Performance Level

Performance levels for a new building are characterised by

  • an “Energy” level based on the BEPOS rating indicator,
  • a “Carbon” level based on:

    • Eges: indicator of greenhouse gas emissions throughout the building’s life cycle
    • EgesPCE: indicator of greenhouse gases produced via the construction process and equipment used.

Four energy performance levels have been defined for positive energy buildings, along with two environmental performance levels regarding greenhouse gas emissions.


  • The calculation method for these indicators is outlined in the “Evaluation Method” section of the website.
  • The “Energy – Carbon” for New Buildings – Evaluation Method for Energy and Environmental Performance of New Buildings reference framework also outlines the calculation method for additional indicators of an informative nature, regarding:

    • use of renewable energies,
    • summer comfort levels,
    • environmental impact not linked to greenhouse gas emissions.

Energy Performance Levels

The evaluation of a building’s energy performance is carried out via comparison with a maximum energy assessment level: the BEPOSmax rating.

BEPOS Rating ≤ BEPOSmax Rating

There are four possible performance levels for positive energy buildings.

The “Energy 1”, “Energy 2” and “Energy 3” levels show progress in the improvement of the building’s energy efficiency and use of renewable heat and electricity:

  • The first two levels, “Energy 1” & “Energy 2” indicate an improvement on the requirements of existing energy efficiency standards (RT2012). Their implementation should lead to improved building performances via cost-effective measures, either through energy efficiency measures or the use of renewable energy (particularly heat energy) to meet the building’s needs.
  • The “Energy 3” level represents an additional effort compared to the previous two levels. Achieving this level requires greater endeavour in terms of the energy efficiency of the building and its systems, as well as significant use of renewable energy sources, whether for electricity or renewable energy.
  • Finally, the “Energy 4” level refers to a building with a flat or negative level of overall energy use, which contributes to the production of renewable energy for the local area.

Energy Performance Levels

Performance Levels for Greenhouse Gas Emissions

The evaluation of the building’s performance in terms of greenhouse gas emissions is achieved via a comparison with the maximum level of GHG emissions over the building’s life cycle (Egesmax) and the level of GHG emissions caused by products and equipment used in the construction process (Egesmax,PCE).

Eges ≤ Egesmax & EgesPCE ≤ Egesmax,PCE

A building’s performance in terms of greenhouse gas emissions may be attributed one of two levels:

  • level “Carbon 1” is available to all types of construction and energy carriers, as well as operations having been subject to multiple constraints (construction on a seismic area, soil type, etc.) ; its aim is to include all operators in the construction sector in the process of evaluating and reducing a building’s carbon/energy impact throughout the entirety of its life cycle;
  • level “Carbon 2” aims to highlight the achievements of the most high-performance building operations; it entails greater efforts in terms of reducing the carbon footprint of the materials and equipment used, as well as the building’s energy consumption.

Performance Levels for Greenhouse Gas Emissions