Entry Type ID Date Applicable Rating System Primary Credit Inquiry (LIs) Ruling (LIs) Related Addenda/LIs Related Resources Campus Applicable Internationally Applicable Country Applicability Reference Guide (Addenda) Page (Addenda) Location (Addenda) Description of Change (Addenda) "LEED Interpretation" "10042" "2011-05-09" "New Construction, Commercial Interiors, Core and Shell, Schools - New Construction" "Can an individual who has not been a CxA in the past, but has extensive experience with all aspects of the commissioning process, serve as the CxA for a LEED project?" "To meet the requirements of EAp1, the individual serving as the CxA must have commissioning experience at a similar managerial level on a minimum of two projects of comparable complexity. While this experience is typically confirmed based on previous experience as the CxA, it can be achieved based on similar experience. Applicable internationally." "None" "None" "X" "LEED Interpretation" "10068" "2005-08-26" "Commercial Interiors" "We are pursuing LEED-CI certification on a project involving the remodel of an existing building for use in manufacturing. The existing building is not LEED certified. The new tenant will occupy 100% of the building. The scope of renovation involves the following building systems: 1. Modifications to the HVAC distribution ductwork to serve new and existing VAV boxes to accommodate the new floor plan. The existing roof-top HVAC units are to remain and be reused. 2. Modifications to the heating water distribution system to accommodate VAV box modifications. The existing steam boiler, heat exchanger and circulation pumps are to remain and be reused. 3. HVAC controls are to remain, with minor adjustments to accommodate the system modifications. 4. Addition of exhaust fans for new restrooms. Existing fans serving locker/restrooms are to remain and be reused. 5. Addition of a kitchen exhaust hood in the facility test kitchen. 6. Replacement of the domestic water heater with a new heater. The existing circulation pump will remain and be reused. 7. Addition of new lighting controls, including day lighting. We have appointed a Commissioning Authority (a member of the MEP design firm who has not been involved in the design effort) for the Fundamental Commissioning portion of the project. Our interpretation of LEED-CI prerequisite EA 1 is that all equipment associated with the tenant scope must be commissioned. Therefore the existing equipment to remain is not within the commissioning scope. We intend to perform a retro-commissioning of the existing equipment being reused. Is our interpretation of the scope of fundamental commissioning correct? Would the retro-commissioning of the existing systems qualify the project for an innovation and design process credit, provided that it meets the fundamental commissioning criteria? It does not seem to fall under Enhanced Commissioning credit EA 2. This retro-commissioning would greatly enhance the reliability, efficiency and performance of the building. Would it be acceptable that the Commissioning Authority for the fundamental commissioning also be the CA for the retro-commissioning, since this person had no part in the design of the original systems?" "The objective of the prerequisite for fundamental commissioning is to establish the minimum commissioning activities on the minimum group of systems. As stated in the LEED-CI v2.0 First Edition Reference Guide under Scope of Work, ""Commissioning should be based on the owner\'s project requirements. At a minimum, to meet the requirements of this [EAp1] prerequisite, the commissioning process activities must cover all energy-related systems within the project scope."" While this approach establishes a minimum scope, it does not set an upper limit. The systems listed by the project team satisfy the minimum list to be covered by the prerequisite. Conducting the prerequisite commissioning activities on the additional existing systems found within the balance of the building does not warrant an Innovation in Design credit. Applicable Internationally." "None" "None" "X" "LEED Interpretation" "2174" "2008-05-28" "New Construction, Schools - New Construction, Commercial Interiors, Core and Shell" "See below for treatment of District Thermal Energy systems in LEED-NCv2.2, LEED-CSv2.0, and LEED-CIv2.0." "USGBC has developed a document that clarifies how district or campus heating or cooling systems are to be treated in all Energy and Atmosphere prerequisites and credits for LEED-NC, LEED-CS, and SSc1, Options K & L under LEED-CI. That document is available for download from the LEED Reference Documents page, here: https://www.usgbc.org/ShowFile.aspx?DocumentID=4176. All LEED-NC, LEED-CS, and LEED-CI projects involving district or campus heating or cooling systems that registered for LEED after this posting date must follow that guidance, and such projects that registered before this date may optionally follow that guidance." "None" "None" "LEED Interpretation" "2227" "2008-09-18" "Commercial Interiors" "We are a project that is moving into an existing building, which has previously been fully fitted out set as a set of offices. The building has an existing central core with toilets and kitchen spaces that are maintained by the landlord. We are leasing a set of offices on the third floor and are undertaking a renovation of this space in order to suit our requirements. The building is naturally ventilated and there is an existing hard ceiling in place complete with light fittings and fire systems which we intend on retaining as per the existing layouts. We are installing no domestic hot water systems as part of our works or renewable energy systems. In fact we are not planning on installing or making any changes to any MEP system, with the exception of some changes to data cabling. As such we are undertaking no works in the scope of our project that require commissioning as defined by EA prerequisite 1 - Fundamental Commissioning. We would therefore like confirmation that because we are not undertaking any works that are requiring commissioning in the scope of our project that we still meet this prerequisite. We could make changes to the lighting system in the space to enable us to undertake works that require commissioning thereby enabling us to meet the prerequisite. However this would require us to remove and throw away perfectly good existing light fittings and we do not believe that this is a sustainable solution, particularly when it would only be done to meet this prerequisite." "The applicant is requesting that the fundamental commissioning requirements be waived for projects which do not wish to modify any of the existing systems for which commissioning is required. This approach is not acceptable. The intent of the prerequisite is to verify that the project\'s energy-related systems are installed, calibrated, and perform as intended. At a minimum, a Commissioning Authority should verify that all of the required systems are calibrated correctly and satisfy the owner\'s project requirements (OPR). Applicable Internationally. " "None" "None" "X" "LEED Interpretation" "2389" "2009-01-23" "New Construction, Commercial Interiors, Core and Shell, Schools - New Construction" "Our client is a non-profit trade association which has leased space in a commercial office building in Washington, DC for 35 years. As part of an additional 10-year lease renewal and expansion, their interior space has been undergoing renovation. Upgrades to 124,000 of the 141, 000 square feet that the tenant occupies were completed in 2006 using a green approach. 10,000 square feet is currently being constructed, and 7,000 square feet is currently in design. The tenant occupies approximately 55% of the building in which they are located. Since the renovation began, the association has come to recognize LEED as an important performance benchmark of green building quality. The association is pursuing certification for its space in order to demonstrate the value of LEED CI certification to its employees and to educate its approximately 8000 corporate member organizations nationwide about LEED. The association\'s hope is to certify all 141,000 square feet of the space that they occupy. The association could limit the LEED CI site boundary to the 10,000 square feet that is currently under construction and the 7,000 square feet in which construction has not yet begun, and meet all LEED CI prerequisites and sufficient credit points to certify that portion of their space at a Silver or Gold level. They are interested, however, to undergo the additional effort and expense associated with including the 124,000 square feet of space that was renovated in earlier phase of renovation. We have confirmed that sufficient credit points could be documented for the whole space to be eligible for certification, however, the issue of how the EAp1 Fundamental Building Systems Commissioning prerequisite would need to be addressed. Alternatively we considered working with the association to pursue LEED OM for their entire space, however, LEED OM presents its own set of challenging issues given its current whole building approach and the fact that the association does not have direct control over the base building components or the activities of other building tenants. In order to include the previous phase of interior renovation in the LEED CI site boundary, we propose adapting LEED OM EAc1 requirements for commissioning the energy related systems in the tenant\'s scope whereby we would: 1. Develop a retro-commissioning, recommissioning or ongoing commissioning plan for the tenant\'s scope energy related systems, including the heating, ventilating, air conditioning and refrigeration (HVAC&R) systems and associated controls, lighting controls, including daylighting, domestic hot water systems, and renewable energy systems. 2. Conduct the investigation and analysis phase. Document the breakdown of energy use in the tenant space. 3. List the operating problems that affect occupants\' comfort and energy use, and develop potential operational changes that will solve them. 4. List the identified capital improvements that will provide cost-effective energy savings and document the cost-benefit analysis associated with each. Please let us know if this would be an acceptable alternate approach to meeting the LEED CI EAp1 Fundamental Commissioning prerequisite for the phases of the renovation already completed. The current and future phases of the project would follow the standard LEED CI EAp1 requirements." "The applicant is requesting approval for commissioning of spaces that have both begun construction and have completed the construction phase. Commissioning for portions of the building that have begun construction (i.e., 10,000 square feet) are eligible to achieve certification for EAp1 per a LEED-NC v2.2 CIR dated 9/18/2007 and a LEED-NC v2.1 CIR dated 2/5/2004. Projects that have already been completed, however, are ineligible to achieve LEED certification because the fundamental commissioning requirements in EAp1 were not addressed during the project design or construction phase. For portions of the building that have not been installed, the project team should develop Owners Project Requirements (OPR) and Basis of Design (BOD) documents as outlined in the LEED-CI v2.0 Reference Guide. Refer the CIR dated 9/18/2007 for additional information. All of the additional commissioning requirements outlined in the LEED-CI v2.0 Reference Guide must be satisfied. For portions of the building for which construction has been partially completed, the CxA must review not only the construction/installation of the commissioned systems but also whether the systems satisfy the design intent. Refer to the CIR dated 2/5/2004 for additional information regarding commissioning of partially installed systems and commissioning requirements. While the project team should be commended for the sustainable design practices implemented for portions of the building that have completed construction, these spaces are not eligible to achieve certification for LEED-CI. As identified in the request above, the project team should consider certifying completed portions of the building using LEED-EB. The owner may be able to convince the building association and/or other tenants to consider certifying the entire building using LEED-EB. Applicable Internationally." "2401" "None" "X" "LEED Interpretation" "2424" "2009-02-09" "New Construction, Commercial Interiors, Core and Shell, Schools - New Construction" "The purpose of this credit interpretation request is to confirm that the qualifications of the person the Owner has selected to complete Fundamental Commissioning for the project are acceptable. The project is a 150,000 SF speculative office building, with the Owner serving as the General Contractor for construction.. The project will complete the Fundamental Commissioning requirements (EAp1) but will not pursue Enhanced Commissioning (EA 3). The Owner has selected an individual employed by an independent company (not employed by the Owner/ General Contractor\'s firm) to perform commissioning for the building. The requirements specified in EA p1 for the commissioning agent state that ""the CxA shall have documented commissioning authority experience in at least two projects"". The selected commissioning agent has not commissioned a LEED project before but has served on numerous existing building projects overseeing the replacement of major system. He has also worked with at least two new building projects, where he was responsible for oversight during the installations of building systems. His responsibilities included: - review of plans before initial construction - meetings with sub-contractors to clarify requirements - attending relevant construction meetings - site visits for start-up of all major mechanical components - reviewing initial start-ups and making recommendations to ensure systems were working as specified - reviewing final test results and reports and making recommendations to avoid foreseeable problems suggested by the reports - coordinating with contractors and building engineers to make all warranty and non-warrantee repairs. Documentation prepared for these projects is comprised of a report outlining: - design phase drawing comments for major building systems - results of site visits to confirm that suggested changes were included in construction to witness system start-ups - a chronicle of post-construction follow-up which included witnessing of building system training for building staff. Please confirm that this individual\'s project experience is sufficient to meet the requirements for him to serve as the commissioning agent for EAp1." "The applicant is requesting confirmation that the selected commissioning authority (CxA) satisfies the commissioning qualifications outlined in the LEED-CS v2.0 Reference Guide. The CIR states that the selected commissioning agent is independent of the project\'s design and construction management teams and has documented CxA experience on several projects. The selected CxA is not required to have commissioning experience specifically related to LEED projects and, therefore, appears to meet the qualifications outlined in the reference guide. However, sufficient documentation must demonstrate commissioning of the two non-LEED projects through issues, logs and/or Cx checklists for all energy systems. Please note that the favorable ruling of this CIR does not guarantee credit acceptance during a review. Applicable Internationally. " "None" "None" "X" "LEED Interpretation" "2633" "2009-07-10" "New Construction, Commercial Interiors, Core and Shell, Schools - New Construction" "We are requesting a CIR for a commercial tenant build out in an existing space. The owner decided to go forward with LEED certification after original design drawings were in place. An independent Cx Authority was brought on board after construction documents were issued but before construction commenced, and was in contact with all necessary trades. A commissioning plan was generated prior to commissioning activities. The CxA worked with the project team throughout the construction process and generated a full Cx report. This project utilized existing mechanical equipment which serves the existing spaces. All information regarding this is outlined in the BOD. The Commissioning Agent reviewed all documents and incorporated these guidelines in their plan and final report. The built systems have had a thorough and unbiased review not just of how they were built, but of how they were designed. All prerequisite requirements have been met with the exception of the specifications being included in the original contract documents. All trades cooperated and worked with the Cx. Keeping with the intent of this prerequisite, all systems were adequately commissioned. The CxA has verified that the project\'s energy-related systems are installed, calibrated, and perform as intended, and has verified that all of the required systems are calibrated correctly and satisfy the owner\'s project requirements (OPR) and BOD." "The project team is requesting that the project meets the requirements for Fundamental Commissioning despite the exclusion of commission specifications being included in the original contract documents. For alternate compliance, documentation should be provided showing that the commissioning specifications were later issued and that they will be enforced by the owner and accepted by the contractor as part of the scope of work than the request is approved. Applicable Internationally." "5049, 5277" "None" "X"