Radon Fan For Fan Type Centrifugal Inline Airflow @ 0.000 in SP 166 cfm Duct Diameter 4 1/2 in Motor Output Power 58 W Motor IP Rating IP44 Nameplate Voltage 120V AC Phase 1 Number of Speeds 1 Overall Diameter 10 in Overall Height 9 1/4 in Overall Width 10 in Application Radon High-Efficiency Motor No Housing Material Plastic Motor Speed 2 533 RPM Maximum Inlet Air Temperature 140 Degrees F Speed Control Included No