Stale air is associated with unpleasant feelings in the indoor environment.
People often associate it with high concentrations of Carbon Dioxide (CO2). However, CO2 at low levels is not harmful to health by itself. Along with the concentration of CO2, the concentration of other substances in the air also rises, and it is these that cause the manifestations of stale air.
Carbon dioxide rises very similarly to these other substances, but (unlike the others) it is easily measured and thus serves as a great indicator of indoor air quality.
| POOR CONCENTRATION | ![]() |
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INEFFECTIVE MEETINGS |
FATIGUE, SLEEPINESS |
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HEADACHES |
POOR SLEEP |
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NAUSEA AND DIZZINESS |
Measuring and ventilating is the foundation for a comfortable indoor environment and good air quality. This is especially true for dense urban areas and regions with high outdoor air pollution. Monitoring and preferably subsequent control of ventilation will ensure ideal air quality in the indoor environment.