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Ships within 48 hours · Estimated delivery Aug 23 - Aug 28
Ceiling opening must be 4” larger in length and width than the nominal duct size
Performance Data
Steel riveted and metal formed assembly
Square or rectangular for vertical mount only
4-way reversible door on square sizes
Pressure Relief HD 3530-16X16 Smoke-Fire Damper Ceiling opening must be 4”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
