Thermal Expansion furnace which operates on BuildCraft energy. It has one input (blue) and one output (orange). Maximum power is 3 MJ/t. Total energy storage is 9600 MJ (6 coal) which is enough to smelt a stack (64) of items. One benefit of the Powered Furnace is that it will automatically output whatever is in the output spot. It does not need a Wooden Pipe and Engine to do so.