Portable Gas Torpedo Heater, Fuel Type Natural Gas, Heating Capacity Output 150,000 BtuH, Heating Area 3,500 sq ft, Ignition Type Interrupted Spark, Ignition Power Source Electric, Thermostat Included Unit-Mounted, Overall Height 16 1/8 in, Overall Width 11 13/16 in, Overall Depth 25 9/16 in, Automatic Safety Shut-Off Included Yes, Built-In Air Pressure Gauge Included Yes, Digital Temperature Readout Included Yes, Flame-Out Sensor Included No, LED Diagnostics Included No