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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19
7/8” Wide x 7/8” High square holes
Margin edges are 7/8" projection for baseboard installation
Type 316 stainless steel
back blades parallel to the shortest dimension Extruded aluminum surface mount frame with signature line marks Provides 4-way air flow on one plane Nylon bushings on adj
Opposed Blade Damper standard on 4" widths
Pressure Relief HD 3530-18X18 past 12 months 7/8” Wide x 7/8” Highh3. 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
