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