Which type of damper is generally recommended for lower airflow velocity situations?

The curtain damper is specifically designed to operate effectively in applications with lower airflow velocity. Its design usually incorporates a series of flexible blades or curtains that can move with the air pressure and flow, allowing for control of airflow without causing significant turbulence or resistance, which is ideal in situations where the airflow is not strong.

In contrast, the other types of dampers suit different conditions. The single blade damper is often used in high-velocity applications where quick adjustments to airflow are necessary. The multi-blade damper provides more precise control over airflow and pressure but is also designed with higher airflow velocities in mind. Pressure relief dampers are typically utilized to prevent excessive pressure buildup within duct systems, primarily in high-pressure scenarios, rather than in lower airflow situations.

Thus, the curtain damper's ability to handle lower velocities without introducing excessive airflow disruptions makes it the recommended choice for these conditions.