Hydronic heating systems are gaining in popularity because they provide a high level of comfort. Because of their comfortable average temperature and the fact that there is little stratification, people are typically comfortable at air temperatures several degrees cooler than otherwise. This offers many advantages and a great potential for energy savings. Hydronic Heating Systems use water (or water-based solutions) to move thermal energy from where it is produced to where it is needed. The water within the system is neither the source of the heat nor its destination - only its transportation system. Thermal energy is absorbed by the water at a heat source, conveyed by the water through the distribution piping, and finally released into a heated space by a heat emitter.