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Double deflection transition box mount spiral pipe grille
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 14" Duct Opening (front blades parallel to shortest dimension)
Nylon bushings for easy adjustment and quiet setting of blades running parallel to shortest dimension
CB30 - three way
T-Bar Modular Core Diffuser with Round Collar 18-20
Pressure Relief HD 3530-14X18 Smoke-Fire Damper Double deflection transition box mounth3. 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
