Pressure Relief Horizontal Air Up 3520-20X16 Commercial Rust-resistant pre-coat with durable powder

Rust-resistant pre-coat with durable powder finish

Standard Features * Lightweight Aluminum vent louver * Able to withstand wet and corrosive environments * Spring clip mounting * 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

Dampers above 80 square inches free area will be provided with blade insulation

and 2x4 panels * Soft White

Stamped steel face with roll formed frame

Pressure Relief Horizontal Air Up 3520-20X16 Commercial Rust-resistant pre-coat with durable powderh3. 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