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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16
Product sizes available to fit spiral pipe diameters 8” – 48
Countersunk mounting holes for flush appearance with color matching Phillips posi- drive screws
1 1/2 hour fire resistance rating
Standard Features * Gang-operated opposed blade radial volume control damper for use with RD Series Round Diffusers * Available in 2" increments from 6"-24"
For damper free area chart A click here * 2563 - Out-of-Airstream fire door
Parallel Volume Damper Low Leak 3000PLL-30X20 Residential Registers & Grilles Product sizes available to fith3. 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
