BBC Renovation in connection with the Tertiary Decree

The building sector represents nearly 47% of energy consumption in France and generates 17% of direct greenhouse gas emissions. Faced with this observation, it becomes imperative to rethink the way in which tertiary buildings are managed and renovated. The Tertiary Eco Energy System (DEET), in force since 2019, aims to drastically reduce the energy consumption of tertiary buildings of more than 1,000 m².

At the same time, the BBC Effinergie labels encourage renovations or high energy performance operations but adopt a much broader benchmark which integrates environmental criteria, optimization of the construction phase, optimization of water consumption or waste for example. The DEET approach focuses on energy management during the operating phase. What is new is that the DEET will bring transparency to the market at the end of 2024 with a rating whose impact will certainly come close to the labels highly sought after by asset managers to promote their assets under management, but only on the basis of the criterion energy of surface consumption intensity (in kWh per m2 per year).

Building owners are increasingly moving towards certifications such as the BBC Effinergie label in order to enhance their heritage. Buildings already BBC certified, thanks to their low energy consumption and sustainable design, have a head start in achieving compliance with the requirements of the tertiary decree.

How do these certifications become strategic assets for owners wishing to both enhance their assets and comply with current regulations?

The tertiary decree: objectives for progressive reduction of energy consumption

The tertiary decree or Tertiary Eco Energy Device (DEET) requires owners and occupants of tertiary buildings to reduce their final energy consumption according to the following levels:

40% by 2030,
50% by 2040,
60% by 2050 (compared to baseline consumption).

Two approaches are possible to comply with this regulation:

Reduce energy consumption in relative value: compared to a reference year, with objectives expressed as a percentage reduction.
Achieve energy consumption in absolute values : fixed according to the type of activity, geographic location and intensity of use of buildings.

Succeed in the Tertiary Decree

These regulatory requirements involve a structural transformation of the way buildings are operated and renovated. To achieve these objectives, it is essential to adopt a suitable and efficient energy renovation approach, such as BBC renovation.

BBC Renovation: an asset for compliance with the tertiary decree

The BBC (Low Consumption Building) label , created in 2009, is a reference framework for high energy performance renovations. By relying on a global approach, it makes it possible to significantly reduce energy consumption, while improving comfort and the heritage value of buildings.

BBC renovation: how does it work?

The BBC renovation is based on key principles, directly linked to the objectives of the Tertiary Decree:

Optimization of the thermal envelope : High-performance insulation of walls, roofs and floors to reduce energy loss.
Reduction of air leaks : Improve airtightness to limit parasitic thermal losses.
Installation of efficient equipment : Efficient and adapted heating, ventilation and air conditioning (HVAC) systems, often based on thermodynamic solutions or connections to heat networks.
Intelligent management of lighting and energy systems : Introduction of energy management systems (EMS) to optimize consumption linked to lighting, hot water production and ventilation

These renovations improve airtightness, energy efficiency and occupant comfort while reducing long-term operating costs. They even anticipate the obligations of the BACS decree linked to the implementation of a Technical Building Management system.

Download our White Paper on the BACS Decree

Compatibility between BBC renovation and DEET requirements

BBC renovation not only makes it possible to reduce energy consumption substantially, but also to meet DEET objectives in the short and long term. The *work of the Effinergie BBC Observatory shows that an investment of 440 €/m² SRT (thermal surface within the meaning of thermal regulations) on average for an office building and 530€/m² SRT for office buildings teaching makes it possible to achieve significant energy reductions. In addition, projects renovated according to the BBC label have demonstrated their compatibility with the requirements of the Tertiary Decree:

According to figures from CEREMA and Effinergie, 62% of renovated BBC office buildings comply with the reduction targets of -40% by 2030.
With adjustments to energy uses, these compliance rates can be further improved by 2040 and 2050.

Among the BBC renovated educational buildings, 92% comply with the requirement of the tertiary decree in relative value by 2030. These educational establishments can benefit from funding dedicated to the renovation of buildings with the EduRénov program.

EduRénov, a program of the Banque des Territoires , targets communities for the energy renovation of school buildings. It offers advice and financing for projects guaranteeing at least 40% energy savings. This initiative offers a significant chance to improve educational establishments that are often aging and energy-intensive, thus optimizing user comfort . Sobre Energie is a partner in this program and is involved in the energy audit aspect.

Learn more about the Edurenov program

At Sobre Energie, we can support you in your Tertiary Decree strategy and in prioritizing your energy performance actions:

Monitor your consumption on your EFA with the dedicated module on our DATAMARC platform
Prioritize your energy performance actions with our digital audits
Manage your actions with the advice of our energy managers