Atmosphere Backdraft Dampers feature a lightweight aluminum blade, which is spring loaded for positive closure. Prevents air from reverse flowing through the exhaust fan when it is powered off and helps keep cold air out!
• Built for heavy duty installations
• Spring loaded for positive closure
• Requires minimal pressure to operate
• Perimeter gasket ensures the best seal
• Available in FIVE convenient sizes from 4″ to 12″
Use as another line of defense against odor control — will NOT allow contaminated air to escape from the area unfiltered.