In-Line Duct Fan For Fan Type Dryer Booster Airflow @ 0.000 in SP 153 cfm Duct Diameter 4 in Motor Output Power 84 W Motor IP Rating IP44 Nameplate Voltage 115V AC Phase 1 Number of Speeds 1 Overall Height 7 3/4 in Overall Width 7 3/4 in Application Dryer High-Efficiency Motor No Housing Material Galvanized Steel Motor Speed 2 880 RPM Includes Attached Pressure Switch Mounting Bracket Maximum Inlet Air Temperature 140 Degrees F Speed Controllable Yes