What is the main advantage of a variable air volume system?

The main advantage of a variable air volume (VAV) system lies in its ability to adjust the airflow dynamically to meet the specific heating or cooling needs of different areas, or zones, within a building. This feature allows for a more customized approach to climate control, which improves comfort for occupants and can also lead to more efficient energy use.

By varying the airflow based on real-time demand, a VAV system can effectively respond to changes in occupancy or varying thermal loads in different areas of a building. This not only optimizes the indoor environment but also minimizes energy waste, as the system lowers airflow when less heating or cooling is required. This adaptability is particularly beneficial in buildings with large fluctuations in space usage or in spaces where different conditions are needed at different times.

Thus, this capability to tailor airflow to meet the specific requirements of each zone is the primary distinctive advantage of a VAV system compared to fixed airflow systems, where consistent airflow is maintained regardless of actual demand.