Feasibility study, cost estimation, tender design and detailed design for summer/winter air-conditioning systems, sanitary installations for a multi-storey building used for offices, meeting rooms and cafeteria. Office air conditioning by radiant ceilings with modules designed for air intake and extraction. Meeting room air conditioning by radiant ceilings with modules and primary air inlet and outlet diffusers. Meeting room air conditioning by radiant ceilings with modules and primary air inlet and outlet diffusers. Cafeteria/atrium air conditioning by water fan coils and primary air inlet and outlet diffusers. DHW production by 300 l producer with integrated air-cooled heat pump. The hot/cold vector fluid generated by the use of 2 ground water condensed heat pumps with a cooling capacity of 99.0 kW each. Primary vector fluid ground water taken from an intake well inside the property. Restitution of ground water by trench drain. The air changes and the relative humidity control are guaranteed by means of a ventilation block installed in the covering, developed for the filtration of the outside air. Heat recovery by exchange between the outside air and extracted ambient air, cooling coil, heating and humidification battery.