVAC ductwork and they are activated to close every time they feeling smoke. Smoke dampers are often product of aluminum and also have a motorized actuator that closes the damper. Balancing dampers are employed through HVAC procedure commissioning to regulate airflow across various duct branches. Unlike https://aircontroldampersforhotcl23455.izrablog.com/37149990/an-unbiased-view-of-air-control-dampers-for-hot-climates