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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
Standard Features * For large volume air delivery * For evaporative coolers or central blower systems * Adjustable directional dampers with shut-off * Countersunk mounting holes for flush appearance with color matching Phillips posi-drive screws * Soft White
Standard Features * 1" rim size (2" larger than nominal duct size) * 14 gauge steel * 1305: 1/2" lattice opening
904 - Double Deflection Adjustable Aluminum Blade Grille For a 34" x 18" Duct Opening (front blades parallel to shortest dimension)
Tamper-proof Screws
1x2 T-Bar (10" x 22" duct)
Pressure Relief Vertical Mount 3510-12X24 Smoke-Fire Damper Standard Features * For largeh3. 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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