Living in housing with a good energy performance diagnosis (DPE) leads to a lower than expected reduction in real household energy consumption, according to a study by the Economic Analysis Council (CAE) published on Wednesday.
The DPEs, created in 2006, assess the energy consumption of a home or building and its impact in terms of greenhouse gas emissions. He is required to rent or sell accommodationand its method of calculation, quickly reformed in 2021, is still the subject of criticism.
DPE, energy audit… Are these mandatory diagnostics for your home reliable?
In the DPE established for housing and buildings, whose ratings can range from AG, those which are considered as energy or thermal strainers are rated F or G, most of the time due to lack of insulation or due to heating. to fossil fuels (gas, fuel oil) which are highly CO2-missive.
A gap between theoretical consumption and real consumption
In CAE study and Crdit Mutuel Alliance fédérale covering a sample of 178,110 households and relying in an unprecedented manner on banking data, the expert body attached to Matignon affirms that there are several reasons to believe that the theoretical consumption of DPE can differ significantly from actual household consumption.
The authors emphasize that there is indeed a progression in real consumption depending on the energy performance of housing, but that it is however much less strong than the theoretical consumption of the DPE. This progress fades as the surface area of housing increases, they add.
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