The directions adopted at the ground tables of the Grenelle Environment Forum, in Autumn 2007, initiated the ecological mutation of France. The whole of this work on energy policies resulted into the vote of the laws Grenelle I and II. These two acts use as a basis for the application of the guidance given to France for energy, such as principles of the Thermal Regulations of 2012 (2012 TR).
The 2012 TR succeed to the previous Thermal Regulations of 2005 (2005 TR). They are necessary regulations from the 1st January 2013 for every individual projects of new-build. The aim is to carry on the action initiated by the certification “Lower Energy Building”. The setting of the 2012 TR will lead to a great improvement of the energy efficiency of buildings. This enhancement translates into a better bioclimatic design and the spread of the most efficient techniques in the building field.
A strong commitment of the Grenelle Environment Forum
In accordance with the 4th article of the Grenelle I Act, the 2012 TR aims to limit the primary energy consumption of new-build to a maximum of 50 kWh (per m² per year), on average, while sparking off :
• A technological and industrial significant evolution for every field of building and equipments
• A high level of energy quality of building
• A technical and economical balance between the energies used for heating and production of domestic hot water
It sets three requirements in terms of results :
The energy efficiency of the building
The demanded level of minimal energy efficiency of the building is defined by the “bioclimatic needs of the building” coefficient. This requirement orders at the same time a restriction of energy needs for the elements linked to the building design (heating, cooling, lighting). In this way, an enhancement of energy systems is requested.
The energy consumption of the building
The requirements of primary energy maximal conventional consumption is represented by the “primary energy consumption” coefficient, focusing on the consumption of heating, cooling, lighting, domestic hot water production, and supplementaries (pumps, fans).
This level of demand requires, besides the improvement of the building, represented by the “bioclimatic needs of the building” coefficient, the resort to reliable energy equipments with high-efficiency.
Summer comfort in buildings without air conditionning
Following the 2005 TR, the 2012 TR sets the categories of buildings in which a proper level of comfort is maintainable without resorting to an active system of cooling.
2005 TR – 2012 TR : What modifications ?
The 2012 TR is three times more demanding than the previous TR. 6 noteworthy changes must be taken into account :
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