Commissioning is the systematic process of testing, adjusting, and documenting HVAC system performance to ensure equipment operates according to design specifications and manufacturer standards. Conducted by qualified technicians or third-party agents, commissioning verifies that installed systems deliver intended heating, cooling, and ventilation performance. This process occurs after installation but before occupancy.
Commissioning Procedures
Technicians verify equipment nameplate data, test airflow rates using anemometers or duct flow hoods, measure temperature differentials, and confirm refrigerant charge levels. Duct leakage testing must show less than 8% loss at design airflow. All safety interlocks, thermostats, and ventilation controls are verified. Documentation includes test results, calibration certificates, and performance reports.
Code Requirements and Benefits
California Title 24, IECC, and ASHRAE 90.1 require commissioning for new construction and major renovations. Properly commissioned systems operate 5-15% more efficiently than uncertified installations. Commissioning identifies installation defects early, preventing costly repairs during warranty periods. Building owners receive confidence that systems will perform as designed and achieve projected energy savings.