Energy performance

Using mainly solar and geothermal energy, Green Office® Bordeaux will produce more energy than it will consume over one year of operation. Special materials and cutting-edge installations will guarantee maximum occupant comfort. 

Geothermal system

Green Office® Bordeaux will take advantage of the Aquitaine region’s significant potential geothermal resources. The Garonne River’s alluvial deposits are around 10 to 30 metres deep. They will provide a temperature of approximately 17°C to produce the energy required for the air conditioning system.
This solution involves using a heat pump to extract groundwater from a borehole to remove the heat and cool air. The water is then returned to the aquifer via a separate borehole.

Groundwater. Crédits : AS-Achitecture-Studio

Production of domestic hot water

Domestic hot water will be produced by rooftop solar thermal panels and a gas back-up system.


Photovoltaic panels

Around 1,000 m² of monocrystalline photovoltaic panels will be installed flat on the roof. An additional 300 m² of panels will be mounted as blinds on the south-eastern façade. The photovoltaic panels will produce some 312,000 kWh per year. 


Using solar energy will enable us to offset our building’s energy consumption over a year. Credits : AS-Achitecture.Studio

Going further than 2012 thermal regulations

Green Office® Bordeaux has set itself the ambitious target of achieving primary energy less than the threshold set by the 2012 thermal regulations.


Energy Performance Contract (EPC)

Under this contract, the building operator undertakes to guarantee the tenant’s energy consumption levels in accordance with predefined conditions of use and occupancy.
An energy management system provides an accurate analysis of the building’s energy consumption in order to control consumption in real time, 24/7.

Software package to assist with EPC management 

The SI@GO software application analyses the building’s energy production and consumption in real time in terms of energy use and location.

SI@GO performs three main tasks:

  • records the building’s energy data every 15 minutes, 
  • presents the data clearly and understandably to all stakeholders,
  • produces a monthly report, which is used in meetings to track whether commitments are being met under the EPC.