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OFSD-311

Model OFSD-311 is an out-of-wall combination fire smoke damper with airfoil blades. It is approved for use in walls, partitions, and floors with fire-resistance ratings less than three hours. This damper allows for easy access through the grille to the damper, closure device, and actuator.

  • Pressure: Up to 8 in. wg
  • Velocity: Up to 4000 fpm
  • Temperature: Up to 350掳F

Certifications:

AMCA Air Performance

California State Fire Marshal (Listing # 3225-0981:0103 and 3230-0981:0104)

UL 555 and UL 555S (Listing #R13317)

Purchase Options:
Codes:

International Building Code (IBC)

National Fire Protection Association (NFPA 80, 90A, 92, 101, and 105)