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Backdraft dampers (also called gravity dampers) are used in exhaust and intake HVAC systems to allow airflow in one direction while preventing reverse flow. This Fantech RSK10 10-Inch Duct Backdraft Damper for circular ducts is manufactured from galvanized sheet metal. Every Fantech Backdraft Damper is built with performance in mind. Learn More About The Fantech RSK10 Several key features separate…