Aluminum Airfoil Blade Double Deflection Diffuser 904-24X4 Damper:Opposed Damper 14" and 16" Options *

14" and 16" Options * Field installable Bowtie Damper (BD) * HL OR - factory installed opposed radial damper (sizes 6"-14") * HL FR - U

Spiral pipe diameter must be 4” larger than the width of the grille

904 - Double Deflection Adjustable Aluminum Blade Grille For a 38" x 18" Duct Opening (front blades parallel to shortest dimension)

Hand operated level for easy filter access and cleaning

904 Series Performance Data

Aluminum Airfoil Blade Double Deflection Diffuser 904-24X4 Damper:Opposed Damper 14" and 16" Options *904 Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening (front blades parallel to shortest dimension) Standard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to shortest dimension, back blades parallel to longest dimension Extruded aluminum surface mount frame with signature line marks Provides 4 way air flow on one plane Nylon bushings on adj. blades prevent metal on