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945 Series Engineering/Performance Data
904 - Double Deflection Adjustable Aluminum Blade Grille For a 38" x 18" Duct Opening (front blades parallel to shortest dimension)
Square to round 2" collar with roll formed retention bead - available in square sizes only
Holds up to a 1" filter (not included) with filter retention tabs (FG1)
Pressure Relief Vertical Mount 3510-16X16 Specialty Products 945 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
