SKU HR6N37_3
These 4 in. backdraft dampers are designed for versatile ventilation control. They are constructed from galvanized steel with a powder coat finish, while the flap leaves are made from aluminum to resist corrosion and maintain smooth operation. When installing, push the damper into the ventilation pipe as far as it will go, and orient the spring so it sits horizontally with the flap in its intended horizontal position to allow optimal opening and closing. The design works with the TD lip to regulate airflow and helps prevent air from re circulating when the fans are not running, which can improve overall duct performance. They suit a range of residential, commercial, and industrial applications, including air conditioning units, exhaust fans, range hoods, and heating ducts, and can be used in various duct layouts. Each package includes two dampers and they can be inserted into both flexible and non flexible ducts. Plastic ducts are not compatible due to size differences, so verify duct type before selecting these dampers to ensure proper fit and performance. All dimensions are measured by hand with a typical tolerance of about one to three millimeters in production and may vary slightly. This type of damper offers a straightforward solution for controlling backdrafts without needing additional hardware. The drive for easy installation means teams can implement these dampers with minimal disassembly, providing steady airflow control across fluctuating loads.
