Fans, often used to cool down during heat waves, have been revealed to be less effective and safer than previously thought, especially for older adults. A new study conducted by Australian and Canadian scientists has shown that the benefits of fans vary depending on the ambient humidity and can be harmful in some cases.

Fans can be dangerous for older adults

Researchers led by the University of Sydney conducted tests on individuals over the age of 60. They found that using a fan in humid and hot conditions (60% humidity, 38°C) slightly reduced body temperature and increased comfort, but did not reduce the workload on the heart. Although participants felt cooler, the body’s internal heat accumulation continued.

The most striking finding of the study occurred in extremely hot and dry conditions (45°C, 15% humidity). Instead of cooling the body, the fan operated under these conditions acted like an oven, increasing body temperature by 0.3°C. This is considered a serious risk, especially for older adults with cardiovascular disease.

The researchers added that wetting the skin and sitting in front of a fan increased comfort but did not significantly reduce body temperature.

The study’s results emphasize that fans alone are not a sufficient solution to combat heat waves. Experts emphasize that measures such as access to air-conditioned spaces, community cooling centers, and more detailed public warnings are crucial for protecting the elderly, especially those in at-risk groups.