FSD37SS 1-1/2 hr V-Groove Blade Combination Fire/Smoke Damper
The FSD36SS Combination Fire/Smoke Damper is both UL555 and UL555S Classified. It is rated as a 1 1/2 hour fire damper and a Leakage Class I Smoke Damper. It features:
- Triple vee grove blades.
- Rated to 2,000 fpm and 4"w.g.
- UL approval for dual directional airflow.
- Failsafe design, which enables the damper to automatically assume the desired position when fire or smoke (if smoke detector is present) interrupts operational power.
- Controlled closure in not less than 3 seconds and no more than 15 seconds to prevent HVAC and duct damage.
- Automatic remote reset after test, smoke detection or power failure conditions.
- Stainless steel construction
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