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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
Available 4" thru 40" round
Countersunk mounting holes with color matching Philips posi-drive screws
Square to round 2" collar with roll formed retention bead - available in square sizes only
Standard Features * Lightweight Aluminum vent louver * This is a larger version of the 4901 series * Flush face * Spring clip mounting * Able to withstand wet and corrosive environments * Easily installed using only a high grade silicon caulk * Satin Anodized finish Options * IS - Insect screen * Standard Color or Designer Color Finish available on this product
Pressure Relief HD 3530-14X18 Smoke-Fire Damper Available 4" thru 40" roundh3. 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
US$ 12.98
US$ 30.99
US$ 26.98
