HVAC (TAB) Testing, Adjusting and Balancing - these are the three steps used to achieve optimum operation of commercial HVAC systems.
Air or Hydronic testing is done to capture a snapshot of how systems or areas are performing. No adjustments are made during this process.
Air or Hydronic adjusting is done to either make a temporary or permanent change to the systems or areas.
Air or Hydronic balancing is done to achieve design flows in complete systems or areas.