What is the primary concern with improper ventilation in HVAC systems?

The primary concern with improper ventilation in HVAC systems revolves around the accumulation of indoor pollutants. When ventilation is insufficient, contaminants such as carbon dioxide, volatile organic compounds (VOCs), dust, mold spores, and other pollutants can build up in the indoor air. This can lead to poor indoor air quality, which can harm the health and well-being of occupants.

Good ventilation is essential for diluting and removing these pollutants, as well as for introducing fresh outdoor air. When air is not properly circulated and filtered, it can lead to respiratory issues, allergies, and a general decline in comfort and air quality within a space. Thus, ensuring effective ventilation is fundamental in maintaining a safe and healthy indoor environment.