What is the main activity performed during Level 5 Commissioning?

Level 5 Commissioning primarily involves simulating the total building load using load banks. This step is crucial because it helps to validate the performance and capacity of systems under conditions that closely mimic actual operational scenarios. By applying load banks, the commissioning team can assess how well the mechanical and electrical systems perform when subjected to the expected demand from the building's operation.

In this phase, it is not just about verifying individual components of the system, but rather ensuring that the entire integrated system operates effectively as a whole. This includes identifying any performance deficiencies, inefficiencies, or potential challenges that could arise when the building is fully operational.

The other options focus on specific testing of equipment or aspects of installation that may occur during earlier stages of commissioning. However, Level 5 is distinctively centered on the overall performance validation through comprehensive load simulations.