Air terminal units (ATU) are zone-level air distribution devices that regulate airflow for maximum occupant comfort. The ATU controls the zone space temperature to maintain a desired occupied space temperature. In variable air volume (VAV) systems, the flow of air is supplied by a single air handling unit. ATUs are available with pneumatic or digital controls. Low noise levels and available space are important considerations when selecting these units.

Air terminal units (ATU) are zone-level air distribution devices that regulate airflow for maximum occupant comfort. The ATU controls the zone space temperature to maintain a desired occupied space temperature. In variable air volume (VAV) systems, the flow of air is supplied by a single air handling unit. ATUs are available with pneumatic or digital controls. Low noise levels and available space are important considerations when selecting these units.