Commissioning (Cx) is the process of verifying that a building’s systems operate as intended. This includes ensuring the final design and functionality match the owner’s requirements. Commissioned systems might include the following:
lighting and daylighting
domestic hot water
building envelope (BECx)
It can be done on new buildings or on existing buildings, in a process sometimes called retrocommissioning.
Commissioning is likely to yield 5%–10% improvements in energy efficiency by catching mistakes like missing or incorrectly installed equipment. It also helps avoid:
Retrocommissioning or RCx can be a valuable tool for commercial building owners. RCx addresses the same scope as new building commissioning but is performed on existing buildings. RCx can improve building performance, save energy and money-especially for large buildings.
Between lighting, water use, mechanical systems, the building envelope, and occupant health, existing buildings are rife with cost-effective retrofits and operational opportunities that also offer environmental benefits. Improvements range from the painfully obvious to the more complex and involved.
Tracking the performance of a building's mechanical and electrical systems is essential for energy savings that persist over time. In this article, EBN explores measurement and verification and explains why demand for these systems is growing. We also explain the LEED® Rating System's evolving treatment of M&V.