Dynamic (Fans On) Fire dampers are UL555 tested and labeled devices installed in ducts and air transfer openings or air distribution systems, designed to close upon the detection of heat.

FDD-AOW

Curtain Fire Damper - 1-1/2 Hour - Dynamic - Sleeved - Out of Wall

Application

UL classified for installation the grille and damper assembly does not allow for mounting in the plane of the fire barrier with a fire rating of less than 3 hours. This damper may be installed vertically or horizontally in dynamic HVAC systems that continues to run in the event of fire.

Product Information