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904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 30" Duct Opening (front blades parallel to shortest dimension)
14 GA 304 SS Construction
055 T6 extruded aluminum construction * Fits all Shoemaker commercial products * Controls airflow evenly * Screwdriver operated * Available in even sizes * Mill finish Options * Clips for easy installation * Soft White
parallel to longest dimension
Heavy Duty ConstructionMRI CompatibleInsect Screen
Pressure Relief Horizontal Air Up 3520-16X20 Smoke-Fire Damper 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
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