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904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 20" Duct Opening (front blades parallel to shortest dimension)
3-way register with stiffened 1/2" fan shaped louvers for silent operation
1/2" spacing dual angular louvers for strength and maximum free area
Performance Data With Multi-Shutter Damper
4 1/4" Horizontal/Vertical Mount Fire Damper 2602-48X10 Commercial 904 - Double Deflection Adjustableh3. Standard Features * 2601 Square or rectangular for vertical mount only. Maximum dimension 60x60 single, 120x120 multiple. * 2602 Square or rectangular spring actuated (6) for horizontal or vertical mount. Maximum dimension 60x60. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion tested galvanized
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