Product Type Direct-Fired Portable Oil Kerosene Torpedo Heaters Portability Wheeled Mounted Heating Capacity Output 140 000 BtuH Heating Area 3 500 sq ft Tank Capacity 10 gal Hours on One Filling 9 hr Ignition Type Continuous Spark Ignition Power Source Electric On/Off Switch Included Yes Fuel Gauge Included Yes Power Failure Indicator Included Yes Digital Temperature Readout Included Yes LED Diagnostics Included Yes Built-In Air Pressure Gauge Included Yes