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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16
Standard Features * 2661 - Square or rectangular fire door for vertical mount only
Standard Features * For evaporative cooling or high velocity exhaust applications with divided 2-way multi-louver and combination shut-off * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White
Front blades are parallel to the shortest dimension
available with one
Pressure Relief Horizontal Air Up 3520-12X24 Accessories Standard Features * 2661 -h3. 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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