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Divided 2-way multi-louver and combination shut-off
CSFM California State Fire Marshal listed
* UL and California State Fire Marshall approved * 4-1/4" standard frame style * Maximum dimension 60w
Opposed Blade Damper standard on 4" widths
Adjustable curved blade diffuser
Pressure Relief Vertical Mount 3510-24X18 T-Bar Divided 2-way multi-louver and combinationh3. 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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