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Face set in an outer T-Bar filter grille frame
To adjust diffuser
Options * MAR - Mounting Angle Ring (sold in pairs - 2 needed
Nylon bushings on adjustable blades to prevent metal on metal rattle
904 - Double Deflection Adjustable Aluminum Blade Grille For a 48" x 8" Duct Opening (front blades parallel to shortest dimension)
Pressure Relief Horizontal Air Up 3520-24X16 T-Bar Face set in an outerh3. 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
