VAV system performance - field characterization of airflow, system diagnosis tools, and operational design implications.

A field study investigated outside air delivery and thermal comfort in a normally operating variable-air-volume (VA V) system. In addition to finding that outside air delivery and thermal comfort are generally acceptable under a variety of operating conditions, a number of practical diagnostic techniques were used to more fully understand VA V system operation and design. It was concluded that unless a VAV system is well understood or continuously monitored, the likelihood of unexpected system behavior that can impact the outside air delivery and thermal comfort is high.