What are the two primary functions of ventilation?

The two primary functions of ventilation are to provide oxygen and remove carbon dioxide (CO2) and odors. This is essential in maintaining indoor air quality because adequate ventilation ensures that fresh air is introduced into a space, which is necessary for the well-being of occupants. Oxygen is a critical element for human respiration, and by facilitating its influx, ventilation supports healthy air levels.

Simultaneously, ventilation is responsible for the expulsion of carbon dioxide, a byproduct of human respiration and various indoor activities. High levels of CO2 can lead to drowsiness and decreased cognitive function, highlighting the importance of effective ventilation in preventing such issues. Additionally, the removal of odors contributes to a pleasant indoor environment, which impacts comfort and overall satisfaction with a space.

Other choices address important aspects of indoor air quality but do not encapsulate the primary functions of ventilation. While humidity regulation, temperature control, and filtering dust are significant for overall comfort and health, they are secondary to the fundamental need for oxygen supply and CO2 removal in maintaining a safe and suitable indoor environment.