Model FD4D-3A

3 Hour - Dynamic Rated - Fire Damper
Curtain Style Blade

The FD4D-3A fire damper employs curtain style blades for point-of-origin control of fire in static and dynamic HVAC systems. The FD4D-3A is qualified to 4,000 ft/min (20.3 m/s) and 4 in.wg. (1.0 kPa) and may be installed in vertical walls or partitions with fire resistance ratings up to 2 hours.

Standard Construction

Frame: 22 ga. (0.85) galvanized steel.
Blades: 24 ga. (0.7) galvanized steel - curtain.
Fire Closure Device: Fusible link.
Fire Closure Temperature: 165^oF (75^oC)
Minimum Size: 6" x 6" (152 x 152)
Maximum Size: 36" x 36" (914 x 914)
Multiple Section: 108" x 24" (2743 x 810)
Stainless Steel: Single Section: 36" x 24" (914 x 610)

Ratings

UL 555 Fire Resistance Rating: 3 hour (vertical)
UL HNLJ.V-5: Ventilation Duct Assemblies

UL 555 Listing: R14981
CSFM Listing: 3225-1404:101
New York City MEA Listing: 295-98-E
Meets NFPA Standards: 90A, 92A, 92B and 101
Meets Building Code Standards: IBC, NBC, NFPA, SBC and UBC