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Ships within 48 hours · Estimated delivery Nov 10 - Nov 15
Spiral pipe diameter must be 4” larger than the width of the grille
425 Series Engineering/Performance Data
SUBMITTAL 700MA Series Submittal
Steel multi-shutter damper
with 53% free area
Pressure Relief Horizontal Air Up 3520-14X20 T-Bar Spiral pipe diameter must beh3. 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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