Pressure Relief Horizontal Air Up 3520-12X20 T-Bar Ceiling opening must be 4”

Ceiling opening must be 4” larger in length and width than the nominal duct size

Louvers designed with rolled rib for maximum strength and rigidity

Standard Features * Double deflection aluminum wall or ceiling register * Heavy gauge aluminum frame * Individually adjustable extruded aluminum airfoil blades * Allows for spot or normal air diffusion * Hidden mounting mechanism * White Options: * Standard Color or Designer Color Finish available on this product

Fits 1x1 ceiling grids (collar size 6"-10")

Maximum single section size 24"x24"

Pressure Relief Horizontal Air Up 3520-12X20 T-Bar 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