Pressure Relief Horizontal Air Up 3520-24X12 Residential Registers & Grilles inner dimension and outer dimension

inner dimension and outer dimension sizes available * Tamper proof screws * Standard Color

1/2" spacing dual angular louvers for strength and maximum free area

TS Series Engineering/Performance Data

CB30 - three way

Standard Features * Fixed bar blades parallel to 1st dimension given *

Pressure Relief Horizontal Air Up 3520-24X12 Residential Registers & Grilles inner dimension and outer dimensionh3. 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