As the UK braces for a heatwave with temperatures potentially reaching 30°C, seven health experts have weighed in on whether it is safe to keep a fan running overnight. The consensus is that it is generally acceptable and can improve sleep comfort, though some precautions are advised.
Dr Luke Powles, Clinical Director at Bupa Health Clinics, said: "If you find sleeping with the fan on all night provides you with relief from the heat, it's fine to continue doing so." However, he warned that prolonged use could dry out skin or nose, or aggravate allergies. He suggested using oscillate mode or avoiding direct airflow.
Chris Tattersall of Woolroom recommended ceiling fans run counter-clockwise at high speed to maintain airflow. He advised using any technique to achieve the ideal bedroom temperature of 18°C. Superdrug's Pharmacy Director Craig Watt echoed the benefits but noted potential dryness of nose, throat or eyes, recommending hydration and saline spray.
Dr Deborah Lee of Dr Fox Online Pharmacy highlighted a dual advantage: "It causes a wind-chill factor which helps cool you down, plus the breeze speeds up the evaporation of sweat." She suggested placing a bowl of ice in front of the fan for a cold spray. Cooling expert Matt Ladell advised using the fan to cool the room initially rather than directing it at the body all night, positioning it near an open window when outside air is cooler.
