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Dynamic 1.5 Hour Rated Round Fire Damper, 14 In. Diameter

The Greenheck Model DFDR is a round fire damper for use in walls, floors, and partitions with fire-resistance ratings less than three hours. Dynamic-rated-fire dampers are in HVAC systems that remain operational in the event of a fire. Dampers are provided with 13.625" sleeve and two retainer plates.
Availability:  4 in Troy


Installation, Operation, and Maintenance Manual



UL 555 (Listing # R13317)


International Building Code (IBC)

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

Products specifications
Attribute name Attribute value
Pressure Up to 4 in. wg
Velocity Up to 2000 fpm
Temperature Up to 286°F
Weight 13 lbs