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Ships within 48 hours · Estimated delivery Aug 9 - Aug 14
" Spiral pipe diameter must be 4” larger than width of grille
Accessory to the 90 Series
Heavy gauge cold roll steel
Standard Features Double deflection surface mount grille with adjustable airfoil blades Front blades parallel to longest dimension
Pressure Relief Horizontal Air Up 3520-18X14 Specialty Products " Spiral pipe diameter musth3. 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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