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904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 16" duct Opening (front blades parallel to shortest dimension)
Standard Features * 2501 -Square or rectangular for vertical mount only
Tool Operated Opposed Blade Damper
Standard Features * Fixed airfoil blades parallel to 1st dimension given *
Pressure Relief HD 3530-24X24 Commercial 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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