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The FANTECH RSK8 backdraft damper is designed for circular ducts and manufactured from galvanized sheet metal. It prevents air from blowing back into the space when the fan is off. The damper features two spring-loaded blades and is built with performance in mind. It can be mounted vertically.
This 8-inch circular backdraft damper is made from galvanized steel with aluminum damper blades and spring-loaded for a positive closure.
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