Updated: Jan 8, 2021
We all know commissioning is the process of confirming that the completed building and systems meet the design criteria for function and capacity after construction, but what is retro-commissioning?
The retro-commissioning process can uncover inherent flaws in building operation or design that become evident over time due to load growth or new operating procedures.
Retro-commissioning is the commissioning of an existing active facility. This can take the form of the full commissioning of a facility that has never been commissioned or the commissioning of the existing system to ensure that the system still functions with the same efficiency and expected operation as it did when first commissioned and occupied.
Retro-commissioning is not a new process. EYP MCF Inc. has been doing it for decades. Sometimes it is the confirmation of a UPS system operation after the annual maintenance, and sometimes it is the verification of the BMS system operation after a software upgrade. The basis for the process is vested in the overall ASHRAE Commissioning process of Level 4 and Level 5 testing.
Many times energy savings can be found though proper adjustment and verification of proper system operation.
Retro-commissioning can also take the form of energy audits, energy monitoring and the rebalancing of the air and water in the facility following installation of a new piece of equipment. Testing and Balancing of an existing facility is always important to verify that water and air flows have not been modified in ways that can damage equipment or cause hot spots. The retro-commissioning process can uncover inherent flaws in building operation or design that become evident over time due to load growth or new operating procedures. Many times energy savings can be found though proper adjustment and verification of proper system operation.
The culmination of commissioning and retro-commissioning is the confirmation of the development of proper operational, emergency and maintenance procedures, verification of operations and maintenance manuals, as well as the optimization of facility operation while allowing and ensuring for the training and evaluation of facility personnel.