Hired for twenty years in favor of sobriety, experts from the Negawatt association have quantified the impact of a series of possible short -term changes, mainly in the building sector.
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How to reduce France’s energy consumption by 10 % by 2024? The government, which has set this objective to deal with the double challenge of the energy and climatic crises, should present on October 6 a first action plan. To feed reflections, the Negawatt association, engaged on this theme for twenty years, has quantified for the first time the potential impact of fifty measures, mainly in the building. This sector is strategic: the residential building represents 30 % of energy consumption (450 terawatt hours) and the tertiary 16 % (245 TWh). On the front line in the face of the risk of supply of supply, it is also the one for which Negawatt has the most expertise and feedback.
According to the association, which publishes the result of its work Tuesday, September 27, the 10 % target is completely achievable. “We could even go further, notes Stéphane Chatelin, its director. Without looking at the industrial sector, we reach a 13 % drop in cumulative consumption of gas, electricity and oil with this first series of measures in the Building and three measures in transport. But the issue will be that of the conditions allowing them to be implemented. “
These fifty measures have not been retained at random: all can be quantified, implemented in the short term, with a zero or low cost, and be acceptable by the population. “Even if our costing is based on calculations and concrete cases, this remains hypotheses with a margin of uncertainty”, specifies Samuel Martin, member of the association and a design office specializing in mastering the ‘Energy.
19 ° C instead of 21 ° C
Among the main deposits of savings identified in the residential, in the first place is heating. If 80 % of housing – Negawatt automatically excludes those of the elderly, sick, etc. – heated themselves at 19 ° C, as the energy code already foresees, 23.5 TWh could for example be saved. According to various studies, households today settle their radiators at 21 ° C on average.
Extremely important consumption declines (around 18 TWh) are also possible regarding hot water, in particular by installing flow limitators on taps and insulating covers on hot water balls sanitary. “We knew how to make masks during the pandemic, we can make insulating jackets and enhance them in consultation with industrialists,” says Samuel Martin.
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