In France, with the rise in hydrocarbon prices and the tightening of regulations in favour of decarbonisation, the use of geothermal facilities to heat and cool buildings is becoming increasingly common. Where groundwater resources permit, groundwater-based technology is adopted. This involves creating a geothermal heat exchanger to extract the water and then return it to its original environment. This is the solution chosen by Icade Promotion, in addition to connection to the urban heating network, for heating and cooling the Origine property complex, a mixed-use development (offices, housing, shops) with 66,500 m2 of floor area.

Artelia carried out exploration drilling to identify the most interesting aquifer to be used, then carried out hydraulic and thermal modelling to check the feasibility of the project at the required flow rate (60 to 80 m3/h). Our teams then implemented a solution based on two pumping boreholes and two reinjection boreholes, designing and drawing up the facility’s specifications, and supervising the work right through to handover. This facility contributes to the high-level labels and certifications obtained by this building (HQE Excellent, BREEAM Outstanding, E+C- level E3C2, BBCA Excellence, BEPOS Effinergie Excellent, WELL Gold, LEED Gold, R2S 3*, WiredScore Platinum, Ready to Osmoz, BiodiverCity).