Improve bedroom air quality and ventilation

What to Do

Crack a window or run an air purifier in the bedroom. Maintain humidity between 30-50% using a humidifier or dehumidifier as needed.

Why It Works

CO2 levels in closed bedrooms can exceed 2,500 ppm overnight — levels associated with poorer sleep quality and reduced next-day cognitive performance. Fresh airflow keeps CO2 low and oxygen levels adequate. Optimal humidity prevents airway irritation (too dry) and mold growth (too humid).

Tips

• Even a small window opening makes a significant difference in CO2 levels
• HEPA air purifiers also help with allergens (dust mites, pollen) that cause nasal congestion and snoring
• If outdoor air is polluted or noisy, a purifier with a quiet fan setting is the better option
• A simple hygrometer ($10-15) lets you monitor humidity levels