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Modern step-down design with 4-way air diffusion
904 - Double Deflection Adjustable Aluminum Blade Grille For a 40" x 18" Duct Opening (front blades parallel to shortest dimension)
Nylon bushings on adjustable blades prevent metal on metal rattle
Designed for ceiling or sidewall applications
Standard Features * 2633 - Square or rectangular out-of-airstream fire damper for vertical mount only
2" Round 3 Hour Vertical Fire Door 2565-24 Accessories Modern step-down design with 4-wayh3. Standard Features * 2561 Square or rectangular fire door for vertical mount only. Maximum dimension 48w, 49h. For damper free area chart A click here * 2563 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 48w, 41h. For damper free area chart B click here * 2565 Round fire door for vertical mount only. Available 4" thru 40" round. * UL and California State Fire Marshall approved * 2" thinline frame *
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