Hydron Module HP high-temperature water-to-water heat pumps provide high water temperatures that are among the industry’s top hot water assist options. These systems can be used to supply 100% of the hot water needs for a home or building, or they can be used for radiant heating, pool heating, or snowmelt. These systems are at home in new construction or an existing home with a small footprint and ability to connect to the same geothermal loop as another system.