Pressure Relief Horizontal Air Up 3520-6X6 Specialty Products Available 4" thru 52" round

Available 4" thru 52" round

Available in 4" through 24" round

available 4" through 40" round (2549)

1 for each end)

Single deflection radius mount spiral pipe grille with adjustable blades

Pressure Relief Horizontal Air Up 3520-6X6 Specialty Products Available 4" thru 52" 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