Parallel Volume Damper Low Leak 3000PLL-30X20 Residential Registers & Grilles Options * MAR - Mounting

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

Fan shaped 1/2" spaced louvers

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

1 1/2 hour fire resistance rating

Product sizes available to fit spiral pipe diameter 8” – 48

Parallel Volume Damper Low Leak 3000PLL-30X20 Residential Registers & Grilles Options * MAR - Mountingh3. 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