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Designed for large volume air delivery
904 - Double Deflection Adjustable Aluminum Blade Grille For a 20" x 10" Duct Opening (front blades parallel to shortest dimension)
Note: Listed Size Is Nominal Duct Opening / Nominal Filter Size
Louvers designed with rolled rib for maximum strength and rigidity
Double deflection radius mount spiral pipe grille with adjustable blades
Spiral Pipe Diffuser with Transition Box SD34-24X8G T-Bar Designed for large volume airSD34 Transition Box Spiral Pipe Grille (DOUBle Deflection) Standard Features Double deflection transition box mount spiral pipe grille Blades are parallel to the shortest dimension Allows for 4 way airflow adjustment Nylon bushings on adj. blades prevent metal on metal rattle Curved saddle with gasket provides airtight fit to spiral pipe Product sizes available to fit spiral pipe diameters 8 48." Spiral pipe diameter must be 4 larger than Height of
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