In-line Duct Fan Heater Airflow @ 0.000 in SP 210 cfm Duct Diameter 8 in Heating Capacity 2457 BtuH 4915 BtuH Motor Output Power 720 W 1 440 W Motor IP Rating None Nameplate Voltage 120V AC Overall Height 10 3/8 in Overall Length 10.5 in Application General Purpose High-Efficiency Motor No Speed Controllable No Housing Material Galvanized Steel Motor Speed 1 400 RPM Airflow @ Static Pressure 120 cfm @ 0.100 in SP 60 cfm @ 0.125 in SP Control Voltage 120 V Current 12.0/6.0 A