PTAC and HVAC systems commissioning should verify that installed equipment is appropriate for the application and operates according to the manufacturer's requirements and project specifications.

Depending on the system, testing may include electrical verification by qualified personnel, thermostat communication, heating and cooling operation, airflow, operating modes, condensate management, and control responses.

Where multiple systems interact, commissioning may also verify relevant building or energy-management integrations. Hotels should document deficiencies and correct them before considering the installation complete.