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104 D FR - U
Standard Features *Surface mount return air grille * 0 fixed blades parallel to longest dimension * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White Options * 937 O - recessed screwdriver operated opposed blade damper * No Labor Collar (square sizes only) * 900 T - T-Bar mount * 905 HD - reinforced construction * 905 IS - insect screen * 1335-1338 Series - stainless steel version * Tamper proof screws
Front blades are parallel to the shortest dimension
904 - Double Deflection Adjustable Aluminum Blade Grille For a 36" x 24" Duct Opening (front blades parallel to shortest dimension)
57% free area * 1307: 13/16" lattice opening
Opposed Blade Volume Damper 3000-0BD-44X30 Specialty Products 104 D FR - Uh3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee 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.
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