Automatic dampers utilize fluid dynamics, not electrical controls, to maintain precise airflow volumes in a duct system. This is how the self-regulation works: The technician begins by setting the desired airflow rate in CFM (cubic feet per minute) using the adjustable set-point on the damper. The stationary stator blade then applies calibrated tension on the moving damper blade to hold the airflow steady at the set target. As conditions fluctuate, the pressure differential across the damper blade provides the lift force needed to automatically adjust the blade’s position. This “pressure independence” keeps the airflow volume constant despite changes in static pressure or air velocity in the duct. By leveraging the physics of fluid dynamics, the damper automatically modulates in response to system conditions to maintain the desired airflow. This approach delivers accurate and consistent air balancing without relying on complex electronic controls.