Scientists from ETH Zurich have identified the optimal concentration of carbon dioxide at which sleep and overall health are improved. The study was published in the scientific journal magazine Total Environmental Science (STTE).
Previous research has pointed to a link between bedroom air composition and sleep quality.
“Sleep is critical to our health, well-being and productivity. The bedroom is where we sleep and spend about a third of our lives. We have already investigated and confirmed the negative impact of inadequate ventilation in bedrooms on sleep quality, but only under laboratory conditions. There was no evidence to support this finding in a real-life context with controlled ventilation and other factors,” said Xiaojun Fan, lead author of the paper.
To examine the relationship between bedroom ventilation and sleep quality, researchers conducted extensive tests on 35 people. People aged between 27 and 64 were carefully selected to ensure that they did not have serious sleep problems or did not regularly take sleeping pills.
Throughout the four-week study, researchers continuously monitored various aspects of the participants’ bedroom environment and sleep patterns. They collected data on parameters such as carbon dioxide (CO2) concentrations, relative humidity, particulate matter (PM) levels and temperature. These measurements provided information about the air quality and conditions in each bedroom.
The team found that ventilation rates have a significant impact on CO2 concentrations. Specifically, carbon dioxide levels were significantly higher at the low ventilation rate setting; This was to be expected when airflow was limited.
Scientists have concluded that the optimal concentration of carbon dioxide in the bedroom for a good sleep should be less than 1000 units of carbon dioxide per cubic meter of air.
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