Energy renovation is one of the pillars of public action in support of the energy transition. The latest illustration is the government's plan for the energy renovation of buildings, which provides for the renovation of 500,000 housing units per year for five years. Or the Prime Minister's June 2019 policy speech announcing a reform of renovation assistance. This priority is reflected in a multiplication of instruments 

But does the energy renovation of housing really reduce energy consumption as it claims?

In average investment that pays for itself in... 120 years

From 2000 to 2013, the survey institute interviewed a representative panel of 7 to 9,000 households each year about their energy expenditure and possible investments in renovation. Each household was surveyed for several consecutive years, allowing them to observe the evolution of their bills after renovation. Unfortunately, the investigation was stopped and more recent investigations no longer provide the same information.

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