The evaluation method defines the calculation methods for indicators relating to a building’s energy consumption and environmental performance, notably including greenhouse gas emissions.
The economic impact of the technical choices made by property developers in order to attain various performance levels for Positive Energy & Low Carbon buildings is assessed via an economic evaluation.
Scope of application
Evaluation method – areas of application
- for construction operations involving new buildings, whose usage is described in article R.111-20-6 of the French Construction and Habitation Code
from the time the building receives final approval.
- The method may be applied during other phases of the construction project, but an updated calculation will need to be made once the building is given final approval in order to refresh the provisional results.
Area of evaluation
The evaluation method allows users to calculate the energy and environmental performance indicators for a given construction operation under the responsibility of a single property developer.
The area of evaluation is the area indicated in the construction permit.
Takes into account all sources of energy consumed by the building when in use;
The regulatory calculation method Th-BCE 2012, defined in a ministerial decree issued on 20 July 2011, should be taken into account
The method is defined in the “Energy/Carbon – Evaluation Method for Energy and Environmental Performance and New Buildings” reference framework.
- The environmental impact of equipment and devices linked to specific forms of consumption (electrical-domestic appliances, office equipment, etc.) are not accounted for in this evaluation method, aside from the impact of their electricity consumption (initially calculated according to the method used to determine internal input for the Th-BCE method).
Reference Period for Environmental Calculations
In order to carry out an analysis of the building’s life cycle, it is necessary to determine the period after which the building will be demolished. As a rule, this period is considered to be 50 years for all buildings.
The evaluation method distinguishes between three types of data:
- specific data,
- standardised generic data
- conventional data
Conventional entry values pertaining to climate data and the occupation and use of buildings are taken from the Th-BCE regulatory evaluation method.
- for more information: RT Bâtiment website
- Specific data
- Generic default Data
- Conventional Data
- All this data is freely available via the INIES database
- For more information, consult the “Carbon Energy – Evaluation Method for Energy and Environmental Performance and New Buildings” reference framework.
Calculation of Energy and Environmental Performance
Approach used to establish environmental performance levels
The calculation method uses two approaches for the calculation of environmental performances:
- a simplified approach, making it easier to assess the building’s environmental impact
- Detailed calculation for all work items
Energy calculations and calculation engine
Calculations of building energy performances are carried out using a calculation engine provided by the ministry responsible for construction, supplementing the current engine used for regulatory calculations.
The calculation engine provided only allows for the calculation of an energy performance level, with an annual calculation for:
- calculation of energy consumption by non-regulated equipment or devices,
- the self-consumption calculation.