What is the primary function of a variable air volume system?

The primary function of a variable air volume (VAV) system is to adjust the volume of air delivered to different spaces in response to the varying heating or cooling demands of those spaces. This is achieved by modulating the airflow so that when a room requires more cooling or heating due to changes in occupancy or external temperature, the system increases the volume of air delivered. Conversely, if less heating or cooling is needed, the system reduces the airflow.

This capability allows for enhanced energy efficiency, as it delivers only the amount of air needed for comfort rather than maintaining a constant flow regardless of demand. The system's design optimizes comfort levels while reducing energy consumption, making it ideal for modern HVAC applications.

The ability to modulate air volume in response to real-time needs also leads to more consistent temperature control and improved air quality, as air distribution can adapt to varying loads that occur throughout the day.