Centrifugal Upblast Roof Exhaust Fan, Application Industrial and Commercial Buildings, Restaurants, Schools, Drive Type Belt Drive, Wheel Diameter 14 3/4 in, Base Diameter Not Applicable, Base Length 26 in, Base Width 26 in, Base Shape Square, Maximum Static Pressure 1 3/4 in wc, Maximum Airflow 3,124 cfm, Minimum Airflow 2,001 cfm, Maximum Motor Horsepower 1 hp, Minimum Motor Horsepower 1/4 hp, Maximum Motor Speed 1,725 RPM, Minimum Motor Speed 1,105 RPM, Assembly Unassembled