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Adjustable aluminum airfoil blades oriented for 1 or 2 way airflow pattern
Double deflection surface mount grille with adjustable airfoil blades
916 Series Engineering/Performance Data
904 - Double Deflection Adjustable Aluminum Blade Grille For a 42" x 18" Duct Opening (front blades parallel to shortest dimension)
Maximum dimension 48w
4" Horizontal/Vertical Mount Fire Damper 2634-36X6 Accessories Adjustable aluminum airfoil blades orientedh3. Standard Features * 2633 Square or rectangular out of airstream fire damper for vertical mount only. * 2634 Square or rectangular Spring actuated (6) out of airstream fire damper for horizontal or vertical mount. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Maximum dimension 60w, 52h * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion
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