Model FD4-B

1-1/2 Hour - Static Fire Damper
Curtain Style Blade

The FD4-B fire damper employs curtain style blades for point-of-origin control of fire in static HVAC systems. The FD4-B may be installed in vertical walls or partitions, or horizontally in floors or assemblies 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: Vertical Mount: 4" x 2" (102 x 51)
                           Horizontal Mount: 6" x 4" (152 x 102)
Maximum Size: Single Section: Vertical: 48" x 44" (1219 x 1117)
                           Horizontal: 40" x 36" (1016 x 914)
                           Multiple Section: Vertical: 120" x 76" (3048 x 1930) or
                                                                     80" x 116" (2032 x 2946)
                                                       Horizontal: 80" x 76" (2032 x 1930)
Stainless Steel: Single Section: 40" x 36" (1016 x 914)
                            Multiple Section: Vertical: 80" x 36" (2032 x 914) or
                                                                     40" x 76" (1016 x 1930) or
                                                                     108" x 22" (2743 x 559)                                                     
                                                        Horizontal: 80" x 36" (2032 x 914) or
                                                                          40" x 76" (1016 x 1930) 

Ratings

UL 555 Fire Resistance Rating: 1-1/2 hour (vertical and horizontal)
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