If the amount of carbon dioxide in a workplace is greater than 1000 Per million (ppm) it can cause drowsiness and complaints of stale air.

In more severe cases, high levels of carbon dioxide can lead to headaches, dizziness, shortness of breath, and an increased heart rate. Prolonged exposure to elevated levels of carbon dioxide can also have negative effects on overall health, such as worsened asthma symptoms and chronic respiratory issues. It is important for employers to monitor and control indoor air quality, including carbon dioxide levels, to ensure a healthy and safe work environment for employees. This can be done through proper ventilation and air filtration systems, as well as regular air quality testing.