Can air purification improve sleep quality? A 2-week randomised-controlled crossover pilot study in healthy adults

This randomized-controlled crossover pilot study examined how air purifiers affect sleep in 30 healthy adults over two weeks. Participants alternated between using an air purifier with a HEPA filter and a placebo filter. Results showed the HEPA filter condition increased total sleep time by an average of 12 minutes and time in bed by 19 minutes compared to the placebo. However, wakefulness after sleep onset also increased slightly. While air quality improved during the HEPA filter condition, no significant changes in mood or anxiety were observed. These findings suggest that air purification can modestly improve sleep duration, which supports overall brain health and cognitive performance.

Consider using an air purifier in your bedroom to improve sleep duration, particularly if you live in an area with poor air quality. Although the observed effects on sleep were modest, improved air quality may benefit sleep over time. Keep in mind that this study focused on healthy individuals without significant sleep issues, so benefits may vary. For those with persistent sleep disturbances, consult a healthcare provider for comprehensive treatment options.