Pay in 4 interest-free payments of $33.63 Learn more
Ships within 48 hours · Estimated delivery Sep 28 - Oct 3
3-hour fire resistance rating
Heavy Duty ConstructionMRI CompatibleInsect Screen
Designer Colors
Fractional Sizes
Pressure Relief Horizontal Air Up 3520-16X18 Step Down Ceiling Diffuser 3-hour fire resistance ratingh3. Standard Features * 3510 Vertical mount * 3520 Horizontal mount air up * 3530 Horizontal mount air down * Designed to open with negative or positive pressures for intake or exhaust air * Felt edge blades to hold noise to a minimum * Aluminum construction * Blade to blade linkage * 1 4" pivot pins in nylon busings * Maximum size 24 x 24 * Mill finish h3. Options * Sleeve variations * Mounting flange * Adjustable counter balance to adjust various
US$ 27.62
US$ 22.99
US$ 14.99
US$ 12.99
US$ 20.99
US$ 24.99
