New findings suggest air conditioners can blow around infected droplets hanging in the air -- with enough air movement, your nose can pull in large particles. Unless systems consistently pump in outside air, there's a risk. hereandnow
The study looks at a woman in China who dined at a restaurant days before she showed COVID-19 symptoms. Researchers say she infected four people at her table and five at other tables because an air conditioner behind her spread droplets from her speech.
Some increasingly popular systems recirculate the air but don't bring in fresh air or provide filtration. Called splits, these air conditioners are popular because of their energy efficiency, he says.Building managers and property owners need to look into how air is circulating through their space. Through air dilution or ventilation coming from outdoors, researchers find each person in a room should have 5 to 10 liters of fresh or filtered air per second, he says.
New data shows sunlight does work as a disinfectant, he says, though sunlight can’t kill the virus if someone is already infected. Light within the UVC range can cause sunburns and damage your eyes, he says, though it doesn’t penetrate the skin well or pose a big risk of cancer.
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