When electric fans stop cooling and start heating: The temperature thresholds explained
By
Michael Le Page
Summary
The article explains that during extreme heatwaves, electric fans can actually make you hotter rather than cooler once temperatures exceed certain thresholds. It examines conflicting guidance from the UK government (35°C/95°F) and the World Health Organization (40°C/104°F), and notes that factors like humidity, age, and individual physiology affect the tipping point. The piece provides practical advice on when to turn off fans and switch to other cooling methods during dangerous heat conditions.
Source
bskyWhen electric fans stop cooling and start heating: The temperature thresholds explainednewscientist.comKey quotes
· 3 pulledThe UK government warns fans may not prevent heat-related illnesses above 35°C (95°F), whereas the World Health Organization says the tipping point from cooling to heating occurs at 40°C (104°F).
With Europe in the grip of a mega heatwave and deaths already being reported, staying cool isn't just about comfort – for many, it is a matter of life and death.
Fans can flip from cooling you to warming you.
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