Heat discomfort in French homes

During the summer of 2026, 69% of French people experienced uncomfortable heat levels in their homes, according to a Sofinco study that surveyed 1,023 individuals. This highlights a growing issue with how homes are rated for energy efficiency, particularly during heatwaves.

DPE ratings and summer challenges

Properties with high DPE ratings—A or B—are meant to be energy-efficient, but the study found that more than half of respondents felt their homes did not adequately protect them from high outside temperatures. Some homeowners report that insulation, while effective in winter, traps heat indoors during the summer.

Rising costs of summer cooling

Many households have invested in air conditioners and fans to combat the heat, leading to increased energy costs. However, these expenses are not factored into DPE calculations, which focus only on winter energy efficiency. This has led to frustration among homeowners who feel misled by the ratings.

Market response to summer discomfort

A significant portion of the French population now prioritizes summer comfort when buying a home, with 72% placing it above the DPE rating. Properties that are well-rated but uncomfortable in the summer are struggling to find buyers, affecting their market value and desirability.

Industry leaders voice concerns

Corinne Jolly, CEO of PAP.fr, explains that insulation designed to keep heat in during winter also traps it during summer, leading to uncomfortable living conditions. This has forced homeowners to choose between costly air conditioning systems or enduring the heat, which affects both their quality of life and property value.

Financial strain on homeowners

Some homeowners are burdened with debt from DPE-compliant renovations that have become financial liabilities. Others have abandoned further renovations due to a lack of funds, realizing that the expected return on investment is no longer guaranteed.

Misconceptions about DPE ratings

A Jinka x YouGov study found that 64% of the French believe a good DPE rating ensures comfort in the summer. However, the DPE only measures energy consumption and emissions related to winter heating, ignoring summer comfort. This has led to a gap between consumer expectations and the reality of the ratings.

Calls for reform

Political figures and industry leaders are demanding changes to the DPE system. Bruno Retailleau has proposed abolishing the DPE altogether, while 91% of the French public supports reforms that include summer comfort in the evaluation. Industry leaders argue that a more accurate rating system is essential to protect homeowners' purchasing power and address the growing issue of summer heat in homes.