What is the correct use of double acting barometric dampers?

Double acting barometric dampers are specifically designed to control airflow in both directions. They accomplish this by allowing air to flow freely in and out of a system, maintaining a balanced airflow that is crucial for optimizing HVAC performance. These dampers automatically adjust based on the pressure difference created by either incoming or outgoing air, opening or closing as necessary to maintain the desired airflow balance.

This functionality is critical in various applications, such as when dealing with systems that experience changes in pressure due to different operational states or environmental conditions. Proper operation of double acting dampers ensures that there is no excessive air loss and that systems remain adaptable to varying conditions while enhancing overall efficiency.

While regulating pressure and minimizing spillage are important aspects of HVAC system design, they are not the primary purpose of double acting dampers. Similarly, the intention of these dampers is not to stop all motion; rather, they are meant to facilitate controlled airflow, highlighting their role in dynamic air management rather than total obstruction.