High BTU per hour heater without the exhaust fumes or moisture associated with gas heat. Useful for comfort heating and process heating applications up to 180° F. Can be operated unattended without risk fire or need for refueling. Fan-only operation for air recirculation, fume exhaust, or fresh air supply. Dual thermostat operation. 120 volt control supply. 120 volt control transformer with pilot light. Over temperature limit protects unit from low air flow conditions. Powder coated corrosion resistant 20 gauge steel housing. 10" pneumatic wheels and 4" locking caster. Inlet and outlet flexible duct accessories available for ducting up to 165'. Adjustable damper accessory allows outlet temperature to be controlled.