Pressure Relief Horizontal Air Up 3520-24X20 Smoke-Fire Damper Allows for 4-way airflow adjustment

Allows for 4-way airflow adjustment

* UL and California State Fire Marshall approved * 4-1/4" standard frame style * Maximum dimension 60w

inner dimension and outside dimension available * Available in continuous lengths with butt joints * Tamper proof screws * Standard Color

with 75% free area Options 14 GA 304 SS Construction 12 GA (

945 Series Engineering/Performance Data

Pressure Relief Horizontal Air Up 3520-24X20 Smoke-Fire Damper Allows for 4-way airflow adjustmenth3. 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