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904 - Double Deflection Adjustable Aluminum Blade Grille for a 16" x 8" Duct Opening (front blades parallel to shortest dimension)
Non-standard size collar (available in 6" through 20")
Lever operated multi-shutter damper
with 75% free area Options 14 GA 304 SS Construction 12 GA (
2" Round Horizontal/Vertical Mount Fire Damper 2550-16 Specialty Products 904 - Double Deflection AdjustableStandard Features Spring actuated curtain type fire damper with 2 1 4" round connection for horizontal or vertical mount 2" thin line roll formed out of airstream frame Designed for use in walls, floors and partitions with fire resistance ratings of 2 hours or less (for ceiling application, see 2700 series) UL listed and tested in accordance with UL Standard 555 1 1 2 hour fire resistance rating Building materials rated 2 hours or less CSFM California
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