Within the world of air-conditioning, the variable refrigerant flow systems (VRF) are the most versatile in terms of installation possibilities and technological innovation. Thanks to the DC Inverter technology, which varies the frequency of the compressor motor and fan motor of the outdoor unit depending on the total required load, and thanks to electronic expansion valves (both in the outdoor and the indoor units), which regulate the flow of refrigerant depending on the load required for each area, higher levels of efficiency and superior energy savings are achieved. The installation distances available are among the longest in the market, reaching up to 200 meters of equivalent length between the outdoor unit and the farthest indoor unit.