What is the main purpose of ventilation systems in mechanical engineering?

The primary purpose of ventilation systems in mechanical engineering is to provide fresh air and remove stale air from indoor environments. This is crucial for maintaining a healthy and comfortable atmosphere in commercial and residential buildings. Proper ventilation helps control indoor air quality by diluting and removing pollutants, such as carbon dioxide, volatile organic compounds, and airborne pathogens, which can accumulate in enclosed spaces.

Effective ventilation systems also support temperature regulation and humidity control, contributing to occupant comfort and the efficient operation of heating and cooling systems. By ensuring the continuous flow of air, these systems can mitigate the risk of issues like mold growth, airborne illness, and other health concerns associated with insufficient fresh air.

While some other options may relate to aspects of air handling or environmental control within a building, they do not encapsulate the fundamental role of ventilation systems, which is focused on the exchange of indoor and outdoor air to enhance overall indoor air quality.