French experts and public agencies are promoting low-cost techniques to keep homes cool as a heatwave affects the country this month.

These strategies aim to reduce reliance on energy-intensive air conditioning to lower electricity bills and protect public health during extreme temperatures. The push comes after a record heatwave in May 2026 [4].

Nicolas Pichot, chargé de mission Rénov’actions 42, said there are five specific tips to conserve coolness within a residence [2]. These recommendations include painting windows white to reflect sunlight and using wet sheets to lower ambient air temperature [1].

Other agencies, including the service de rénovation énergétique de Quimperlé Communauté, are hosting local guidance sessions. One such community workshop was held on June 9, 2026, to provide residents with practical cooling advice [3].

Natural ventilation remains a primary focus for these experts. They said to close shutters during the hottest part of the day and reopen them at night to allow cooler air to circulate [1]. While some sources suggest a precise hour for closing shutters, others said the timing should simply align with the peak heat of the day [1].

Financial publications have also listed five natural solutions to manage indoor heat without mechanical cooling [5]. These methods focus on behavioral changes and minor home modifications that do not require significant investment. The goal is to maintain a livable environment as European temperatures continue to fluctuate during June 2026 [1].

By focusing on these accessible methods, French agencies hope to mitigate the health risks associated with heat exhaustion, especially for those in older housing that lacks modern insulation.

“French experts and public agencies are promoting low-cost techniques to keep homes cool”

The shift toward promoting non-electric cooling methods reflects a broader European effort to manage energy grids during peak summer demand. By validating low-tech interventions, public health agencies are attempting to bridge the gap for low-income residents who cannot afford air conditioning while simultaneously reducing the carbon footprint of heat mitigation.