The Conservative Party has pledged to repeal regulations that restrict the installation of air conditioning units in new homes, arguing that current rules leave residents exposed to dangerous heat without adequate cooling options. The move comes amid record-breaking temperatures in the UK, with Kew Gardens in west London registering 35°C on Tuesday, the hottest May day ever recorded in the country.

Since 2021, building regulations have effectively prohibited air conditioning in new residential developments except as a last resort, prioritizing passive cooling methods such as window shading and cross-ventilation. The rules were introduced under a Conservative government to support environmental goals, limiting the use of energy-intensive cooling technologies to help meet net-zero carbon emissions targets.

Claire Coutinho, the shadow energy secretary for the Conservatives, criticized the current framework, stating that the UK is "one of the only major economies" that relies on enduring extreme heat rather than using air conditioning. She called the restrictions “outdated” and said they should be removed to allow developers greater freedom to install air conditioning systems in new builds. Coutinho emphasized that such technology "is proven to save lives, boost productivity and make people more comfortable," and that energy policy should prioritize public needs.

In contrast, Labour ministers defended the regulations last year, warning that expanding the use of air conditioning would increase electricity demand and jeopardize the government’s net-zero ambitions. Samantha Dixon, the building safety minister, told Parliament in September 2023 that air conditioning was neither financially efficient nor desirable due to its high energy consumption and the additional strain it would place on the national grid.

Current rules require builders to demonstrate that all passive measures to prevent overheating have been exhausted before air conditioning can be installed. Only about 3% of UK homes have air conditioning, compared with significantly higher rates in countries like Germany, France, the United States, and Japan.

Experts warn that rising indoor temperatures can have serious health implications, particularly for vulnerable groups such as young children, the elderly, and those with chronic illnesses. Studies have linked overheating homes to reduced productivity, impaired learning in children, and poor sleep quality, underscoring the growing concern as heatwaves increase in frequency.

The heatwave accompanying the record temperatures has also led to several tragic accidents. At least six people, mostly teenagers and children, have drowned in open water since the onset of the hot weather. Rescue organizations, including the Royal National Lifeboat Institution and the National Fire Chiefs Council, have issued warnings about the dangers of swimming in lakes, rivers, and the sea during the heatwave. Sudden immersion in cold water can cause hyperventilation and cardiac distress, posing serious risks to swimmers. The recent fatalities highlight the urgent need for public awareness and safety measures alongside any policy reforms addressing heat protection in homes.