FSDR25C 1-1/2 hr Round Corridor Damper

The FSDR25C is a round tunnel corridor fire/smoke damper with UL555 Classification as a 1 ½ hour rated fire damper and a Leakage Class I UL555S Smoke Damper.  

It features:

• 1-1/2 hour rating.
• EFL or PFL heat-actuated devices that permit closed closure through the actuator and are automatic remote resettable after test, smoke detection, or power failure conditions.
• Galvanized steel construction.