Portable Gas Torpedo Heater Fuel Type Propane Heating Capacity Output 125 000 BtuH Heating Area 3 100 sq ft Minimum Cylinder Size 20 lb Ignition Type Continuous Spark Ignition Power Source Electric Thermostat Included No 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 No Flame-Out Sensor Included No LED Diagnostics Included No