Good practice

French design agency showcases its low-energy office

French design agency showcases its low-energy office
© a2I, image #92162013, source:
Office and administration
High cost
Resource savings: Energy:
Annual energy production of 11 600 kWh provided by 82 m2 of photovoltaic panels
Premises and operation areas:
Office building
Size of company:
Small (less than 50)
Advancement in applying resource efficiency measures:
One off investment:

Green architecture, by design 

  • Air heat pump produces 2.2 times more energy than it consumes
  • 82 m2 of photovoltaic panels produce 11 600 kWh per year

Fluid’ Concept, a design agency specialising in the construction and renovation of buildings with very low-energy consumption, decided in 2008 to build a new head office in Neufchâteau, France. They saw it as an opportunity to showcase the company’s design strengths and improve its 'green' image.

With large bay windows, the design follows the principle of bioclimatic architecture to maximise natural light and 'solar gain'. The building is timber-framed and the walls contain 21 cm of fiberglass wool plus 10 cm of wood wool insulation. Very low-consumption lighting using LEDs has been implemented throughout the building. Heating is provided by an air-to-water heat pump and ventilation is provided by a dual-flow controlled mechanical ventilation (sometimes called VMC) system with an extractor for sanitary facilities.

Key benefits

The air heat pump produces 2.2 times more energy than it consumes, keeping energy consumption for heating as low as 13 kWh/m2. In addition, 82 m2 of photovoltaic panels are installed on the roof, which produce 11 600 kWh per year.  This energy production represents around half of all consumed electricity on the property and the excess is then sold back to EDF, the French power company.

Thanks to all these measures, Fluid' Concept is a truly low-energy office with conventional primary consumption of some 61.1 kWh/m2 of 'gross floor area' or GFA per year.


"Given our activity, it was imperative to design and build a new building that was particularly energy efficient. This project has enabled us to apply the know-how we offer to our customers to ourselves. To do this, we have used the full range of methods and tools currently available: bioclimatic architecture, choice of natural materials, the most innovative technologies and equipment. This project has stimulated us and all the staff are very happy to work in a functional and harmonious environment". - Gilles Henry, manager of the Fuid' Concept design office


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