Fantech RSK4 4-Inch Duct Backdraft Damper

Backdraft dampers (also called gravity dampers) allow airflow in one direction and prevent reverse airflow for use in exhaust or intake HVAC systems. This Fantech RSK4 4-Inch Duct Backdraft Damper for circular ducts is manufactured from galvanized sheet metal. Every Fantech Backdraft Damper is built with performance in mind. Available In Single Or Multi-Packs The Fantech RSK4 4-Inch Duct Backdraft Damper is available in the following quantities: Single RSK 4 Backdraft Damper 30 Pack Carton Key Features Positioning options: The damper can be mounted vertically. Damper blades formed from aluminum H14: Twenty percent stronger than 1100 series aluminum. 24 GA, G90 galvanized steel casing: Galvanized steel is coated with a thin layer of zinc. The zinc coating protects the steel beneath it from rust. Spring Loaded Blades: Its two blades are spring-loaded. Central Rod: Features a 3/32" diameter brass central rod. Summary This Fantech 4-Inch Damper allows airflow in one direction and prevent reverse airflow. Built with performance in mind, Fantech RSK4 is manufactured from galvanized sheet metal.