In our last blog, we noted gaps in compliance with building commissioning (Cx) requirements, both for CALGreen and Energy Code, and we reviewed the Cx requirements as part of the building permit process. In this issue, we’ll provide an update on the construction phase requirements.
Although the foundational documentation for commissioning is completed prior to breaking ground, the critical performance work is completed during construction, start-up, and training. Interestingly, a study cited by the U.S. Department of Energy1 found that energy savings was not the key driver for commissioning of new construction projects. The study showed that owners more frequently cited “improvements to system design, thermal comfort, ease of maintenance improvements, and facility staff training and education” as their motivation for a complete commissioning process. Follow-through during construction makes all the difference!
Construction Phase Cx Components
- Installation verification and functional performance testing: During construction, the commissioning agent verifies that systems and components are installed correctly and according to the design specifications. This includes inspecting equipment, reviewing submittals, and conducting functional performance tests.
- Documentation and training: Thorough documentation of the commissioning process is essential. This includes test results, inspection reports, and as-built drawings. Additionally, building operators and maintenance personnel should be trained in the proper operation and maintenance of the commissioned systems.
- Commissioning report: A report of commissioning process activities undertaken through the design and construction phases of the building project shall be completed and provided to the owner or representative.
- Testing and adjusting for new buildings less than 10,000 square feet: For smaller projects, develop a written plan of procedures for testing and adjusting systems, then proceed with that plan including HVAC balancing and developing an O&M Manual.
Construction phase commissioning identifies all kinds of impactful deficiencies! A few recent local examples include: photovoltaic array not correctly programmed to return energy savings to the owner; irrigation controls incorrectly set, risking loss of landscaping; cooling unit not producing programmed temperature due to faulty refrigerant levels set at the factory; a fan installed facing the wrong direction.
Compliance and Enforcement
From a building compliance and enforcement perspective, the authority having jurisdiction (AHJ) should first identify that the project requires commissioning and to what extent per code. To ensure usefulness and compliance, the plan’s examiners need to confirm that the required design documents (OPR, BOD, Cx Plan, and Design Review) are completed and included before signing off for a permit. While the AHJ is not responsible for confirming that commissioning activities are underway during construction, it should, prior to issuing a certificate of occupancy, verify that the full scope of construction-phase commissioning has been completed. This includes reviewing the Commissioning report to ensure functional testing was performed and that the owner has provided final approval.
Conclusion
The Cx requirements included in California’s Title 24 Part 6 and Part 11 emphasize the critical role of commissioning in achieving energy-efficient and high-performance buildings. By following the commissioning process and meeting the documentation requirements, building owners and operators can ensure their buildings operate optimally, reduce energy consumption, and contribute to the state’s environmental goals.
For more information and in-person trainings, please check out our events calendar at 3c-ren.org/calendar-of-events-and-trainings
The on-demand webinar page is at 3c-ren.org/on-demand-trainings
And feel free to reach out to the Code Coach Hotline for more information or to have your Energy Code or CALGreen questions answered! 3c-ren.org/energy-code-coach
