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904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 14" Duct Opening (front blades parallel to shortest dimension)
Available in 6”–12” collar sizes
Countersunk mounting holes for flush appearance with color matching Phillips posi- drive screws
Holds up to a 4" filter (not included) with filter retention tabs (FG4)
165° standard * All sizes utilize one main curtain stay * Galvanized finish h3
Parallel Blade Volume Damper 3000P-34X10 Commercial 904 - Double Deflection Adjustableh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
