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UL 521 Listed
Basis of Design
Multifamily Ready
Fast Lead Times

UL Rated, Fire, Smoke, and Ceiling Radiation Dampers /Fire Dampers /Dynamic 3 Hr Rated /Curtain (ID 247)

FD4D-3B

3 Hour - Dynamic Rated - Fire Damper

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Common Applications

  • Wood Truss Assemblies
  • Multifamily
  • Light Commercial

Resources

Product Sheets

  • PDF FD4D-3B Product Sheet

Installation Instructions

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Accessories

  • PDF FD Operation and Maintenance

Overview

The FD4D-3B fire damper employs curtain style blades for point-of-origin control of fire in static and dynamic HVAC systems. The FD4D-3B 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: 165oF (75oC)
Minimum Size: 6" x 4" (152 x 102)
Maximum Size: 36" x 33" (914 x 838)
Multiple Section: 108" x 21" (2743 x 533)                          
Stainless Steel: Single Section: 36" x 21" (914 x 533)

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