Luftkonditionierung löst Heatwave-Probleme nicht, warnt EU: Welcher Plan für die Kühlung von Städten wird in Brüssel diskutiert?

The European Union has issued a warning that air conditioning alone cannot solve the problem of heatwaves, emphasizing instead the need for broader strategies to cool cities and adapt to rising temperatures. As heatwaves become more frequent across Europe, officials in Brussels are working on a new climate strategy aimed at promoting green spaces, shading buildings, and other measures designed to mitigate the effects of extreme heat. This approach comes amid growing concerns over the increasing demand for cooling solutions and their potential impact on energy consumption and infrastructure.

According to discussions among European Commission officials, while air conditioning is essential during periods of intense heat, it should not be considered the primary solution for urban adaptation. Officials have noted that passive cooling methods such as building shading and thermal insulation are not always sufficient, but they also highlight the risks associated with relying heavily on air conditioning. These include increased electricity consumption, the need for additional energy production capacity, and higher costs for consumers, particularly given the current high prices of energy. Additionally, widespread installation of air conditioners could exacerbate the "urban heat island" effect, where residual heat generated by these devices raises local temperatures further.

In response to these challenges, the European Commission is advocating for a holistic approach that combines both passive and efficient cooling technologies. Rather than encouraging mass installation of air conditioning units, the focus is shifting towards designing cooler cities through intelligent planning, better insulation, and creating more shaded areas. The goal is to reduce reliance on air conditioning where possible and ensure its use is reserved for situations where it is truly necessary.

European officials recognize that portable air conditioners remain popular due to their ease of installation, but they caution that these are significantly less energy-efficient compared to fixed systems. Modern fixed air conditioning units are described as highly efficient, many functioning as reversible heat pumps capable of contributing to both heating and cooling efficiency. Regulatory improvements since 2002 have enhanced the performance of these systems, and further legislative updates are being prepared to maintain this trend.

However, the installation of air conditioning systems is typically regulated at the regional or local level. Urban planning permits are often required for installing sun-shielding facades or air conditioning systems, which means that the implementation of such measures varies widely across member states. This regulatory complexity underscores the need for coordinated efforts to address the challenges posed by increasing heatwaves.

As summer approaches, the pressure on energy systems is becoming increasingly evident. In Romania, for example, the country is experiencing a period of extreme heat, with temperatures expected to reach record levels. This has led to a significant increase in electricity consumption, particularly during afternoons and evenings when air conditioning usage overlaps with general residential and commercial consumption. Similar patterns are observed across Europe, where approximately 45% of the 800 cities analyzed are located in areas of high thermal stress, affecting energy demand, distribution infrastructure, and wholesale electricity markets.

In France and the United Kingdom, recent heatwaves have exceeded historical records for late June, highlighting the structural calibration of urban and energy systems toward heat retention rather than dissipation. This mismatch between existing infrastructure and the realities of rising temperatures is causing significant strain on energy networks, necessitating rapid adjustments to balance supply and demand based on the intensity and duration of heatwaves.

The increasing frequency of heatwaves is reshaping energy consumption patterns across Europe. In France, for instance, only about 25% of households are equipped with air conditioning, compared to around 50% in Italy and Spain, and nearly 90% in the United States and Japan. Analysts note that in countries like Singapore, the development of air conditioning has historically been linked to economic productivity, indicating a structural transformation in urban economies driven by cooling needs.

The debate surrounding air conditioning remains sensitive in Europe, especially in France, where discussions oscillate between energy efficiency considerations and environmental impacts. Critics point to the additional energy consumption and the use of refrigerants, while the urban heat island effect—where hot air expelled by air conditioners can raise local temperatures by 2–3 degrees—is another concern. However, recent heatwaves have shifted the conversation from limiting air conditioning use to expanding access to cooling in public buildings, including schools and hospitals. In France, thousands of educational institutions were temporarily closed, and hospitals resorted to using mobile air conditioning units in the absence of permanent infrastructure.

France's energy system is currently under seasonal pressure, with the country facing unique challenges in meeting the growing demand for electricity. With approximately 95% of its electricity production coming from nuclear power, the flexibility needed to manage peak loads during heatwaves is limited. This situation highlights the urgent need for comprehensive strategies to address the dual challenges of rising temperatures and energy security, ensuring that European cities can adapt effectively to the changing climate without compromising sustainability or affordability.