Summer arrived early, prompting a renewed rush to buy air conditioners. The high temperatures observed since spring have caused millions of Italians to turn on their air conditioning systems, which have emerged as one of the key methods for dealing with increasingly regular heat waves. According to estimates from the Italian Society of Environmental Medicine, around 60% of Italian households now have at least one air conditioning system. This figure illustrates a significant shift in people's habits, given that little over ten years ago, fewer than one in every three homes possessed them. With rising average temperatures and a longer summer season, air conditioning has become an almost vital ally. Temperatures in several parts of the country exceed 30 degrees Celsius as early as May and continue hot until September, having a direct impact on the most vulnerable people's quality of life and health. Along with the positives, certain major challenges arise. On the one hand, there is the economic issue, which includes the possibility of higher electricity costs due to international tensions and shifting energy prices. On the other hand, there are the frequently underestimated health risks. Experts warn that extended use of air conditioners without appropriate ventilation can lead to the accumulation of contaminants in houses. Recent research indicates that air exchange, whether natural or mechanical, greatly reduces the concentration of volatile organic compounds and other potentially dangerous substances.