Centrifugal Upblast Roof Exhaust Fan Application Industrial and Commercial Buildings Schools Drive Type Direct Drive For Air Type Clean Air Base Diameter Not Applicable Base Width 19 in Base Length 19 in Base Shape Square Maximum Static Pressure 1/2 in wc Exhaust Airflow @ 0.000 in SP 480 cfm Nameplate Voltage 115V AC Phase 1 Motor Horsepower 1/20 hp Assembly Assembled Number of Speeds 3 Housing Material Aluminum Wheel Material Aluminum High-Efficiency Motor No