Pressure Relief Vertical Mount 3510-16X12 Step Down Ceiling Diffuser Standard Features * Airflow can

Standard Features * Airflow can be adjusted to 1

904 - Double Deflection Adjustable Aluminum Blade Grille for a 48" x 18" Duct Opening (front blades parallel to shortest dimension)

14" and 16" * Perforated face with concealed hinges * 2x2 galvaneal steel panel with seismic support hangers * Soft White Options * Field installable Bowtie Damper (BD) (sizes 6-14") * 780 OR - factory installed opposed radial damper (sizes 6"-14") * 780 FR - U

Standard Features * Modular core ceiling diffuser * Modular core has galvaneal steel blades in

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Pressure Relief Vertical Mount 3510-16X12 Step Down Ceiling Diffuser Standard Features * Airflow canh3. 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