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1600 Series Submittal
57% free area * 1307: 13/16" lattice opening
Front blades are parallel to the shortest dimension
All steel parts with galvanized finish or zinc coating
Pressure Relief HD 3530-14X20 Specialty Products 1600 Series Submittalh3. Standard Features * 3510 Vertical mount * 3520 Horizontal mount air up * 3530 Horizontal mount air down * Designed to open with negative or positive pressures for intake or exhaust air * Felt edge blades to hold noise to a minimum * Aluminum construction * Blade to blade linkage * 1 4" pivot pins in nylon busings * Maximum size 24 x 24 * Mill finish h3. Options * Sleeve variations * Mounting flange * Adjustable counter balance to adjust various
