Parallel Volume Damper Low Leak 3000PLL-70X12 Step Down Ceiling Diffuser 850 Series Engineering/Performance Data

850 Series Engineering/Performance Data

2-way reversible door on rectangular sizes

remove the two center cones as a unit and reposition the six screws

904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 14" Duct Opening (front blades parallel to shortest dimension)

Standard Features * Airflow can be adjusted to 1

Parallel Volume Damper Low Leak 3000PLL-70X12 Step Down Ceiling Diffuser 850 Series Engineering/Performance Datah3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control