Product Type Direct-Fired Portable Oil Kerosene Torpedo Heaters Portability Wheeled Mounted Heating Capacity Output 600 000 BtuH Heating Area 13 500 sq ft Tank Capacity 35.6 gal Hours on One Filling 8.3 hr Ignition Type Direct Spark Ignition Power Source Electric On/Off Switch Included Yes Fuel Gauge Included Yes Power Failure Indicator Included Yes Digital Temperature Readout Included No LED Diagnostics Included Yes Built-In Air Pressure Gauge Included No