Pressure-independent automatic balancing dampers (ABD) are designed to maintain constant airflow volume in HVAC applications. The damper blade is calibrated to automatically adjust to changing pressures reducing the amount of energy required to ventilate a space while improving the indoor air quality. Watch how a Greenheck ABD automatically adjusts to changing system pressure and maintains a constant CFM. https://www.greenheck.com/products/air-control/dampers/automatic-balancing-dampers

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