Indoor air quality, whole house fans, exhaust and ventilation fans

One Way Air Flow Valve 7" Duct-Case of 5 SKU: Tti-CDB7 The Cape Backdraft Damper is the ultimate one way air flow valve, designed to overcome the inefficiencies and limitations of traditional gravity or butterfly dampers. The Cape Backdraft Damper consists of a specially formulated fabric sleeve attached to an outer metal sleeve. The fabric sleeve will allow air to pass through in the desired direction of flow with miniscule reduction in airflow. The Cape Backdraft Damper works well or better than other dampers at stopping undesired airflow. It is far superior in that it allows unrestricted airflow in the desired direction without reducing system efficiency. The Cape Backdraft Damper is silent, produces no metal clanging sounds and can be installed in horizontal or vertical ductwork. Free UPS ground shipping! (excludes Alaska and Hawaii-call for quote) Download PDF Brochure Price:  $70.00 case Quantity