Pressure Relief Horizontal Air Up 3520-8X12 T-Bar Ceramic fiber blade insulation with

Ceramic fiber blade insulation with fiberglass cover*

Countersunk mounting holes for flush appearance

1 1/2 hour fire resistance rating

Extruded aluminum frame with signature line marks

Submittals and Performance Data

Pressure Relief Horizontal Air Up 3520-8X12 T-Bar Ceramic fiber blade insulation withh3. 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