Fireless steam locomotives, also known in Germany as steam accumulator locomotives, were preferred for industrial railroads where steam with which to fill the locomotive occurs practically as a byproduct. The energy supply for this kind of locomotive consists of a quantity of water heated beyond the boiling point of 100° Centigrade or 212° Fahrenheit. On the Henschel 0-8-0 locomotives the water capacity was 20 cubic meters or 5,283 gallons and the steam pressure was 20 Bar or 290 pounds per square inch. These units were affordable, used very little fuel and other supplies, and were very robust in daily switching work. For these reasons this type of motive power is still being used successfully in places such as the Mannheim power plant.