Parallel Volume Damper Low Leak 3000PLL-30X20 Residential Registers & Grilles For damper free area chart

For damper free area chart A click here * 2563 - Out-of-Airstream fire door

1550 Series Engineering/Performance Data

Designer Color

Options * MAR - Mounting Angle Ring (sold in pairs - 2 needed

Parallel Volume Damper Low Leak 3000PLL-30X20 Residential Registers & Grilles For damper free area charth3. 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