Parallel Volume Damper Low Leak 3000PLL-54X20 Residential Registers & Grilles One piece curved frame with

One piece curved frame with gasket fits flush to spiral pipe

Standard Features * T-Bar lay-in panel with perforated face * 2x2 galvaneal steel panel with seismic support hangers * Round No Labor Collar attached to panel * Soft White Options * 105 P D - multi-shutter damper with hinged perforated face * 105 P O - opposed blade damper with hinged perforated face * TVB - Thermal Vapor Blanket * Square collar

Note: Sizes are Listed Nominal Duct Opening

Aluminum 3 cone T-Bar diffuser with a fixed face

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 16" Duct Opening (front blades parallel to shortest dimension)

Parallel Volume Damper Low Leak 3000PLL-54X20 Residential Registers & Grilles One piece curved frame withh3. 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