BLOWER, WHEEL TYPE FORWARD-CURVED, INCLUDES DRIVE PACKAGE YES, ASSEMBLY UNASSEMBLED, WHEEL DIAMETER 11 1/2 IN, AIRFLOW @ 0.125 IN SP 2,515 CFM, AIRFLOW @ 0.250 IN SP 2,400 CFM, AIRFLOW @ 0.375 IN SP 2,260 CFM, AIRFLOW @ 0.500 IN SP 2,080 CFM, AIRFLOW @ 0.750 IN SP 850 CFM, MAXIMUM STATIC PRESSURE 3/4 IN WC, MAXIMUM INLET AIR TEMPERATURE 140 DEGREES F, SHAFT DIAMETER 3/4 IN, BEARING TYPE BALL, SOUND LEVEL 14.1 SONES @ 0.250 IN SP AND 5 FT, 14.7 SO