Which system is responsible for removing air from compartments and circulating stale air?

The exhaust system is designed to remove air from compartments and effectively circulate stale air out of a space. This is essential in maintaining a healthy indoor environment, especially in settings where air quality can be compromised, such as industrial or commercial facilities. By creating a negative pressure within a space, the exhaust system draws stale air outside, allowing fresh air to replace it, thus preventing the buildup of contaminants.

In contrast, the fresh air supply system focuses on bringing in clean air from outside but does not actively remove stale air. The re-circulation system takes air from within a space, filters it, and returns it, which may not be effective for environments where contaminants are present. The natural ventilation system relies on external elements like wind and temperature differences to induce airflow, which can be variable and may not fully address the removal of stale air. Hence, the exhaust system is specifically designed to fulfill the requirement of air removal and stale air circulation.