1-1/2 Hour - Static Fire Damper
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.
Installation Instructions
Frame: 22 ga. (0.85) galvanized steel.
Blades: 24 ga. (0.7) galvanized steel - curtain.
Fire Closure Device: Fusible link.
Fire Closure Temperature: 165oF (75oC)
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)
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