Parallel Blade Volume Damper 3000P-54X42 Commercial Airfoil blades individually adjustable on

Airfoil blades individually adjustable on 3/4" centers

904 - Double Deflection Adjustable Aluminum Blade Grille For a 40" x 18" Duct Opening (front blades parallel to shortest dimension)

Available 4" thru 40" round

Driftwood Tan

Standard Features * 4000 - door core grille with single frame * 4100 - door core grille with additional loose frame *

Parallel Blade Volume Damper 3000P-54X42 Commercial Airfoil blades individually adjustable onh3. 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