The document discusses NIBE air/water heat pumps. It describes that air/water heat pumps capture heat from outside air using a vapor compression cycle similar to a refrigerator. This captured heat is used for heating and hot water. The document specifically discusses the NIBE F2026 and F2300 monobloc heat pumps and provides details on their specifications and performance. It also outlines different system configuration options that can be used with the heat pumps, including controllers and indoor modules.