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" "10041" "2011-05-09" "New Construction, Schools - New Construction, Commercial Interiors, Core and Shell" "Is it acceptable for LEED NC 2.2 EAc5 M&V Plans to follow the concepts of the IPMVP but limit the savings analysis in an effort to control costs, if they provide ongoing accountability and meet or exceed owners\' M&V objectives?" "Meeting the owner\'s requirements and providing ongoing accountability of energy consumption alone do not satisfy the credit requirements. The M&V plan provided must be consistent with either Option B or Option D of IPMVP regardless of cost of implementation. Applicable internationally." "None" "None" "X" "LEED Interpretation" "1549" "2006-08-09" "New Construction, Core and Shell" "Our question pertains to is a mixed use residential - commercial highrise; 15 stories, 159,646 GSF total; 147,364 GSF housing, 46,994 GSF parking below grade; 4,204 GSF retail at the ground floor. Our M&V plan was developed in accordance with the IPMVP Option D. Energy savings calculations are to be validated by calibrating the original energy simulation model developed for projecting savings during design of the project. This calibration will be accomplished by using information from the following sources:  Permanently installed metering: monthly gas and electric utility billing data and key submetered gas and electric end-uses. This will enable accounting of domestic hot water energy, heating energy, cooling energy consumption, and on-site energy production.  Baseline measurements on public area electrical lighting loads that will be effected by lighting control strategies to verify baseline energy loads.  Periodic temporary metering: periodic metering using data loggers to confirm actual electrical energy consumption by lighting in public areas effected by lighting control strategies.  Sampling of residential lighting using a strategy based on the California HERS sampling strategy. In the preparation of the M&V plan we have concentrated our effort on the specification of sufficient data to provide adequate tools for the future verification energy modeler. The engineering calculations, operational estimates, utility meter-billing analysis, statistical sampling methods, metering and monitoring techniques outlined in this plan are commonly used sources of information used to perform the analysis prescribed by the Option D protocol, demonstrating compliance with the credit requirements. Please confirm that the plan as described plan satisfies the intent of EAc5. Thank you." "Your M&V approach is acceptable for EAc5. The protocol described aligns with the intent and requirements of the credit. Make sure to submit a complete M&V plan in the LEED certification submittal. Applicable Internationally." "None" "None" "X" "LEED Interpretation" "1564" "2007-03-28" "Core and Shell" "EAc5.2: Requirement: Include a centrally monitored electronic metering network in the base building design that is capable of being expanded to accommodate the future tenant sub-metering as required by LEED for Commercial Interiors Rating System Credit EA3. Also develop a tenant M&V plan that documents and advises future tenants of this opportunity and the means of their achievement. Intent: Provide for ongoing accountability of building electricity consumption performance over time. THE APPROACH: For EAc5.2: LEED Core & Shell credit EAc5.2 references LEED CI EAc3, for which we will account for both Case A & Case B situations (but only providing for the capability of electrical energy monitoring). This project will have the capability & physical space needed to sub-meter the majority of tenant electrical usage. The tenant will have the ability to expand their metering so that their electrical use for lights, vav\'s, piu\'s, and receptacles can be monitored. However, the monitoring of the electricity to run the RTUs for space heating and cooling will be handled differently as there is no way to directly account for each individual tenant\'s electrical consumption for this heating and cooling. Each floor has its own RTU, which can be supplied with its own meter, allowing for monitoring of electrical use for each floor of tenants. Therefore, to obtain the amount of electricity consumed by each tenant for HVAC use, the total electricity recorded for each floor would be multiplied by the percentage of square footage occupied per tenant. The electricity required to operate common spaces, such as the lobbies, bathrooms, and elevators, will also be metered individually. A percentage of that electrical use will be applied to each tenant\'s electrical consumption as well based upon occupied square footage within the building. The manufacturer of the HVAC equipment (Trane) will be able to tie into all the meters and monitor/tabulate all electrical use within the building through their system\'s program. REQUIRED CLARIFICATION: In reference to EAc5.2: 1. Please verify that the explanation given in the previous section fulfills the credit requirements for the specified credit. 2. The locations within the building plan that need to be designated for tenant sub-metering equipment are only for electrical meters, which can track the electrical energy needed to run the services called out in Case B of EAc3 of LEED-CI. This credit calls for including a centrally monitored electronic metering network that is capable of being expanded to accommodate the future tenant sub-metering of electricity consumption ONLY. 3. Please verify that EAc5.2 is not dependent upon EAc5.1. In other words, EAc5.2 is not a ""point in addition"" to EAc5.1, such as is the case with WEc3.2 and WEc3.1. 4. Please verify that the M&V plan for EAc5.2 can be consistent with either Option B, C or D of the 2001 IPMVP Volume 1: Concepts and Options for Determining Energy and Water Savings. 5. Please verify that EAc5.2 calls for the development of a tenant M&V plan, and any calculations or modeling that needs to be performed will be completed by the tenant and is not required for this credit." "In response to submitted questions: 1. The system described appears to meet the intent of the credit and will be awarded if all actions are fulfilled and the credit is adequately documented. 2. The metering systems installed under this credit should be considered a subset of the more comprehensive M&V requirements of CI EAc3 (which addresses all energy sources and major end uses). 3. EAc5.1 and EAc5.2 are independent of each other. Having said this, the metering systems required by EAc5.2 are a relatively simple extension of the EAc5.1 systems should EAc5.1 be pursued. 4. As with the physical metering systems, the M&V plan associated with this credit should be considered a subset of the more comprehensive M&V plan associated with CI EAc3. 5. This credit requires only development of the M&V plan, not implementation of the M&V program. ************************************************************ Additional clarification from EA TAG re: CS EAc5.1 and EAc5.2: EAc5.1: Delete first bullet point of Requirements. Replace second bullet point of Requirements with the following: ""Develop and implement a Measurement & Verification (M&V) Plan consistent with Option D: Calibrated Simulation (Savings Estimation Method 2), or Option B: Energy Conservation Measure Isolation, as specified by the International Performance Measurement & Verification Protocol (IPMVP) Volume III: Concepts and Options for Determining Energy Savings in New Construction, April, 2003. The documentation is to include 1) a description of the metering infrastructure design, 2) existing meter locations, 3) existing meter specifications, 4) 1-line electrical schematics identifying end-use circuits, 5) guidelines for carrying out tenant sub-metering. EAc5.1 and EAc5.2: These credits reference IPMVP Vol. III, while LEED CI references IPMVP Vol. I. However, using Vol. III methodologies for these credits fully meets the intent of CI EAc3. Applicable Internationally." "None" "None" "X" "LEED Interpretation" "2097" "2008-05-27" "New Construction, Schools - New Construction, Core and Shell" "Our team wishes to submit an alternate approach to EAc5 consistent with the intent to ""provide for the ongoing accountability and optimization of building energy and water consumption performance over time."" We\'d like to use the PACRAT (Performance Assessment and Continuous Recommissioning Analysis Tool) automated Fault Detection and Diagnostic (FDD) program to provide ongoing M&V analysis. PACRAT utilizes recorded system operational data to improve facility operations and planning by: 1) Diagnosing system problems and poor performance and identifying energy wastes; 2) Documenting important system operational parameters such as loads, energy use, indoor air quality, etc.; 3) Setting a new standard for Monitoring and Verification of energy uses; and 4) Summarizing and formatting the data for effective visualization. PACRAT integrates enterprise data from many different controls, monitoring and metering systems. The system fully puts to use the volumes of data that can be obtained from building control systems, meters and data loggers, which generally gets ignored and lost. Benefits include: Actionable Results: PACRAT provides detailed, quantifiable, and actionable results of suboptimal and problem building and system performance. Output exceeds EAc5 goals by identifying the systems that are not functioning as expected and telling specifically how to correct it. With Option D modeling approach, the expense of developing, calibrating, and repeatedly running these models provides little lasting operational value to the performance of the building. Discrepancies in actual vs. modeled performance typically require extensive field investigation and trend data analysis to determine the cause(s) of the off-baseline performance. Persistence: Once configured, PACRAT provides regular (quarterly) output of system anomalies and performance results. Reviews of projects awarded EAc5 using the Option D approach indicates that the \'calibration\' exercise is often not performed. When it is performed, the nature of the procedure is to vary the input parameters of the building model until they come close to matching actual performance, often with only a cursory analysis of building systems to identify any inefficiencies. Makes Use of All Systems Data: PACRAT exceeds the \'Option D\' approach by using virtually all input/output data for each system under analysis (including individual sensors, valve and damper outputs, setpoints, etc.). In this way, it can perhaps be viewed as a pervasive \'Option B\' approach, where most of the parameters of each system are analyzed down to the individual control loop level. Analysis extends down to the individual systems level and includes air handling units, chillers, and hydronic pumping systems. Automated: Truly automated FDD methods remove the need for human beings to be contracted and engaged to provide analysis. The computational engine replaces the need for people to interpret results and is more efficient and can provide for more cost-efficient analysis. Web-Based: PACRAT is a web-based, electronic process from start to finish. Data is trended by the building automation system and is transmitted to the computational engine for analysis. Results are provided in a database format for the user to access via the Internet. The database format provides results that are filterable and searchable. Action taken by the Owner can also be entered onto the database for future reference. This project will include the electrical submetering points required by Credit 5, and will also include thermal (Btu) metering of chilled and hot water loads. Additionally, PACRAT will use approximately 400 system input/output points, including temperatures, humidity, pressures, status, damper commands, valve commands, and most setpoints perform the fault detection and diagnostics results and performance graphs. We propose an alternative compliance path requiring continuous metering equipment for those end-uses currently required by EAc5, as well as an automated FDD tool with quarterly reporting. This strategy will provide much more valuable feedback to the building operator and allow for ongoing accountability and optimization of building energy and water consumption performance over time. We are confident this will result in a more efficiently operated building with the highest level of accountability for systems performance." "Based on the description of the proposed alternative compliance path for EAc5, it does not appear that the PACRAT and FFD systems by themselves would meet the requirements of the credit. While the described software and technology appear to provide sophisticated capabilities to capture, trend and analyze energy related data, the data must be reconciled to the energy and water performance projections generated under EAp2/c1 and WEcx as per the the requirements of EAc5 and pertinent sections of IPMVP Vol 1, 2001." "None" "None" "LEED Interpretation" "2182" "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"