Electric fan fans space in for part bittersweet news. A new study out Monday argues that while pan can assist people cool down on hot and also humid days, in hot and arid atmospheres they may actually do you an ext uncomfortable—and may also be unsafe.

You are watching: Do fans make a room hotter


The researchers, based in ~ the university of Sydney in Australia, recruited 12 healthy and balanced college-aged men for your experiment. The shorts-wearing men were asked come sit in a room for two hrs at a time in four very unpleasant scenarios.


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For one pair of scenarios, the room was heated come 104 levels Fahrenheit, with a loved one humidity the 50 percent, amounting to a heat index (the temperature it actually feels like) of 132.8 levels Fahrenheit. In the other scenarios, the room was heated to 116.6 levels Fahrenheit, through a family member humidity the 10 percent, making because that a lower heat index of 114.8 levels Fahrenheit. Half the time, the men sat in prior of a typical electric fan.


Before and after the experiments, the men had their love rate, sweat level, and also body temperature measure (rectally, unfortunately), and they likewise reported how normally comfortable castle felt.


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As you might expect, it no a good experience no matter which scenario it was. But the males did report feeling twice as comfortable in the hot, humid room once the fan was on than when it wasn’t. Their body temperature and level the cardiac stress and anxiety was slightly reduced when the fan was on, though they walk sweat more, increasing the danger of dehydration.

But once the pan was on in the hot and also dry room, the men fared worse ~ above every measure compared to the no-fan scenario, despite the room “feeling” less hot than the high-heat-and-humidity version.


Currently, establishments like the eco-friendly Protection firm advise that people not use fans once the warmth index is over our body temperature, or 99 levels Fahrenheit. The logic goes the fans have the right to actually cause more strain ~ above the body at that temperature and also above, by blasting us v air warmer than our skin and also making united state hotter with convection.

But the study’s results, published in the Annals of internal Medicine, it seems ~ to present that relying on warm index alone might not be the best method to call if utilizing a fan is helpful, according to the authors.


“These result highlight issues that may arise once values are used to recommend fan use throughout heat waves,” they wrote.

The study’s conclusions should be taken v some guarded skepticism, as even the writer admit. Twelve volunteer is not a lot of civilization for a study, and also two hrs isn’t a many time to basic a comparison on. We likewise can’t be certain these effects would it is in seen, and also to what extent, in other teams of people. Maybe for people who room taking details medications, or who just came ago from a workout, pan might impact them in different way during either sort of warm day.


Still, there could be part room because that comfort because that people living in areas where hot and humid summers are the norm, however air conditioners are not. In areas such together the South main United States, southern Australia, and also the center East, where warm waves often tend to be reasonably dry, fans might not it is in advisable, the writer wrote.

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“However, in much of the remainder the the unified States, south-east Asia, south America, and also Europe, temperatures seldom exceed <104 levels Fahrenheit> but are attach by moderately high humidity,” castle added. “In these regions, fans might be motivated as a cheaper and available alternative to air air conditioning that additionally limits net electrical energy demand and carbon pollution.”


I find the results of this research a little bit fanatical and based more in fantasy 보다 reality. Together both a fan of fans and a fan of pan fans, i was no blown away by the analysis of the results as I uncovered it a bit long winded.