Holistic Commissioning is a comprehensive process that goes beyond the traditional industry model by not only addressing the interaction between the building’s mechanical, electrical, and plumbing systems, but also including the building’s exterior envelope (enclosure), sustainability goals, and unique project-specific requirements.
Holistic Commissioning provides the greatest benefit when started in predesign because it allows implementation of high performance strategies at their lowest possible cost and establishes the foundation for maintaining and improving performance for the life of the building. Implementing Holistic Commissioning at an existing facility also provides significant financial returns raising occupant satisfaction, improving operational efficiency, and environmental stewardship for both new and existing facilities. Holistic Commissioning provides the tools owners and their staff need to increase financial rate of return for the facility.
The differences between commissioning and Holistic Commissioning is the difference between a snap shot in time and a continuous evaluation of the facility’s performance for an extended period. The Holistic Commissioning process does not end with testing the buildings performance at the end of construction or modifications to the facility. Holistic Commissioning examines the performance of the building over extended periods of time identifying opportunities to save money, increase operational efficiency and reliability of building systems that lower operational costs and increase the owner’s bottom line.
Retro-commissioning is the application of the commissioning process to existing buildings, a process that seeks to improve how building equipment and systems function together. Retro-commissioning can often resolve problems that occurred during design or construction or address problems that have developed throughout the building’s life. Retro-commissioning improves a building’s operations and maintenance (O&M) procedures to enhance overall building performance.
Fundamental Commissioning | Enhanced Commissioning
Fundamental and Enhanced Commissioning are the commissioning processes for LEED Certification. Fundamental Commissioning is a prerequisite required under the LEED Rating Systems and is construction phase only, addressing MEP systems, lighting controls, and alternative energy systems. Enhanced Commissioning includes design phase, construction phase, and warranty phase, and includes O&M training as well as the delivery of a Systems Manual.
Building Enclosure Commissioning (BECx)
The building enclosure is a key component of healthy high-performing buildings as its design determines ability to keep the weather out; introduction of sufficient quantities of daylight to offset the need for artificial lighting; sizing of heating, ventilation, and air conditioning systems, and the total cost of operation. In addition to the building enclosure assemblies (roof, fenestration, exterior above grade and subterranean wall assemblies) building enclosure commissioning includes interaction between the building envelope and HVAC (heating, ventilation, and air conditioning) systems.
Monitoring Based Commissioning (MBCx)
Utilizing information technology to collect and analyze building performance data, CxGBS’s ongoing monitoring based commissioning is one of the most important phases of the commissioning process. It provides the data necessary for tracking facility performance by identifying the factors that impact costs, building performance and occupant satisfaction. Ongoing monitoring based commissioning can quickly pinpoint systems’ and components’ performance degradation. Doing so facilitates reliability centered maintenance and improves O&M staff efficiency by quickly providing diagnostic analysis in real time, which can significantly reduce troubleshooting efforts.