A Commissioning is Start-up of a building that includes testing and adjusting HVAC, electrical, plumbing, and other systems to assure proper functioning and adherence to design criteria. COMMISSIONING also includes the instruction of building representatives in the use of the building systems.

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Other /More definition:
A COMMISSIONING is Start-up of a building that includes testing and adjusting HVAC, electrical, plumbing, and other systems to assure proper functioning and adherence to design criteria. COMMISSIONING also includes the instruction of building representatives in the use of the building systems.