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You can buy factory price air vent damper from a great list of reliable China air vent damper manufacturers, suppliers, traders or plants verified by a third-party inspector. Total 97 air vent damper factories & companies found with 291 products.Problems with the dampers – sometimes the dampers of the motorized damper component can become stuck, prohibiting the damper from opening and closing as needed. A technician will know how to get into your supply ductwork to determine and repair the problematic damper.