Kerosene space heaters are an ideal solution where electricity is very costly or scarce. These are also viable options that can be used when electricity fails, such as during a winter storm. Kerosene space heaters date back over a century.
In terms of efficiency, a gallon of kerosene is able to generate as much as heat as a wheel barrow full of wood. Kerosene when burnt generates fewer harmful byproducts as compared to wood. Kerosene heaters can operate at an efficiency of 90% to 100%.