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DDRD Series 

Round Barometric Relief Dampers






Available Sizes: 8”, 10", 12", 14", 16” Diameter

DDRD Series Round Barometric Relief Dampers, Pressure relief damper, barometric damper, hvac, air conditioning supplies, RetroZone

Our most popular relief dampers due to low cost and ease of installation. 

The DDRD Series barometric relief damper comes installed in a round sheet metal enclosure similar to a motorized damper. 

This relief damper features an adjustable, weighted arm used to increase and decrease air flow resistance. A 12" barometric relief will handle up to a 5 ton unit. Our unit features a longer arm than most for better airflow adjustment. 

Extra weights are available. 

Use flexible or rigid duct with starting collars for easy installation.

Application: Residential and light commercial zoning systems 5 ton and under.

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