How does a variable air volume (VAV) system primarily function?

A variable air volume (VAV) system primarily functions by varying the amount of airflow based on demand. This approach allows the system to adjust the volume of air delivered to different spaces within a building according to the specific heating or cooling needs of those areas at any given time.

In practice, the system uses sensors to monitor temperatures and occupancy levels. When a space requires more heating or cooling, the VAV system increases the airflow to that area. Conversely, if the demand decreases, the system reduces the airflow. This on-demand modulation not only enhances comfort for occupants but also promotes energy efficiency, as it avoids the constant flow of air that can lead to wasted energy.

Understanding this functional principle highlights the smart and adaptable nature of VAV systems, making them efficient and responsive to changing environmental and occupancy conditions within a building.