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904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 6" Duct Opening (front blades parallel to shortest dimension)
Blade lock to secure blades once the product is activated
Opposed Blade Damper
FGAD Series Submittal
2" ADC compliant round collar with bead for ease of installation (square sizes only)
3 Hour Out Of Air Fire Door Grille 2663-20X16 Step Down Ceiling Diffuser 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"
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