Product Type Direct-Fired Portable Oil Kerosene Torpedo Heaters Portability Wheeled Mounted Heating Capacity Output 650 000 BtuH Heating Area 13 500 sq ft Tank Capacity 50 gal Hours on One Filling 10 hr Ignition Type Interrupted 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