Dampers
A Damper is a mechanical device installed in air ducts to control, regulate, or stop airflow within a heating, ventilation, and air conditioning (HVAC) system. It acts like a gate inside the duct — which can open, close, or adjust to change the amount of air passing through.
Regulate air distribution across rooms or zones
Shut off airflow to unused areas to save energy
Control air balance in large systems
Manage temperature in different zones (zoned HVAC)

Better air distribution
Improved energy efficiency
Enhanced comfort through zoning
Safety during fire or smoke emergencies
Quieter HVAC operation