Pressure Relief Vertical Mount 3510-18X20 past 12 months Louvers designed with rolled rib

Louvers designed with rolled rib for maximum strength and rigidity

Options * 2800 Series - Dynamic Fire Damper * Sleeve variations * 304 stainless steel construction * Fractional and odd sizes available h3

½ × ½ × ½ Aluminum lattice

* 2650 - Round spring actuated (6) damper for vertical or horizontal mount

Maximum single section size 24"x24"

Pressure Relief Vertical Mount 3510-18X20 past 12 months 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