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951 Series Engineering/Performance Data
Non-standard size collar (available in 6" through 20")
904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 18" Duct Opening (front blades parallel to shortest dimension)
950 Series Engineering/Performance Data
Standard Features * Extruded aluminum (
Pressure Relief Vertical Mount 3510-8X8 past 12 months 951 Series Engineering/Performance Datah3. 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
