Existing building commissioning—analysis | U.S. Green Building Council
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LEED O+M: Existing Buildings | v4 - LEED v4

Existing building commissioning—analysis

Possible 2 points

Submittal Tips (click to expand)

EA Credit: Existing Building Commissioning – Analysis

All Options
  • Ensure that all energy-using and energy-producing systems have been accounted for.
  • Be sure to include the energy use breakdown associated with each major system and/or end use based on estimated or measured data. If using estimated data, use one of the following methods: 1) Submetering specific systems and equipment, using either permanently installed meters or temporary data collectors; 2) Engineering analysis, such as energy modeling or manual calculations.
  • The energy use breakdown for the building must include lighting, plug loads, heating, cooling, ventilation, and manufacturing process loads (as applicable). A breakdown of consumption by fuel type does not satisfy credit requirements.
Option 1. Commissioning
  • Remember that the analysis phase of the commissioning plan is separate from the ASHRAE Level 1 Audit required by EAp Energy Efficiency Best Management Practices, and that using the results from the ASHRAE Level 1 Audit do not meet the requirements of this credit for Option 1.
  • Ensure that a copy of the complete commissioning plan is provided.
  • Ensure that the provided commissioning plan includes all testing requirements listed in the Step-by-Step Guidance and Further Explanation sections of the LEED O+M v4 Reference Guide.
  • Remember that preventive maintenance and commissioning are two separate activities. Performing preventive maintenance on all equipment is a requirement of EAp Energy Efficiency Best Management Practices and does not meet the intent of this credit.
  • Ensure that the commissioning plan not only describes the commissioning process in general, but also includes the specific details required by the Credit Form. Refer to Steps 2 through 6 in the Step-by-Step Guidance section and the Existing Building Commissioning Plan section under Further Explanation for this credit in the LEED-O+M v4 Reference Guide for more information on what details are required.
  • Ensure that a table or similar documentation of the commissioning master list of findings, including any operating problems affecting either occupants' comfort or building energy use and proposed or potential operational changes that will solve these issues has been provided. The master list of findings differs from a list of proposed capital improvements.
  • Ensure that a list of all capital improvement measures identified is provided, and includes the simple payback period, the rate of return, or the cost-benefit ratio for each measure.
  • Be sure to include a commissioning summary report that includes all information listed on page 2 of the Credit Form.
Option 2. Energy Auditing
  • Be sure to include all required details for each identified practical capital improvement measure as described in ASHRAE’s Procedures for Commercial Building Energy Audits, Second Edition (2011).
  • Provide a list of capital improvement measures identified, but felt to be impractical, with reasons for rejecting the implementation of the measures.
  • Remember that ASHRAE's Procedures for Commercial Building Energy Audits, Second Edition (2011) requires that recommended measurement and verification methods be included for each proposed measure.
  • If the ASHRAE Level 2 audit was performed within the last five years, a new audit is not required to be performed during the performance period, but the audit report and findings must be updated.
  • All data center projects must complete the Air-Management Tool spreadsheet and Electrical Systems Tool spreadsheet from the DC Pro System Assessment Tools, in addition to the requirements stated in the LEED O+M v4 Reference Guide for the chosen compliance path.