A large hotel also used as a school-hotel. GM designed the air conditioning systems, the heating of the pools, and the dehumidification systems for them. A large 4-pipe distribution system is used, integrating a series of energy recovery systems, between all heat and cold sources. Installation of 4-pipe multifunction chillers using water from the Douro River as an auxiliary heat source. Energy recovery between domestic hot water heat pumps for chilled water circuits and also in the opposite direction. Installation of a large thermal solar panels field and a special car to avoid any mechanical equipment visible from outside the building. Gross construction area of 17500 m².