Pressure Relief Vertical Mount 3510-22X22 past 12 months Standard Features * Airflow can

Standard Features * Airflow can be adjusted to 1

Zinc plated steel closure spring

1x2 T-Bar (8" x 20" duct)

104 D FR - U

Standard Features * Converts T-bar products to surface mount * Sizes available: 1x2

Pressure Relief Vertical Mount 3510-22X22 past 12 months Standard Features * Airflow canh3. 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