The ES-30 backdraft damper series are vertically mounted backdraft dampers designed to allow horizontal airflow up and prevent reverse airflow down. Model ES-30 has no flange, model ES-31 has a flange on the discharge side, and model ES-32 has a flange on the intake side. All dampers in this series open by air pressure differential and close by gravity. This series includes adjustable counterbalance weights to assist opening.
Pressure: Up to 6 in. wg, dependent on damper width
Velocity: Up to 2000 fpm
Extruded Aluminum Frame
Damper Selection Guide
Which damper best fits the application? Greenheck’s damper interactive selection guide removes the guesswork. Find blade type, velocity, pressure, AMCA listings, submittals, drawings and more, all in one easy-to-use format.