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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31
Louvers designed with rolled rib for maximum strength and rigidity
For damper free area chart B click here * 2565 - Round fire door for vertical mount only
with 75% free area Options 14 GA 304 SS Construction 12 GA (
Adjustable aluminum curved blades
Pressure Relief Horizontal Air Up 3520-12X18 Step Down Ceiling Diffuser Louvers designed with rolled ribh3. 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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