France heatwave spikes demand for air‑conditioners, cool rentals and water‑intensive data centres

France is experiencing an intense heatwave that is reshaping consumer behaviour and infrastructure use. 75 % of French homes lack air‑conditioning, prompting many DIY installations of fixed split units; French law permits self‑installation but requires a certified technician for the refrigerant service, which costs about €300. The high price of professional installation (≈ €2 000) has driven interest in self‑install kits.

Airbnb is promoting five “cool‑stay” properties—pool‑equipped villas near Lyon, a floating suite on the Seine, a climatised loft near Toulouse and a seaside retreat on the Mediterranean—as an alternative to staying in overheated homes. A July 2026 survey of 4 101 French respondents found that 65 % would pay more for accommodation with cooling, and 57 % now list air‑conditioning as a key booking criterion.

The heatwave is also exposing environmental costs. Studies around Phoenix show data‑centre clusters raise nearby temperatures by up to 2.2 °C and consume over 25 million litres of water per megawatt annually; similar concerns are rising in French data‑centre hubs. Retailers have opened cooling stations, and French shoppers are buying air‑conditioners, ice‑cream and non‑alcoholic beers in larger volumes.

Energy experts advise adjusting indoor thermostats from the traditional 26 °C setting to 24 °C when outdoor temperatures exceed 25 °C, saving up to 7 % of electricity per degree. Additional tips include regular filter cleaning, shading windows, and using eco‑mode functions. Portable cooling gadgets such as the Shark ChillPill 3‑in‑1 fan have also entered the market to meet immediate personal cooling needs.