These heaters burn kerosene to produce hot air. The heat is forced out by a high power fan in the unit. They need to have a constant source of electricity to run, both to ignite the fuel and to force the air. These heaters do create CO and need to be used with care. Using these in an enclosed area can easily result in death. Do not leave unattended. Should be transported in a pick up truck. Can leak kerosene if not upright.
AKA: Torpedo heaters, Salamander heater, Construction heater