Aluminum Airfoil Blade Double Deflection Diffuser 904-30X12 Residential Registers & Grilles 425 Series Engineering/Performance Data

425 Series Engineering/Performance Data

contour molded fiberglass back with a foil barrier backing

listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square collar Additional Drawings * 825 MA

3/4" round collar

Product sizes available to fit spiral pipe diameter 8” – 48

Aluminum Airfoil Blade Double Deflection Diffuser 904-30X12 Residential Registers & Grilles 425 Series Engineering/Performance Data904 Double Deflection Adjustable Aluminum Blade Grille For a 30" x 12" 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