Install heat pumps, which use the physical properties of substances called refrigerants to extract heat from an environment and release it to a warmer environment, counter to spontaneous heat flow. Create the necessary openings and install the indoors and outdoors parts of the heat pump. Connect electricity and any ducts, and configure the heat pump.
DATA SOURCED FROM ESCO (EUROPEAN COMMISSION) & O*NET (U.S. DEPARTMENT OF LABOR)