Pressure Relief Vertical Mount 3510-24X18 T-Bar 904 - Double Deflection Adjustable

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 14" Duct Opening(front blades parallel to shortest dimension)

Full-length screwdriver operated Scoop Extractor

855 Series Submittal

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

Adjustable curved blade diffuser

Pressure Relief Vertical Mount 3510-24X18 T-Bar 904 - Double Deflection Adjustableh3. 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