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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23
To adjust diffuser
PERFORMANCE DATA
Options Recessed screwdriver operated Opposed Blade Damper
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 20" Duct Opening (front blades parallel to shortest dimension)
Concealed mounting holes with mounting screws
4" 3 Hour Vertical Mount Fire Door 2665-8 past 12 months To adjust diffuserh3. 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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