EXHAUST FAN WITH DRIVE PACKAGE, ASSEMBLED UNASSEMBLED, BLADE DIAMETER 36 IN, BLADE MATERIAL ALUMINUM, DRIVE TYPE BELT DRIVE, EXHAUST AIRFLOW @ 0.000 IN SP 19,922 CFM, FOR CUT-OUT HEIGHT 38 1/2 IN, FOR CUT-OUT WIDTH 38 1/2 IN, FRAME FINISH ZINC PLATED, FRAME MATERIAL STEEL, GUARD TYPE NONE, INCLUDES DRIVE PACKAGE, INCLUDES DEHUMIDISTAT NO, MAXIMUM AIRFLOW 19,922 CFM, MAXIMUM NOISE LEVEL 31 SONES