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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15
3% maximum leakage with a pressure differential 3" W
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening (front blades parallel to shortest dimension)
Blades parallel to shortest dimension
Available 4" thru 40" round
Blade lock to secure blades once the product is activated
3 Hour Out Of Air Fire Door Grille 2663-20X10 T-Bar 3% maximum leakage with ah3. Standard Features * 2661 Square or rectangular fire door for vertical mount only. Maximum dimension 60x60. For damper free area chart A click here * 2663 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 60w x 52h. For damper free area chart B click here * 2665 Round fire door for vertical mount only. Available 4" thru 52" round. * 3 hour rated * UL and California State Fire Marshall approved * 4 1 4"
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