Designed with constant force springs in the horizontal configurations to ensure closure under airflow conditions.
Meets all UL and NFPA requirements for Primary Fire Dampers, and carries a UL555 classified fire damper label.
Approved for use where ducts penetrate partitions with fire resistance ratings of two hours or less.
1-1/2 hour rating for use in fire barriers rated two hours or less.
Optional installed duct sleeves available.
|6" x 6"||24" x 24"|