Aluminum Airfoil Blade Grille - Horizontal Fixed Blade 907-14X12 Accessories round collar only) * 830

round collar only) * 830 OR - factory installed opposed radial damper (sizes 6"-14") * 830 FR - U

855 Series Engineering/Performance Data

RD Series Submittal

904 - Double Deflection Adjustable Aluminum Blade Grille For a 14" x 12" Duct Opening (front blades parallel to shortest dimension)

Standard Features * Gang-operated opposed blade radial volume control damper for use with RD Series Round Diffusers * Available in 2" increments from 6"-24"

Aluminum Airfoil Blade Grille - Horizontal Fixed Blade 907-14X12 Accessories round collar only) * 830Standard Features Surface mount fixed blade grille with airfoil blades at 0 Blades are parallel to the longest dimension Blades spaced at 2 3" Extruded aluminum surface mount frame with signature line marks Countersunk mounting holes with color matching Phillips Pozidriv screws Rust resistant pre coat with durable powder finish Soft White Options Recessed screwdriver operated Opposed Blade Damper 2" ADC compliant round collar with bead for ease of