Spiral Pipe Diffuser with Transition Box SD52-16X10G Step Down Ceiling Diffuser Extruded aluminum fixed bar blades

Extruded aluminum fixed bar blades at 45°

165° replaceable fusible link

Stamped steel face with roll formed frame

904 - Double Deflection Adjustable Aluminum Blade Grille For a 30" x 16" Duct Opening (front blades parallel to shortest dimension)

904 - Double Deflection Adjustable Aluminum Blade Grille For a 24" x 4" Duct Opening  (front blades parallel to shortest dimension)

Spiral Pipe Diffuser with Transition Box SD52-16X10G Step Down Ceiling Diffuser Extruded aluminum fixed bar bladesSD52 Transition Box Spiral Pipe Grille (Single Deflection) Standard Features Single deflection transition box mount spiral pipe grille Blades are parallel to the shortest dimension Allows for 2 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 width of