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and not directly associated with any aspect of the design and/or installation of the project systems.
CxP eligible entities for projects with limited scope For prerequisite compliance, the CxP may be directly associated with design or installation of the commissioned systems if one of the ASHRAE 90.1, Section 4.2.5.2 exceptions apply:
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There are fewer than 10,000 square feet (930 square meters) of conditioned space with combined heating, cooling, and SWH equipment capacity totaling fewer than 960,000 Btu/h (280 kW).
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The project complies with ASHRAE 90.1, Section 6.3 Simplified Building Compliance Path for Systems.
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There are nonrefrigerated warehouses.
Verification and testing (V&T) providers ASHRAE Standard 90.1 also requires that the CxP include V&T providers. A V&T provider is an entity that completes the activities needed to implement the project functional performance testing (FPT) activities or verify that elements of the project meet stated requirements. In many cases, the entity acting as the CxP fulfills this requirement. Confirm that an individual, qualified in verification and FPT execution is part of the commissioning team.
CxP requirements for building envelope commissioning If the project scope includes the building envelope, the CxP must include qualified individuals who can perform the envelope design review and air barrier inspection or a V&T provider who can perform air leakage testing.
Timing for CxP engagement Identify a CxP no later than the end of the design development phase. The CxP has the primary responsibility of leading the design and construction team through all aspects of the commissioning.
Additional considerations A single entity can perform all system commissioning efforts, provided that the entity meets the minimum requirements outlined.
For projects that use different qualified individuals to perform various Cx tasks, ensure sufficient collaboration within the team to provide continuity from design through operations. For example, an entity may have different
U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 119