What is the result of inadequate ventilation?

Inadequate ventilation leads to the accumulation of indoor pollutants because it prevents fresh outdoor air from entering a space and diluting or removing unwanted substances. Pollutants may include volatile organic compounds (VOCs), carbon dioxide, dust, mold spores, and other contaminants that are typically expelled by proper airflow. Without adequate ventilation, these pollutants can build up, which can lead to health issues, discomfort, and degraded indoor air quality. Thus, the presence of indoor pollutants can contribute to symptoms such as headaches, respiratory problems, and fatigue among occupants.

In contrast, increased energy efficiency, enhanced indoor air quality, and better humidity control are typically associated with sufficient ventilation, as fresh air helps reduce concentration of indoor contaminants and balance humidity levels.