A heat energy reclaim system and method for providing output power from input latent heat energy of a hot source fluid and including means for capturing the latent heat energy from the hot source fluid, that includes an input distribution pipe network for distributing the hot source fluid along a plurality of paths with reduced flow and flow rate, and a respective external heat motor operatively connected to each reduced flow path to provide a portion of the output power. Each motor has shaped piston heads to improve heat transfer between the internal gas and the cylinder walls exposed to the hot source fluid and a cold source fluid, respectively, as well as small internal gas conduits also exposed to the hot source fluid, and other characteristics; therefore increasing the motor and system efficiency.