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Dampers above 80 square inches free area will be provided with blade insulation
Standard Features * 2561 - Square or rectangular fire door for vertical mount only
SUBMITTALS CB10 Series Submittal
Standard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to longest dimension
904 - Double Deflection Adjustable Aluminum Blade Grille For a 18" x 4" Duct Opening (front blades parallel to shortest dimension)
Pressure Relief Horizontal Air Up 3520-20X16 Commercial Dampers above 80 square inchesh3. 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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