What does the term 'ventilation' specifically refer to in HVAC systems?

The term 'ventilation' specifically refers to the process of removing stale air and replacing it with fresh air within a space. This is a fundamental aspect of HVAC systems as it helps to ensure a healthy indoor environment by bringing in outside air while expelling indoor air that may have accumulated pollutants, moisture, and odors. Proper ventilation improves air quality, supports the comfort of occupants, and reduces the risks associated with poor indoor air conditions, such as respiratory issues or the buildup of harmful substances.

In HVAC systems, ventilation can occur naturally through openings and windows or mechanically using various types of fans and ductwork. The objective is to maintain an adequate supply of fresh air, which is critical for the longevity and effectiveness of the system itself as well as the well-being of the building's occupants.