Multiblade Static Fire Dampers
The FD-MB Series of static fire dampers is available in 1-1/2 & 3 hour ratings and carry listings with UL, ULC & California State Fire Marshal. The FD-MB Series of multibladed dampers are available in standard 3V blades as well as Airfoil shaped blades for superior pressure drop performance, and are acceptable for use in 'Fans Off' systems
  • Available with a full range of factory sleeves and duct transitions
  • Available with either 3V style blades (FD-MB-3V) or Airfoil Blade designs (FD-MB-AF).
  • True Round Model Available (FD-RD)
  • Front access and “out of wall” grille mount versions available (FD-OW)

Submittal - Triple-V Multiblade Static Fire Damper - 1-1/2 or 3 Hour - FD-MB-3V
Submittal - Airfoil Multiblade Static Fire Damper - 1-1/2 or 3 Hour - FD-MB-AF
Submittal - True Round Fire Damper - 1-1/2 Hour - FD-RD


Submittal - Framed Retaining Angles for UL Fire Damper Installations - FRA
Submittal - Microswitch for Multiblade Dampers - M/S

Installation Manuals

Installation Instructions - Fire Dampers - FD
Installation Instructions - Out of Wall / Partition for Fire Dampers and Combination Fire Smoke Dampers
Installation Instructions for Series FD-RD and FDD-RD
Installation Supplement - Installation in Concrete Floor with Steel Deck


Performance Data - Engineering performance data for Fire Dampers
Size Chart for Fire Damper Type B and Type C curtain fire dampers

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