Which system is responsible for ensuring indoor air quality by removing stale air?

The system responsible for ensuring indoor air quality by removing stale air is the ventilation system. Ventilation plays a crucial role in maintaining a healthy indoor environment by diluting and displacing pollutants and stale air. This system works by bringing in fresh outdoor air while exhausting indoor air, thus effectively managing humidity, temperature, and odor levels within a space.

Unlike heating and cooling systems, which primarily focus on temperature regulation, or fuel systems, which deal with energy supply for heating, ventilation is specifically designed to address air quality through the exchange of air. This process is vital for preventing the accumulation of indoor contaminants, such as carbon dioxide or volatile organic compounds, that can arise from various sources including building materials, furniture, and occupant activities. By ensuring proper ventilation, indoor environments can remain comfortable and healthy for occupants.