An
approved field test method shall be used to evaluate
design air flow rates and demonstrate
proper capture and containment performance of
installed commercial kitchen exhaust systems.
Where demand ventilation systems are utilized
to be in accordance with Section E503.5.11.2.1,
additional performance testing shall be provided
to demonstrate proper capture and containment
at minimum airflow. [ASHRAE 90.1:6.5.7.2.4]