The Hydron Module Commercial Series WS/WD heat pumps generate heated or chilled water to use in different heating and cooling applications, including radiant in-floor heating. Compared to other water-to-water heat pumps, these models weigh less and are more efficient. A factory-installed desuperheater for hot water assist is an option. These heat pumps are used to supply hot or cold water for heating and cooling in apartment complexes, residential developments, office buildings, schools, and more.