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Narrow ceiling grid dimples for 9/16" T-Rails
For damper free area chart A click here * 2563 - Out-of-Airstream fire door
904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 24" Duct Opening (front blades parallel to shortest dimension)
Ceramic fiber blade installation with fiberglass cover*
BD - field installable Bowtie Damper (available on even sizes 6"-14")
Parallel Blade Volume Damper 3000P-70X18 T-Bar Narrow ceiling grid dimples forh3. 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
