Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
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title: Total Building Commissioning
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### The Contractor and each subcontractor whose work is within the commissioning scope shall support the commissioning process, including completing pre-functional checklists, demonstrating system readiness, and participating in functional performance testing.
−### The terms "commissioning authority," "commissioning agent," and "commissioning provider" are used interchangeably across the referenced standards. This Standard uses "commissioning authority (CxA)" exclusively; any of these terms appearing in other Contract Documents shall be read to mean the CxA as defined here. {note}
+### The terms "commissioning authority," "commissioning agent," and "commissioning provider" are used interchangeably across the referenced standards. This Standard uses "commissioning authority (CxA)" exclusively; any of these terms appearing in other Contract Documents shall be read to mean the CxA as defined here.
## Commissioning scope tier
−### The commissioning scope tier establishes which systems are commissioned and to what depth. Fundamental commissioning is the energy-code minimum; LEED Enhanced and Total Building extend the scope to additional systems and add design-phase and post-occupancy obligations. Select the tier that satisfies the applicable code and certification requirements; when in doubt, the more comprehensive tier governs. {note}
+### The commissioning scope tier establishes which systems are commissioned and to what depth. Fundamental commissioning is the energy-code minimum; LEED Enhanced and Total Building extend the scope to additional systems and add design-phase and post-occupancy obligations. Select the tier that satisfies the applicable code and certification requirements; when in doubt, the more comprehensive tier governs.
```datasheet
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### The CxA's independence and credentials are the foundation of a credible commissioning process. An agent who reports to the party whose work is being verified cannot be a neutral advocate for the Owner. The required independence level scales with project size and certification scope. {note}
−### The CxA shall hold a current commissioning credential from a recognized certifying body. The specification shall list acceptable credentials rather than naming a single body, to preserve competitive bidding. {note}
+### The CxA shall hold a current commissioning credential from a recognized certifying body. The specification shall list acceptable credentials rather than naming a single body, to preserve competitive bidding.
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### For LEED Enhanced commissioning, and for projects with new HVAC systems in buildings exceeding 50,000 ft², the CxA shall be independent of the design and construction teams in accordance with ASHRAE 90.1 Section 8.7. {note}
−### The CxA shall have demonstrated experience commissioning systems of the type and complexity included in this project's scope. {note}
+### The CxA shall have demonstrated experience commissioning systems of the type and complexity included in this project's scope.
−### Where building enclosure commissioning is included, the CxA shall demonstrate enclosure commissioning experience or engage a qualified BECx subconsultant. Not all commissioning firms have enclosure capability; this is a common scope gap. {note}
+### Where building enclosure commissioning is included, the CxA shall demonstrate enclosure commissioning experience or engage a qualified BECx subconsultant. Not all commissioning firms have enclosure capability; this is a common scope gap.
## CxA engagement timing
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−## All commissioning documentation shall be delivered to the Owner in an editable, non-proprietary format in addition to any platform-native format, so that the record remains accessible after the platform subscription ends. {note}
+## All commissioning documentation shall be delivered to the Owner in an editable, non-proprietary format in addition to any platform-native format, so that the record remains accessible after the platform subscription ends.
# Installation Verification {toc}
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### The Contractor shall complete manufacturer-directed startup for each system and submit the startup report before functional performance testing begins.
−### TAB completion is a prerequisite input to HVAC functional testing, not a substitute for it. A specification stating that TAB constitutes commissioning is non-compliant and will fail energy-code review. The certified TAB report shall be received and accepted before HVAC functional testing begins. {note}
+### TAB completion is a prerequisite input to HVAC functional testing, not a substitute for it. A specification stating that TAB constitutes commissioning is non-compliant and will fail energy-code review. The certified TAB report shall be received and accepted before HVAC functional testing begins.
−### Building automation point-to-point checkout by the controls contractor is a precondition for functional testing, not the commissioning test itself. The CxA shall verify the controls checkout is complete before functional testing of automated systems begins. {note}
+### Building automation point-to-point checkout by the controls contractor is a precondition for functional testing, not the commissioning test itself. The CxA shall verify the controls checkout is complete before functional testing of automated systems begins.
# Testing {toc}
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−### For LEED Enhanced commissioning, the CxA shall directly witness or direct one hundred percent of functional performance testing. {note}
+### For LEED Enhanced commissioning, the CxA shall directly witness or direct one hundred percent of functional performance testing.
## Sampling strategy
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−### Where a sampled unit fails functional testing, the sample shall be expanded for that equipment category. The CxA shall define the expansion in the FPT script - for example, doubling the sample, and testing one hundred percent if the expanded sample also fails. {note}
+### Where a sampled unit fails functional testing, the sample shall be expanded for that equipment category. The CxA shall define the expansion in the FPT script - for example, doubling the sample, and testing one hundred percent if the expanded sample also fails.
### Non-repetitive equipment, equipment serving critical functions, and all equipment under LEED Enhanced commissioning shall be tested at one hundred percent. {note}
## Re-test responsibility
−### Where a system fails its first functional test because of a Contractor deficiency, the Contractor shall bear the cost of the CxA's labor to witness the re-test. Failing to assign re-test cost is a common source of dispute; assign it explicitly. {note}
+### Where a system fails its first functional test because of a Contractor deficiency, the Contractor shall bear the cost of the CxA's labor to witness the re-test. Failing to assign re-test cost is a common source of dispute; assign it explicitly.
## Integrated systems testing
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### Open deferred test items shall be listed in the final commissioning report with a scheduled completion date and a responsible party, and shall be tracked to closure on a posted deferred-test log. {note}
−### Where the Authority Having Jurisdiction does not require closure before occupancy, the certificate of occupancy may be issued with deferred tests open as a condition of occupancy; the Contractor's obligation to complete them shall survive substantial completion. {note}
+### Where the Authority Having Jurisdiction does not require closure before occupancy, the certificate of occupancy may be issued with deferred tests open as a condition of occupancy; the Contractor's obligation to complete them shall survive substantial completion.
# Building Enclosure Commissioning {toc}
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step: 0.05
setpoints:
+ - 0.15
- 0.25
− - 0.40
+ - 0.4
+ - 0.5
default: 0.40
```
−### The whole-building air leakage rate shall not exceed 0.40 cfm/ft² at 75 Pa for commercial buildings per the energy code. Healthcare and laboratory projects commonly specify a tighter limit of 0.25 cfm/ft²; the more stringent project-specific target governs where one is set. {note}
+### The whole-building air leakage rate shall not exceed 0.40 cfm/ft² at 75 Pa for commercial buildings per the energy code. Healthcare and laboratory projects commonly specify a tighter limit of 0.25 cfm/ft²; the more stringent project-specific target governs where one is set.
# Occupancy and Operations {toc}
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−### For LEED Enhanced commissioning, the CxA shall conduct a post-occupancy review no later than ten months after substantial completion, review trended operating data, conduct a review meeting with the Owner, and issue a resolution letter documenting outstanding items. {note}
+### For LEED Enhanced commissioning, the CxA shall conduct a post-occupancy review no later than ten months after substantial completion, review trended operating data, conduct a review meeting with the Owner, and issue a resolution letter documenting outstanding items.
## Ongoing commissioning
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−### Where ongoing commissioning is contracted, the CxA shall establish trends and monitoring points, review the trended data at defined intervals, and report deviations from the Owner's Project Requirements. {note}
+### Where ongoing commissioning is contracted, the CxA shall establish trends and monitoring points, review the trended data at defined intervals, and report deviations from the Owner's Project Requirements.
# Final Commissioning Report {toc}
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−## The final commissioning report shall be delivered within sixty days of substantial completion unless the commissioning plan establishes a shorter period; thirty days is preferred and ninety days is the outer industry limit. {note}
+## The final commissioning report shall be delivered within sixty days of substantial completion unless the commissioning plan establishes a shorter period; thirty days is preferred and ninety days is the outer industry limit.
# Existing-Building Commissioning {toc}
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## Defects identified during deferred, seasonal, or post-occupancy commissioning activities within the warranty period shall be corrected under the applicable system warranty at no additional cost to the Owner.