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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
Available in even sizes 6" to 20" and 24"
Standard Features * Heavy guage cold roll steel (same as 350 series) * Ideal for return air in the toe space areas between kitchen cabinets
450 Series Submittal
Minimum size is 4"x4"
Pressure Relief Horizontal Air Up 3520-20X14 Commercial Available in even sizes 6"h3. 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
