OID-ADEME-CSTB Consortium: Demeter launches its data collection platform

In order to provide a detailed understanding of the energy functioning of the park, beyond the declarative framework set by the tertiary decree, the OID, ADEME and CSTB are jointly launching a call for contributions aimed at lessors, operators and managers of buildings, in order to provide data on energy consumption, use and materiality of their buildings.

The urgency of improving knowledge of the tertiary sector

The observation is clear: buildings in the residential and tertiary sectors alone represent 45% of final energy consumption and 16% of the territory's greenhouse gas emissions, barely less than industry excluding energy. (18%) and agriculture (19%)[1].

While the energy consumption of residential buildings is well studied, that of commercial buildings is notably less so. And yet, these generate 17% of final energy consumption.

Aware of this issue, in 2019 the State adopted the Tertiary Decree which sets ambitious objectives for subject buildings to reduce energy consumption over different time horizons: -40%, -50% and -60% respectively. in 2030, 2040 and 2050, compared to a reference year between 2010 and 2019.

However, the stock of tertiary buildings remains poorly known, due to the diversity of the buildings that make it up (offices, businesses, logistics warehouses, educational buildings, health establishments, hotels, etc.) and the great heterogeneity of use of these. Improving the energy performance of the park therefore first requires better knowledge of the energy functioning of tertiary buildings.

A collective effort to put data at the service of the energy transition of tertiary buildings

Knowing precisely the consumption profile of tertiary buildings requires access to precise data on the different characteristics impacting this consumption: physical characteristics, type of activity hosted, on-site energy systems, occupancy rate, intensity of use ... Being able to separate the contribution of the building from its use is particularly essential for the implementation of targeted policies. Numerous databases, disjointed and often fragmented, co-exist today.

The pooling and enrichment of these databases is now necessary if we want to move towards a faithful and precise description of the diversity of the tertiary building stock. This is the objective set by the DEMETER project (Data and Models on TERTIARY buildings), winner of the 2022 edition of the call for projects “Towards responsible buildings” supported by ADEME and bringing together a consortium of building and data experts: CSTB, Efficacity, Orange Business, Arcora and the Sustainable Real Estate Observatory.

The 4 pillars of the DEMETER project

DEMETER makes it possible to go beyond the regulatory obligation of the tertiary decree, in particular by providing a precise view of the consumption profile of typical buildings for the main categories of activity at the building level, complementary to the vision by entity functional subject (EFA) chosen by the tertiary decree. The data resulting from this work will make it possible to go beyond the information on the OPERAT platform on which those subject to the tertiary decree declare their energy consumption, and thus to guide public policies more effectively in terms of reducing consumption and emissions. greenhouse gas emissions from tertiary buildings.

This project, whose name is inspired by the Greek goddess of harvests, is based on several pillars:

• An exhaustive inventory of existing freely accessible databases on the tertiary sector (for example the National Buildings Database)
• Automatic collection of data not requiring consent (e.g. measuring building occupancy via aggregated and anonymized mobile data)
• Targeted automatic collection of very detailed consumption data and detailed characteristics of buildings requiring consent
• The creation of archetypes of tertiary buildings and energy models associated with varied activity uses and allowing more detailed modeling of the tertiary park for decision-making purposes in the context of the sector's energy transition.

In order to collect this data, a dedicated platform has been created. Fun and easy to use, it will allow owners, managers and operators of tertiary buildings to provide precise information on them: data from smart energy meters, detailed usage, occupancy scenarios and material characteristics. The platform has been open to the public since May 1, 2024.