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HVL Series Engineering/Performance Data
Spiral pipe diameter must be 4” larger than the width of the grille
Back blades are parallel to the longest dimension
SD34 - Transition Box Spiral Pipe Grille (DOUBle Deflection)
Architectural Lattice Grilles 1303-38x14 Step Down Ceiling Diffuser HVL Series Engineering/Performance DataStandard Features 1 rim size (2 larger than nominal duct size order size) 14 gauge steel construction Countersunk mounting holes for a flush appearance 11 32 Wide x 1 27 32 High slots. 5 32 crossbars, with 75% free area Options 14 GA 304 SS Construction Fractional Sizes Tamper proof Screws *Pricing is based on standard 14 GA steel construction. Please contact us for a quote on options. tony@registers direct. com
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