Aluminum Airfoil Blade Double Deflection Diffuser 904-30X14 past 12 months All steel parts with galvanized

All steel parts with galvanized finish or zinc coating

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

3 cone steel diffuser with hinged core for easy duct access

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

Aluminum Airfoil Blade Double Deflection Diffuser 904-30X14 past 12 months All steel parts with galvanized904 Double Deflection Adjustable Aluminum Blade Grille For a 30" x 14" 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