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Ships within 48 hours · Estimated delivery Aug 30 - Sep 4
Provides 4-way air flow on one plane
Free area equals more than 75% of nominal size
Minimum size 4"x4"
904 - Double Deflection Adjustable Aluminum Blade Grille For a 40" x 18" Duct Opening (front blades parallel to shortest dimension)
* 2534 - Square or rectangular spring actuated (6) for horizontal or vertical mount
2" 3 Hour Vertical Mount Fire Door 2561-20X16 Accessories Provides 4-way air flow onh3. 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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