New publications
Scientists have proven that fans don't save you from the heat wave
Last reviewed: 01.07.2025
All iLive content is medically reviewed or fact checked to ensure as much factual accuracy as possible.
We have strict sourcing guidelines and only link to reputable media sites, academic research institutions and, whenever possible, medically peer reviewed studies. Note that the numbers in parentheses ([1], [2], etc.) are clickable links to these studies.
If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please select it and press Ctrl + Enter.
It turns out that the usual fan cannot save anyone in the heat. Unlike air conditioners, fans do not actually cool the air, but bring in cold air from outside if you place it next to a window. And if the temperature outside is already above all norms, then the flow of hot air can only increase the body temperature.
On the one hand, a person still feels the breeze coming from the fan. However, when hot air circulates, sweat is released too intensely, and this accelerates the risk of heat stroke.
Excessive sweating can cause dehydration and electrolyte imbalances. If the lost fluids are not replenished quickly enough, there is a high chance that the fan will do more harm than good. This issue is especially worrisome for those at higher risk of illness, especially heart disease, writes Raut.
Older adults and children are more vulnerable to extreme temperatures, in part because they are less likely to recognize the symptoms of excessive heat exposure.
A new study in the Cochrane Library has important public health implications because people are increasingly relying on fans in the mistaken belief that they will make them feel better. But these mistakes are leading to people unknowingly setting themselves up for heatstroke.
[