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Application of the Commissioning Process to New HVAC&R Systems
The Commissioning Process (Cx) is a quality-oriented process for verifying and documenting that the performance of facilities, systems, and assemblies meets defined objectives and criteria. The Cx Provider Team uses a variety of methods and tools to verify that a project is achieving the Owner's Project Requirements (OPR) throughout the delivery of the project.
ASHRAE Guideline 1.1 provides specific guidance on applying Cx to new HVAC&R systems in buildings and facilities. Cx begins at project inception (during the Predesign Phase) and continues for the life of a facility (through the Occupancy and Operations Phase). Cx includes specific tasks to be conducted during each phase to verify that design, construction, and training meet the OPR. Guideline 1.1 describes the specific tasks necessary to successfully implement Cx for new HVAC&R systems and assemblies.
The 2025 edition of Guideline 1.1 comprises a comprehensive revision of the 2007 edition and includes access to the full collection of online informative common annexes. Common annexes include examples, samples, forms, and other material generally applicable to Cx across multiple applications. This information represents consensus good practice but does not contain mandatory commissioning process provisions.
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