20' Backdraft Damper / Wall Shutter, 20-1/2' x 20-1/2' Opening Required


High Velocity Single- and Double-Panel Exhaust Shutters Exhaust only Mount: vertical Max. velocity: 3000 FPM 1-1/2' flangeDesigned to prevent air backflow in high-velocity applications when the fan is off. Mill-finish extruded aluminum frame and louvers with stainless steel tie rods and fasteners provide strength, durability, and long-lasting corrosion resistance. Prepunched mounting holes; installation hardware not included.
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  • Item Backdraft Damper / Wall Shutter
  • Fits Fan Dia. 20'
  • Shutter Overall Size 23' x 23'
  • Shutter Construction Material Extruded Aluminum Frame and Stainless Steel Tie Rods
  • Shutter Opening Required 20-1/2' x 20-1/2'
  • Shutter Free Area 2.281 sq. ft.
  • Shutter Mounting Position Vertical
  • Shutter Mounting Location Wall
  • Shutter Item Backdraft Damper / Wall Shutter
  • Frame Depth 3'
  • Open Depth 6-1/4'
  • Flange Width 1-1/2'
  • Mounting Hole Size Prepunched
  • Max. Velocity 3000 FPM
  • Blade Material Mill Finish Extruded Aluminum
  • For Use With Vertical Mounted Exhaust Fans
  • Number of Panels 1

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