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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13
Non-standard size collar (available in 6" through 20")
951 Series Engineering/Performance Data
Standard Features * Airflow can be adjusted to 1
Front blades are parallel to the shortest dimension
3/16” holes on 1/4” staggered centers Extruded aluminum frame with signature line marks Perforated material 58% free area Countersunk mounting holes for flush appearance with color matching Phillips posi- drive screws Rust resistant pre-coat with durable powder finish Soft White
Pressure Relief Vertical Mount 3510-8X8 past 12 months Non-standard size collar (available inh3. 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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