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Ships within 48 hours · Estimated delivery Oct 15 - Oct 20
3/4" round collar
Delivers supply air in a 360° air pattern
57% free area * 1307: 13/16" lattice opening
All steel parts with galvanized finish or zinc coating
1600 Series Submittal
Pressure Relief HD 3530-14X20 Specialty Products 3/4" round collarh3. 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
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