SPRSUN heat pump water heaters come in a variety of configurations, including external heat mixers, underground or source water heating systems, EVI cold climate heat pumps, water park heat pumps, and so on. This elevated hot water hydronic heating are intended for use in residential, commercial, or industrial water heating applications. Heat pump water heaters’ maximum outlet water temp may reach 60°C. SPRSUN heating system water heaters have heating capacities ranging from 7.6KW to 100KW. A ground source heat pump works similarly to an external heat system in that it involves high coolant to absorb and transmit heat between interior and outside. Heat pumps, as opposed to air-to-water systems, transmit energy via underground pipes in the earth.