Your bedroom could be the unhealthiest room in your home
Close the door, shut the windows and turn up the heat, and you have all the ingredients for a sick bedroom in your home—and you spend about eight hours there every night.
Your bedroom could be the most unhealthy room in your home. You spend about eight hours there each night, yet many overlook its air quality. Kitchens and bathrooms often get blamed for stale air and dampness, but researchers found that carbon dioxide (CO₂) levels in airtight, naturally ventilated homes across Scotland were often unsafe.
Despite this, most occupants believed their bedroom's air was good. The reason lies within you. When you're awake, you may open a window or close it to regulate temperature, but once asleep, you stop doing this. This allows CO₂ and moisture to accumulate, leading to poor air quality. High CO₂ levels act as a proxy for stale air.
For reference, CO₂ levels in fresh outdoor air are typically between 420 and 450 parts per million (ppm), while unhealthy levels in bedrooms can reach up to 1,800 ppm. European standards allow living spaces to reach 1,350 ppm above outdoor levels, but bedrooms should only be 950 ppm above outdoor levels. During winter, bedrooms spend roughly two hours every night above unhealthy levels, while living rooms next door remain fine.
This is because people keep their windows shut in winter to stay warm and open them in summer. High humidity can lead to mold growth, which can be particularly dangerous for small children whose lungs and immune systems are still developing. Opening windows to clear stale air and moisture can help, but it also lets heat out. Trickle vents, often shut after energy upgrades, can help maintain a balance between fresh and warm air.
In Ireland, a study of retrofitted homes found that bedrooms had higher CO₂ levels after the work than before, with about half showing visible mold. This is a similar issue to sick building syndrome experienced in the 1970s when offices were sealed to save fuel. To improve air quality in your bedroom, consider opening windows for 10-15 minutes after waking up to purge stale air and moisture, using a dehumidifier to control humidity, and installing trickle vents for background airflow. Indoor air quality monitors can provide definitive proof of bad air quality in your bedroom.
Written by urgent.news from Medical Xpress's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
