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Avenger – detached house in Creuse, France

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This detached house represents the designer’s ambition to make this type of housing accessible to all and thus drastically reduce pollution related to buildings. The house is 100% autonomous thanks to its field of 96 m² bifacial photovoltaic panels (sized for two buildings) and its battery park. Production of photovoltaic panels = 19.2 kW peak battery storage capacity 15 kW. Here are the peculiarities of this house:

  • Certified passive premium by the PassivHaus Institute: no heating or cooling system (thanks to the design of the envelope and the orientation of the building in order to make the most of the solar contributions)
  • Exceptional living comfort (no cold areas, optimal air quality, etc.): 100% autonomous in electricity (fields of photovoltaic panels bi-facial and park batteries); 100% autonomous in drinking water (rainwater drilling or recovery, filter body purification system and UV bactericide)

Approach of sustainability:

Pollution related to the building activity sector accounts for 25% of total CO2 emissions in France. Alarmed by this observation, the design team, aimed at designing a house that have no impact on the environment, from their realization to their use. In order to take up this major challenge, the prototype presented here has been developed to consume very few resources and use only renewable energies, while favouring materials with low environmental impact.


Architectural description:

Architecturally inspired Alsatian, the house Avenidor is built of cellular concrete (masonry material the least impacting ecologically and offering the best performance) and is insulated with polystyrene (recycled) extruded under raft and expanded in elevation. This house of 252m ², has 3 levels:

  • A basement in heated envelope;
  • Ground floor (living room and open kitchen, WC)
  • First floor (3 bedroom and 3 bathroom)

Through its aesthetics, Avenidor demonstrates that a high-performance building can have a traditional architecture. In addition to benefit from a perfect insulation (R of 10 on average overall envelope) the building is oriented in order to make the most of the bioclimatic contribution (maximum opening to the south and very little to the north).



  • Primary energy need: 30,00 kWhpe/m2.year
  • Primary energy need for standard building: 50,00 kWhpe/m2.year
  • Final Energy: 31,00 kWhfe/m2.year


  • Envelope U-Value: 0,10 W.m-2.K-1
  • Building Compactness Coefficient: 0,60
  • Indicator: n50 (I4) m3/H.m2 n50 (Vol/H) Q4
  • Air Tightness Value: 0,18
  • Users\' control system opinion: Extremely easy to use. Perfect.
  • Real final energy consumption: 31 kWhfe/m2.year 


  • Heating system: heat pump
  • Hot water system: heat pump
  • Cooling system: no cooling system
  • Ventilation system: double flow heat exchanger
  • Renewable systems: solar photovoltaic

The site is supplied with electricity by 96m² of photovoltaic panels bifacial (20% additional production) connected to an automated battery park. The bifacial panels are placed on a white slab and along a pond to enjoy a phenomenon of reverberation and harvest more. The system generates electricity for 2 buildings (19.2 kW peak and 15kW storage). Treatment and purification system for drilling water by filter body and UV bactericide. Microstation purification, operating without electricity, for the total treatment of grey and black water.


Renewable energy production: 100,00 %

Solutions enhancing nature free gains: Heat exchangers for heat recovery on gray water. VMC double flow with 90% exchanger efficiency



GHG in use: 0,45 KgCO2/m2/year

Methodology used: GES calculation tool developed by Ecobatiment

GHG before use: 1,00 KgCO2 /m2

Building lifetime: 100,00 year(s)

GHG Cradle to Grave: 297,00 KgCO2 /m2

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