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Thermal regulation

What is RT 2012?

The RT 2012 is a thermal regulations that apply in France to the building permit some commercial buildings (1) on 28 October 2011 and of all residential buildings from the 1st January 2013.

Discussed in the Environment Grenelle, it sets for new buildings a maximum threshold of primary energy consumption ("Cepmax") of 50kWh / m2 / year on average.

This requirement includes five energy uses: heating, cooling, domestic hot water, lighting and auxiliary. It is fixed in absolute terms and not relative value but varies depending on the building type, altitude and climate zone (France is divided into different climatic zones).

The Cepmax (in kWh / m2 / year) is adjusted according to the geographical location (2) This threshold of 50 kWh / m2 / year equivalent to label "Low Consumption Building" (BBC) being divided by three and the average requirement of the previous regulation, RT 2005.

The other major innovation of the RT 2012 is on intrinsic quality of the building, regardless of the energy systems used: the frame components (heating, cooling and artificial lighting) must have limited energy accumulated need.

RT 2012 also provides
  • for the maintenance of maximum indoor temperature in buildings during periods of high summer heat;
  • the use of renewable energy in house, treatment of thermal bridges and air tightness or a minimum area of windows.
Ultimately, the RT 2012 should help save 150 billion kilowatt hours (kWh) and avoid the emission of 13 and 35 million tonnes of CO2 over the period 2013-2020 (3).

(1) Box of building permits concerned
(2) Thermal Regulation 2012: the project was completed, "Environment News, July 6, 2010
(3) "Decree No. 2010-1269 of 26 October 2010 on the thermal characteristics and energy performance of buildings" Legifrance

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