In a curtain damper Type C installation, where are the blades and frame positioned?

In a Type C curtain damper installation, the blades and frame are positioned out of the airstream. This design allows for effective airflow management without creating excessive resistance or turbulence within the duct system. By placing the damper out of the direct flow of air, it helps maintain energy efficiency and reduces noise that can result from air forcing its way around obstacles.

This positioning is particularly important in systems where minimizing pressure drop and ensuring smooth airflow is critical. When dampers are located out of the airstream, they can also be adjusted without interrupting the flow of air, making them versatile for controlling ventilation rates and air distribution as needed.