What is 'ventilation' in the context of HVAC?

Ventilation, in the context of HVAC, refers to the process of replacing or exchanging air within a space to maintain acceptable indoor air quality. This involves bringing in fresh air from outside while expelling stale air from inside. Proper ventilation is essential for controlling humidity levels, removing pollutants, and providing a comfortable and healthy environment for occupants. It plays a crucial role in ensuring that the air within a building is clean, fresh, and breathable.

Additionally, ventilation can be implemented through various systems, such as natural ventilation (using windows and openings) or mechanical ventilation (using fans and ducts), depending on the design and requirements of the building. The focus on air quality highlights the importance of adequate ventilation in preventing issues like mold growth, odors, and the buildup of harmful gases, making it a fundamental aspect of effective HVAC design.