4" 3 Hour Vertical Mount Fire Door 2661-14X14 Residential Registers & Grilles 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 6" Duct Opening   (front blades parallel to shortest dimension)

PERFORMANCE DATA 600TFG Series Engineering/Performance Data

Extended sleeve (2751)

14" and 16" Options * Field installable Bowtie Damper (BD) * HL OR - factory installed opposed radial damper (sizes 6"-14") * HL FR - U

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4" 3 Hour Vertical Mount Fire Door 2661-14X14 Residential Registers & Grilles 904 - Double Deflection Adjustableh3. 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"