Combination Fire and Smoke Damper FSD35 - Class III V-Groove Blade

The FSD35 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 III Smoke damper. It features:

• Triple vee groove 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.
• The EFL or PFL heat-actuated release devices permit controlled closure through the actuator and are automatically remote resettable after test, smoke detection, or power failure conditions.
• Galvanized steel construction