How energy-efficient is your project building compared with the national average for similar building types? If your project building is already performing well, you may only need to document that performance in order to meet the prerequisite. If your building is relatively inefficient, on the other hand, may have to make operational changes or capital investments to make some improvements. Project teams with underperforming buildings may start by performing an energy audit to identify areas of waste, and the best opportunities for improving efficiency. There are a number of federal and regional programs that offer rebates or other financial incentives for energy upgrades, so capital investments may see relatively fast paybacks.
Accessing the Energy Star Portfolio Manager website.
All project teams are required to use EPA’s Energy Star Portfolio Manager to track a minimum 12 months of data for all energy consumption. The data are then benchmarked based on source Energy Use Intensity (EUI) to show compliance. Source EUI incorporates efficiency factors into an analysis of the total amount of raw fuel (or “source energy”) used to operate the building, rather than using the more limited measure of site energy, which reflects the amount of utility heat and electricity consumed at the building. Most buildings will benchmark through Energy Star and document the prerequisite through Case 1. Those not eligible for an Energy Star rating will use summary data generated in Portfolio Manager in conjunction with protocols provided by USGBC to complete benchmarking calculations and document the prerequisite and credit through Case 2.
Thirteen building space types are eligible for Energy Star ratings. Typically, if at least 50% of the building’s gross floor areaGross floor area (based on ASHRAE definition) is the sum of the floor areas of the spaces within the building, including basements, mezzanine and intermediate‐floored tiers, and penthouses wi th headroom height of 7.5 ft (2.2 meters) or greater. Measurements m ust be taken from the exterior 39 faces of exterior walls OR from the centerline of walls separating buildings, OR (for LEED CI certifying spaces) from the centerline of walls separating spaces. Excludes non‐en closed (or non‐enclosable) roofed‐over areas such as exterior covered walkways, porches, terraces or steps, roof overhangs, and similar features. Excludes air shafts, pipe trenches, and chimneys. Excludes floor area dedicated to the parking and circulation of motor vehicles. ( Note that while excluded features may not be part of the gross floor area, and therefore technically not a part of the LEED project building, they may still be required to be a part of the overall LEED project and subject to MPRs, prerequisites, and credits.) (excluding parking lots and garages) is classified as one of the following space types, the project is eligible and must use Case 1:
To ensure national comparability, climate data is used to normalize energy consumption to compare the project building to similar buildings in similar climate zones, eliminating potential regional variations. However, it may be easier in certain regions to improve a building’s efficiency based on city or state policies. For example, savings achieved through energy-efficiency improvements may qualify your project for state and local utility incentive programs. Ask local utility providers about incentives and rebate programs.
The updated Case 2 calculator (see resources section) uses Labs21 to facilitate benchmarking for buildings with laboratory spaces. The calculator includes specific directions to walk you through the process.
Yes, international projects that are comprised of ratable space under Energy Star must still pursue the EAp2/EAc1 via Case 1.
Generally, it is not possible to benchmark multiple buildings as a single entity on Portfolio Manager for Case 1 or for Case 2. Each building must be separately benchmarked as a standalone entity according to either Case 1 or Case 2 depending on the space type associated with each building. USGBC’s Application Guide for Multiple Buildings and On-Campus Projects is a good resource to reference in this type of scenario.
The first step is to enter the building and associated space characteristics on Portfolio Manager to see if the building is eligible for an Energy Star rating. If it is, you go with Case 1 and if not, go to the Case 2 calculator. Energy Star has published additional guidance for mixed-use buildings that is a great resource in this circumstance.
In this case it is a good idea to (1) reach out to Energy Star directly to determine if the structures should be benchmarked as a single building or two and then (2) reference the LEED Supplemental Guidance to the Minimum Program Requirements. If it is still unclear after those two steps are taken, it’s also a good idea to communicate with USGBC directly to confirm the best approach.
In order to use an Energy Star label for the streamlined path, the Label must have been awarded within 12 months of the LEED application submittal date. For example, if you receive label award notification from Energy Star on March 5, 2012, you can use the score associated with the label as long as you submit your application to GBCIThe Green Building Certification Institute (GBCI) manages Leadership in Energy and Environmental Design (LEED) building certification and professional accreditation processes. It was established in 2008 with support from the U.S. Green Building Council (USGBC). on or before March 5, 2013.
Process loads generally may not be excluded from the building’s energy use for benchmarking purposes. However, depending on the appropriate compliance path, you may be able to normalize the energy use from process loads based on the relative activity level of the building operations. For example, if the building is a manufacturing facility, part of the benchmarking process will involve normalizing energy use based on the relative output of the facility. Use of CIRs in the case of special benchmarking for buildings with process loads is recommended.
For the LEED submission, provide a summary of submetered energy use for the project building along with the utility bills for the campus. Include a narrative summarizing the sub-metering approach and explaining the difference between the utility bills and the submetered energy use data included on Portfolio Manager, which commonly includes a spreadsheet showing the deductions from the total consumption used to show the energy attributable to the project, or how submeter readings for each separate entity add up to the whole reflected in the utility bills.
If you have a space that is submetered, is under separate management, and does not support the typical operations of the remaining portions of the building, this space may be excluded from the prerequisite.
When applicable variables change during the performance period, these changes must be recorded on Portfolio Manager to ensure accurate benchmarking of the building. When making updates to the space characteristics on Portfolio Manager, make sure to select “update” rather than “correct” and note the date when the updated space characteristic was first true. By selecting “update” the change in the building characteristic is only counted for the appropriate portion of the performance period rather than the whole thing. For example if 20% of the building space becomes vacant half way through the performance period, update the vacant space on Portfolio Manager so that the building was 100% occupied for half of the performance period and 80% occupied for the other half. In these circumstances, it is a good idea to provide a copy of the “Revision History” for affected spaces along with the prerequisite submittal.
For EAc6, the performance period should fall within 30 days of the latest performance period end date for all other credits and prerequisites. It should not follow the period of the Energy Star label associated with the streamlined path for EAp2.
The number of monitors in the building does not impact the number of computers entered into Portfolio Manager. The value for computers should reflect the total number of personal computers and servers in the office space. For example, if the office space includes 10 PCs, 5 laptops, and 25 monitors, the input for Portfolio Manager is 15 PCs.
For office buildings, if the vacant space is greater than 10% of the building area use the following guidance as indicated in the USGBC Reduced Occupancy Guidance document. For all other space types, no other changes are required for this credit.
Assess current performance and Energy Star eligibility. Benchmark current performance based on the option that applies to the project building. Make operational improvements or equipment upgrades to meet minimum energy performance requirements.
Benchmarking can typically be managed by in-house staff, reducing capital investment.
Review “15 O&M Best Practices for Energy-Efficient Buildings,” a helpful document published by Portland Energy Conservation, Inc. (PECI) to assist facility managers and building owners with basic energy-efficiency issues.
Provide building operators with access to BOMA’s BEEP (Building Energy Efficiency Program) training webinars to maintain regular and effective training for personnel responsible for daily building operations.
Collect energy metering data for a minimum period of the most recent twelve months.
Be sure that information is copied accurately from utility bills, including start and end dates of the statement period, and that you are using actual meter readings as opposed to estimated readings whenever possible. Replace estimated meter readings with actual meter readings once those statements are received. Exporting data inputs from Energy Star and graphing the utility data can help uncover data entry errors through visual comparison.
Energy Star requires precise data to describe the different space types in the building, including the square footage, number of occupants and computers, and other characteristics of daily operations. Careful inventory of these variables will result in a more accurate rating.
Energy metering data may be excluded for up to 10% of the building’s gross floor area if that space is sub-metered and used for an independent purpose unrelated to typical business operations, such as a cafeteria; or used as a computer data center.
LEED defers to Energy Star practices and standards to generate a Portfolio Manager rating or score. Where questions arise regarding this score, review Energy Star technical guidance documents and contact Energy Star customer service to facilitate the process.
If you initially get a low Energy Star score, start your process by identifying no- and low-cost operational changes to reduce energy consumption. If your building is an energy hog, it’s more likely that these opportunities will exist, and focusing on them to start with will help you go the distance. For instance, simply changing heating and cooling set points by one or two degrees and getting into the practice of turning off lights and office equipment when not in use will have dramatic effects on overall building energy use.
Building owners can reduce overall operating costs by optimizing energy performance; many operational energy-efficiency improvements will provide instant or short-term paybacks.
Pursuing commissioning through EAc2 will help identify energy-efficiency improvements, and will pay off particularly well in inefficient buildings.
Many state and federal agencies offer rebates or other financial incentives to companies that undertake energy-efficiency initiatives.
For building types covered by Energy Star but located outside the U.S., use Case 1. Portfolio Manager proivdes a list of non-U.S. locations, but it is not complete. If the location for an international project is not listed, consult ASHRAE 90.1-2007 Appendices B and B to determine a comparable U.S. city.
Continue entering monthly metering data into Portfolio Manager to update the building data.
Closely monitor energy consumption and correct any conditions contributing to energy waste.
Track any changes in occupancy or space uses, if any, to adjust Portfolio Manager inputs accordingly.
Expect no costs for in-house calculations or tracking and minimal costs when using a consultant to complete calculations using provided data.
Provide documentation of the Energy Star rating or certificate award from the EPA.
You must generate an Energy Star score if the building type is listed as an eligible space in Portfolio Manager. Case 2 is not allowed for buildings eligible for Energy Star.
Complete the EAp2/EAc1 Case 2 Calculator to demonstrate the building’s level of energy efficiency.
Use figures generated in Portfolio Manager to complete the EAp2/EAc1 Case 2 Calculator spreadsheet.
If the building type is listed in Portfolio Manager, but is not eligible for an Energy Star score, then you will most likely be able to use the Option 1 of the EAp2/EAc1 Case 2 Calculator. Complete the “Eligibility” Tab of the Option EAp2/EAc1 Case 2 Calculator to confirm which option you should use.
Provide one of the following data summaries:
If determining the Energy Baseline Including Historical Data, the three years of data must fall within six years of the beginning of the performance period.
If the project building type is not listed in Portfolio Manager, and more than 10% of the building space must be entered into Portfolio Manager as “other,” then you will most likely need to use the Option C calculator. Complete the “Eligibility” Tab of the EAp2/EAc1 Case 2 Calculator to confirm which option you should use.
Industry reports may provide useful benchmarking comparisons and eliminate the need for you to locate three comparable buildings on your own. The International Facility Management Association (IFMA) publishes benchmarking reports that are available on its website.
Excerpted from LEED 2009 for Existing Buildings: Operations & Maintenance
To establish the minimum level of operating energy efficiency performance relative to typical buildings of similar type to reduce environmental and economic impacts associated with excessive energy use.
For buildings eligible to receive an energy performance rating using the EPA’s ENERGY STAR® Portfolio Manager tool, achieve an energy performance rating of at least 69. If the building is eligible for an energy performance rating using Portfolio Manager, Option 1 must be used.
Have energy meters that measure all energy use throughout the performance period of all buildings to be certified. Each building’s energy performance must be based on actual metered energy consumption for the LEED project building(s). A full 12 months of continuous measured energy data is required.
Calibrate meters within the manufacturer’s recommended interval if the building owner, management organization or tenant owns the meter. Meters owned by third parties (e.g., utilities or governments) are exempt.
For buildings with a primary space type not eligible to receive an energy performance rating using Portfolio Manager, comply with 1 of the following:
Demonstrate energy efficiency performance that is better than 69% of similar buildings (69th percentile or better) by benchmarking against national source energySource energy is the total amount of raw fuel required to operate a building; it incorporates all transmission, delivery, and production losses for a complete assessment of a building's energy use. data provided in the Portfolio Manager tool as an alternative to energy performance ratings. Projects outside the U.S. may use a local benchmark based on source energy from their country's national or regional energy agency. Follow the detailed instructions in the LEED Reference Guide for Green Building Operations & Maintenance, 2009 Edition.
Demonstrate energy efficiency performance by determining an alternative rating score using the Portfolio Manager tool to report the building's energy use data from the performance period. Follow the detailed instructions in the LEED Reference Guide for Green Building Operations & Maintenance, 2009 Edition.
Enter energy use data during the performance period for at least 1 year into Portfolio Manager to determine the “weather-normalized source energy intensity”. Use this value in the offline calculator to determine the percent reduction from the streamlined baseline.
Enter at least 3 consecutive years of historical energy use data into Portfolio Manager in addition to the current year’s data to determine the “weather-normalized source energy intensity” for each year. Use these values in the offline calculator to determine a baseline using the historical energy use data of the project building.
In addition to the historical data used in Option 2b, provide energy use data for at least 3 other buildings with similar uses over at least a 2-year period to determine the “average energy performance of a similar building” in Portfolio Manager. Enter this data into the offline calculator.
Achieve energy efficiency performance better than the minimum requirements listed above; points are awarded according to the table below.
Have energy meters that measure all energy use throughout the performance period of all buildings to be certified. Each building’s energy performance must be based on actual metered energy consumption for both the LEED project and all comparable buildings used for the benchmark. A full 12 months of continuous measured energy data is required.
Use the Portfolio Manager tool available on the ENERGY STAR website to benchmark the project even if it is not eligible for an EPA rating: http://www.energystar.gov/benchmark.
You may use the LEED v4 version of this credit on v2009 projects. For more information check out this article.
This credit has an alternative compliance path available for the use of ISO 50001: Energy Management Systems. For more information see Pilot ACP 86: LEED 2009 EBOM ACPs for ISO 50001.
Existing building commissioning and energy audits will help identify areas of building operations that are not efficient. Implement energy-efficient retrofits and energy-saving techniques to reduce the building’s energy use. Energy-efficient equipment such as office equipment, maintenance equipment and appliances will aid in the reduction of energy waste. Employ the use of meters on major mechanical systems to effectively monitor the energy consumption of each.
In addition to efficiency improvements, consider renewable energy options as a way to minimize the building’s environmental impact.
EPA's system for helping you track and improve energy efficiency across your entire portfolio of buildings.
A helpful guide for use of Portfolio Manager to track energy utility data.
A helpful guide to assist facility managers with best practices for common energy-efficiency issues.
Required reference document for DES systems in LEED energy credits.
Portfolio Manager explains the eligibility requirements for tracking and benchmarking energy use over time in commercial and institutional buildings.
Calculator for LEED-EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems., optimizing energy efficiency performance.
IFMAInternational Facility Management Association is the largest international facilities managers' organization.
The Building Owners and Managers Association International (BOMA) has a program called BOMA Energy Efficiency Program (BEEP). BEEP
ENERGY STAR offers free online training to help you improve the energy performance of your organization.
ASHRAE publishes widely used standards and publishes the ASHRAE Journal.
Complete LEED Online documentation for achievement of EAp2 on a certified Gold LEED-EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems. 2009 project in Denver, Colorado.
This annotated sample of the LEED Online form demonstrates how to document EAp2 and EAc1.
Sample LEED Online forms for all rating systems and versions are available on the USGBC website.
I had recently checked the Energy Star Portfolio Manager website and it seems to be down. It has been a few days. Would anyone know if there's an alternate website or if and when the original site will be restored?
Hi Pablo, I got an email from Energy Star yesterday about upcoming Portfolio Manager maintenance:
"From October 3-12, 2016, EPA is implementing software upgrades to the Portfolio Manager database system. These upgrades are being made to ready the system for future improvements to system performance. They should be invisible to users, and we don’t expect any disruptions to services or performance. If, however, you do experience any problems, we ask that you please alert us by sending a message using the “Ask a Question” link at www.energystar.gov/buildingshelp"
I don't know if your issue is related to this, but maybe sending them a message will help you get an answer. I was also able to log in with no trouble today, so maybe you can now too.
Thank you Trista. Apparently I had encountered problems with the service provider. I tried accessing from different locations (with different internet providers) and I was able to connect.
We have the opportunity to push our utility data to ENERGY STAR from our utility company. There are now about a dozen utilities doing this in the USA. The ENERGY STAR score will be based on aggregate energy use for the building. If we set this up it will be fantastic for our client but I'm trying to anticipate any problems with LEED and EAp2, EAc1 or EAc6 reporting and documentation. We can still provide the utility bills. Wondering if anyone has had experience with this and do you know of any problems? Is aggregate data okay?
I had a call with GBCIThe Green Building Certification Institute (GBCI) manages Leadership in Energy and Environmental Design (LEED) building certification and professional accreditation processes. It was established in 2008 with support from the U.S. Green Building Council (USGBC)./USGBC today to discuss the Dynamic Plaque. They accept aggregated energy data so I believe my silly question is answered.
Our project receives water bills including water usage every 3 months. Is it acceptable to eneter meter readings and costs in EnergyStar Portfolio Manager tool for a period of 3 months instead of 1 month? Electricity and district heat consumption is monitored monthly so there's a problem only with water readings.
Hi Agata, it depends on what you're trying to accomplish. It's fine to use the bills if you just want to track water use and costs using Portfolio Manager (additionally, there's no water tracking requirement under EAp2 where you've posted this question). However, if you're trying to earn WEc1 you wont be able to use the bills because meter readings have to be taken at least weekly.
My building is a licensed hospital and we are trying to be certified in the category of LEED Existing Building O&M as Healthcare option is not available in LEED V.3. However, we found that selecting the building as Hospital (General Medical & Surgical) in the EnergyStar's Portfolio Manager is the most appropriate for my building. My question is can I do that or do I have to select my building in the Portfolio Manager as just a regular building?
In short: yes, you can! In fact, you should.
LEED expects (and requires) you to select the most accurate building type in ENERGY STAR Portfolio Manager that describes your building. If it's a hospital, then choose that in ENERGY STAR. If it's an office then choose office. It's definitely a mistake to "mis-label" your building in ENERGY STAR or LEED.
I'm trying to find a benchmark comparison report for manufacturing plants but have had no luck so far. We've done many energy projects on our plant but still have only managed to reduce our EUI by 13% from our historic value (2010-2012). I'm trying to achieve EAp2 by using option 2C since it can't be achieved with 2B or the streamlined approach since the EUI for All others - non classified is 213 which is too low for our type of facility.
Any help will be greatly appreciated.
We are having the exact same issue. What did you do? Can we please connect offline, to discuss this further? Please email me at: firstname.lastname@example.org
We are pursuing Option 2B: Energy Baseline including Historical Data for minimum energy efficiency, the weather normalized Energy Use Index from Energy Star Portfolio Manager during performance period is 141 kBtu / sq.ft against 173.5 kBtu/ sq.ft of baseline which derived from Historic data. However, when I feed these details into Case2 offline calculator it show the percentile level above national median is 28 and corresponding point is 6. subsequently, we realized that 213 kBtu / sq.ft has been taken as baseline for calculation.
Can we use this percentile to sought 6 points under EACr1 Optimize Energy Performance?
Or, we have to use the percentile above national median by considering the baseline derived from historic data?.
Hi Abdul, if the building doesn't qualify for Case 1 or Case 2 Option 1, then you do have to account for historic data under Case 2 Option 2B. But, I'm not clear about the inconsistency between the baseline EUI of 173.5 and 213. Were they both derived from historic data? Could you explain this in more detail?
We have uploaded energy consumption of 2013 to 2015 for baseline establishment in Energy Star Portfolio Manager. The weather normalized Energy Use Index of
2013 - 164 kBtu / sq. ft
2014 - 174.3 kBtu / sq. ft
2015 - 182.2 kBtu / sq. ft
An average, Energy Use Index of Baseline is 173.5 kBtu / sq. ft. Likewise, Energy Use Index during performance period is 141 kBtu / sq. ft. when I am feeding these details into case 2 calculator, it shows, Historic Average is 173.5 kBtu / sq. ft and Option 2B baseline is 213 kBtu / sq. ft. The percentile above national median is 28 and corresponding point is 6. It unveils that if Baseline Energy Use Index derived from Historic Data is less than 213 kBtu / sq. ft, the calculator would take 213 kBtu / sq. ft as Baseline and accordingly estimate the energy savings.
My question is "Is it right and Can we use this percentile in EACr1 Optimize Energy Performance and sought 6 points under this credit" since baseline from historic is different.
I'm not totally sure what is happening. But, is the 213 kBtu/sq.ft being derived from Option 2A in the calculator? Also, what type of building is it?
If the building doesn't comply via Option 2A, given the historic data that you have, the building wouldn't comply with Option 2B either. In that case, you would need to find three or more comparable buildings to pursue Option 2C.
What are the requirements to comply with this prerequisite if using historic data? How much (percentage) lower than the historic average must my current EUI be?
If the building is eligible for Case 2 Option 2, the current EUI must be 19 percentile points above the historic baseline. So, it's not a direct percentage lower. You can test out your situation using the Case 2 calculator here http://www.usgbc.org/resources/minimum-energy-performance-case-2-calcula...
Thank you Ben!
Hello. We will make the Eap2 by Energy Star. To do this we have invoices for the total consumption of the building (offices + CPD), and manual readings consumption of different meters. Is this enough to get the qualifying portfolio or need automated meter to take the differents readings?
The meters do not have to be automated in order to meet EAp2. So long as you have meters that monitor the entire consumption of the building, and those meters are calibrated or owned by the utility, you should be ok.
If you are thinking of pursuing EAc3.2 however, that credit requires that meters are readings are taken automatically. Manual readings do not work for that credit.
We have a client that would like to attempt to certify one building that is part of a college campus. This building is primarily instructional classrooms, some office space, and an auditorium. What is the space type that should be used to attempt to get an Energy rating? I have seen different approaches to this issue. Thanks
College/university instructional buildings are not eligible for an EnergyStar label or certification, although you can still benchmark them using Portfolio Manager to get an EnergyStar score. See https://portfoliomanager.zendesk.com/hc/en-us/articles/213426297-What-Pr... for more information. To demonstrate compliance with EAp2, you'll need to follow Case 2.
My question is what space type to use in the Case 2 once I get an EUI from Portfolio Manager. There is Other-Education but I am not sure if that is the correct choice.
In your case it sounds like "Other-Education" would indeed be the best choice if the building is mostly classrooms. However, if the auditorium is large and is used often then it might make sense to split it out into its own usage type in the LEED calculator to ensure your building does not get penalized for its normal operational practices.
Our client has asked us if the students can be considered as workers as there are a large number of students in the building during the day. They do not think that only including the workers in the building fairly represents the facility. They have a large number of student regularly using this facility. Thoughts?
Can you provide more context to your question? How will the workers fit into the Case 2 calculation?
We have a project that aims LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems. certification. The project is a school. We enter the data of energy consumption and water consumption in Portfolio Energy Star. This project in Colombia obtained 22.9 KBTU / ft² for Site EUI, this score it was compared with the average of similar buildings in Santafe Springs, LA in United States, which have a similiar weather to Bogotá, Colombia. The average value is 44.2 KBTU / ft² for EUI Site. Can I use this information to document the prerequisite 2:minimum energy performance?.
Thank you in advance for your help.
You can use Portfolio Manager internationally. As long as the building is one of the types which receive an Energy Star rating you should use the Energy Star score to document the prerequisite and credit.
Portfolio Manager normalizes for location internationally.
In our project 36 No of 25 Watts individual solar street light is available. We could not meter the energy consumption of each individual solar light because there is no common panel for all the lights. Kindly advice me how to document for energy star portfolio manager.
It depends on your situation. Here is a quote from ENERGY STAR's online help related to metering solar energy production:
"However, if your solar panels generate a nominal amount of electricity (i.e. less than 1 % of your total energy), you can exclude them from your property."
In other words, if your 36 solar street lights, taken together, produce less than 1% of your property's total energy in a year, you don't need to do anything. Simply document this fact for the LEED reviewer. If they are more than 1%, you must meter some of them until the unmetered total becomes less than 1%.
The building is catered by own chiller plant located in the building & building owned DES CogenerationThe simultaneous production of electric and thermal energy in on-site, distributed energy systems; typically, waste heat from the electricity generation process is recovered and used to heat, cool, or dehumidify building space. Neither generation of electricity without use of the byproduct heat, nor waste-heat recovery from processes other than electricity generation is included in the definition of cogeneration. plant for the space cooling. The electricity for the building is from building owned DES & third party electricity board.
if the whole building is catered by the Cogeneration plant. I can use DES allocation calculator & DES guidance. but in this project the the electricity is from third party & cogenration plant.
How I need to document the above case for LEED EB O&M 2009 EAP1?
First of all, I assume your question is about EAp2 (not EAp1 as your inquiry's text says).
Two forms of energy are relevant to your question: thermal energy (for space cooling) and electrical energy (general use). USGBC's published guidance for district/campus energy systems is mostly intended to establish requirements for allocating thermal energy, not electricity. Although electricity is important to consider in the cogenerationThe simultaneous production of electric and thermal energy in on-site, distributed energy systems; typically, waste heat from the electricity generation process is recovered and used to heat, cool, or dehumidify building space. Neither generation of electricity without use of the byproduct heat, nor waste-heat recovery from processes other than electricity generation is included in the definition of cogeneration. context, it is secondary to the thermal energy.
Thus, since your building's thermal energy is entirely "Building-Owned" as defined by USGBC, I recommend that you use the standard DES guidance and calculator. You should also clearly explain that the electricity is not solely from a "Building-Owned" source in case the LEED reviewer has questions about that.
As always, if you have significant doubts you should submit a formal CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide.
We are certifying a LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems. project composed of 28% laboratory and 72% office.
The Case 2, Option 1 Labs is asking to enter to parameters:
i.This Project Building's annual weather normalized Source EnergySource energy is the total amount of raw fuel required to operate a building; it incorporates all transmission, delivery, and production losses for a complete assessment of a building's energy use. Use Intensity from Portfolio Manager.
ii.Peer Facility Average (from your Labs21 Benchmark Statistics)
My questions are:
-Do we have to include the whole building energy consumption in the Portfolio Manager (laboratory+office) or just the office space?
-Do we have to include the whole building energy consumption in the Labs21 tool or just the laboratory?
Our concern is not to double count the energy consumed in the laboratory.
I believe the answer is yes, that you must include whole building consumption on Portfolio Manager and within the Labs21 tool. I believe that the Labs21 data set includes whole building usage and that part of generating an appropriate peer group within Labs21 depends on the portion of the building that is laboratory space.
Have you tried that an are getting an unexpected result?
Yes, the calculator says I will achieve 14 points.
I have just found out that Labs21 always classifies by buildings in the climate zoneOne of five climatically distinct areas, defined by long-term weather conditions which affect the heating and cooling loads in buildings. The zones were determined according to the 45-year average (1931-1975) of the annual heating and cooling degree-days (base 65 degrees Fahrenheit). An individual building was assigned to a climate zone according to the 45-year average annual degree-days for its National Oceanic and Atmospheric Administration (NOAA) Division. 5A, but my project is in zone 3A. I do not know how to change this parameter. Does anyone know?
LEED Online requests a copy of the complete Statement of Energy Performance (SEP).When generating the statement, it is noted to make sure to select the following report options: Statement of Energy Performance, data checklist and facility summary. However the "facility summary" is not part of the options available when generating a report in the Energy Star Portfolio Manager, What should be done? Is the data verification checklist enough since it contains all facility information (energy, footage, uses, etc.)?
Hi Charalampos, providing the SEP and Data Verification Checklist is enough.
We have a huge existing building which is internally divided into five separate buildings. Each building has its own owner. Can we get LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems. certificate for only one of these buildings? The owner of this building has the full responsibility of maintaining the site and exterior of all the five buildings.
Yes, in general this can be done as long as your project complies with LEED's rules for such situations, such as separate ownership, separate addresses, separate entrances for the public, etc. You can find the full set of rules in LEED's MPR Supplemental Guidance.
We are working on a combined mall and office building in central europe. We are about 12% short on the Source EUI to achieve the prerequisite so it could be the long road to get this down to achieve the prerequisite. The mall is densely populated and so not really comparable to american malls as we believe portfolio manager to be tailored towards. So I have 2 questions;
1. Has anyone sucesfully issued a CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide to pass the prerequisite based on intent? The building has achieved a 8-12% energy saving for the last three years and we are comfortable we can reduce further but it will take time and the client is keen to progress the certification process.
2. I am not sure it's possible with what we have but can we progress with Option 2 if we define 10% of the area as service areas such as telephone companies, dry cleaning, post office, banks, etc. The area description says to include corridors in the gross - perhaps we could include the circulation mall area for this or am I clutching at straws?
Also we feel we are a unfairly hit by the black box calculation as changing the location seems to make no difference to the annual weather-normalized Source EUI which seems a bit unfair considering the hot summers and cold winters encountered in the region. I may be missing something but if anyone can shed light on this then I would be appreciative - perhaps another issue to raise in a potetnial CIR?
Looking forward to your comments
I don't think that the proposed CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide would be successful but I do think that two other options could work.
1. It does seem possible that USGBC/GBCIThe Green Building Certification Institute (GBCI) manages Leadership in Energy and Environmental Design (LEED) building certification and professional accreditation processes. It was established in 2008 with support from the U.S. Green Building Council (USGBC). would allow the project to pursue Option 2 of the Case 2 calculator even though the primary spaces would typically fall under Case 1. I think it would require a formal CIR to get approval but you may want to reach out to GBCI informally to confirm. I think the trick with the CIR would be to demonstrate why comparison against the CBECSThe Commercial Buildings Energy Consumption Survey (CBECS) is a national sample survey that collects information on the stock of U.S. commercial buildings, their energy-related building characteristics, and their energy consumption and expenditures. Commercial buildings include all buildings in which at least half of the floorspace is used for a purpose that is not residential, industrial, or agricultural, so they include building types that might not traditionally be considered "commercial," such as schools, correctional institutions, and buildings used for religious worship. CBECS data is used in LEED energy credits. data set (according to Case 1) isn't appropriate for your building. Then, you can reinforce how Case 2, via the historic or historic with comparable buildings path, yields a more appropriate benchmark.
2. The other option would be to pursue the pilot credit EApc67 Energy Jumpstart. This option requires significant savings over a short period of time but may work in your case.
Good luck and curious to hear how it works out.
I agree with all that Ben said, and have just a little to add at a more general level.
Don't feel too discouraged that changing the location of your building results in little to no change in its energy performance. You'd be surprised at how much/how little the performance of buildings depends on local climate, depending on their size, age, and usage category. I.e., I would not necessarily expect a big, modern building used mostly as a mall to be highly sensitive to local climate conditions.
Said another way: other factors are often bigger drivers. That's what ENERGY STAR sorts out for "ratable" usage types, and also what LEED's off-line calculator tries to do for other usages, though with less precision.
So, although your situation is outside the U.S. Norm in some ways, the U.S. Procedure might still be more valid than you'd think at first blush. Don't give up on it too quickly.
Is there a correlation of PUE (Power Utilization Effectiveness) and Energy Star rating? We have an existing DC facility with a PUE of 1.55 which gives a score of 100 when entering full energy details, which appears to be extremely good for the process. Has anyone experienced the issue or relating PUE to the level of Energy Star rating?
I don't know the answer to your question exactly but ENERGY STAR has a number of FAQ documents related to data centers and PUE. Here are a few that might shed some light.
I have a question about the following statement from above :
"We have an international project and the space type is eligible for an Energy Star rating. Can we pursue Case 1 to demonstrate compliance given the recently released alternative compliance paths for international projects?
Yes, international projects that are comprised of ratable space under Energy Star must still pursue the EAp2/EAc1 via Case 1."
Does it mean that it is possible to obtain an energy performance rating from Energy star for any project/location outside US as long as the building type is ratable ?
If someone has a feedback about this specif case I will be glad to get some details .
Thanks in advance
In a case of an office building which has an underground parking serving the building which has a surface area larger than the office spaces how should this issue be handled with Energy Star Portfolio Manager? If parking area exceeds office area then the Portfolio Manager does not come with a result (stating that the building has a predominant use of parking instead of office). Should the parking area and the corresponding energy usage not included in the tool at all or should it be included in the GFA instead?
I think the only way to make it work is to submeterSubmetering is used to determine the proportion of energy or water use within a building attributable to specific end uses such as tenant spaces, or subsystems such as the heating component of an HVAC system. the energy use for the parking garage and then exclude it, and its energy use, from the profile on Portfolio Manager. The parking area can't be included in the GFA of the office space.
Thank you Ben. The energy use related to parking is submetered and consequently neither the parking surface area nor the corresponding energy use will be entered in the relevant tab.
I would like to certify a two story, 3,800 s.f. office building. When generating the Energy Star performance report one question asks to confirm that the building area is 5,000 s.f. or greater. How is this ES requirement viewed in comparison to the LEED Minimum Requirement area of 1,000 sf?
Since the building isn't eligible for an Energy Star score because of the minimum floor area criteria, the building would need to demonstrate compliance for EAp2 via the Case 2 calculator.
To comply with the requirement of this prerequisite, data verification checklist and SEP should be submitted. The last part of the documents are "Signature and Stamp of Verifying Licensed Professional", but it seems the "Licensed Professional"can only be found in USA. Our project is in China and does not apply a Energy Star (just get the rating number in portfolio manager).
Is it a must to have the "Licensed Professional" signed on the "data verification checklist" and "SEP"?
No, this is not necessary for LEED Certification.
How should a Data Center building facility be included in the Portfolio Manager? The building hosts the data center and the supporting offices. In particular, 60% of its GFA is allocated to pure DC mechanical equipment whereas the rest 30% is for supporting offices and 10% for circulation. Should the office use be included independently or should it be disregarded and the data center GFA should be entered as “Data Center use” in its entirety?
We have a client that has approached us about the possibility of certifying a golf course clubhouse via LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems.. I was wondering if anyone else has had past experiences with this and can recommend a route to take for achieving this prerequisite and the points attached to EAc1. It appears that creating an ENERGY STAR portfolio manager account and using the case 2 calculator would work best. However, I am uncertain what to classify the space type as in Portfolio Manager. I am thinking maybe "Entertainment/Public Assembly" seems appropriate. Any advice is appreciated, thanks!
Yes, your guess about the proper space type seems reasonable. However, one thing you could do to be sure is submit a customer service request to EPA with your question. If EPA gives you an answer in writing, the LEED reviewers should accept that without further comment, so then you (and your client) won't have to wonder.
Hi, I am involved in EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems. case located in Korea.
I have a couple of Qustions based on the case.
We needs to meet the requirements of LEED O&M Certification EA Pre-requisite Case2 option1. Thus we are using EnergyStar Portfolio Manager to prove that our project has achieved 19% energy consumption reduction compared to the data from Portfolio Manager national average EUI consumption data report. In order to use correct data for certification, which of the Site EUI or Source EUI should be used?
The Portfolio Manager addresses only the consumption reduction of Source EUI in % but not the Site EUI % (though we can calculate % of the Site EUI reduction by ourselves while the actual amount of Site EUI is written at the report).
Secondly, we have downloaded Case2 Calculator v1.2 from this USGBC link “http://www.usgbc.org/resources/leed-ebom-v2009-eap2-eac1case2-calculator-v12”. And would like to know if the Excel template is compulsory to be filled and submitted as a part of LEED Certification proof data.
Please let me know if I have an inappropriate approach for my proof data of LEED Certification.
Thank you very much in advance
p.s I appologize for such long question :/
You need to use source EUI for EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems., and yes, you must include the completed LEED calculator as part of your application.
I do have a industrial plant trying to certify under LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems.. As you may know it is not possible to generate an energystar score for this type of building, so i'm supposed to use the offline calculator (Case 2) to prove compliance. However, there is no baseline Adjusted Avarage Source EUI for industrial plants in the calculator. How should i proceed?
You are correct - the calculator includes no baseline for Case 2, Option 1. You'll need to proceed using Case 2, Option 2, choosing either Option 2a, 2b, or 2c depending on how much effort your project team wishes to invest in the process and how many EAc1 points you want.
Does LEED require the costs of the energy to be entered
Would be the cost of electricity consumption or the value of green power purchased? Being the first case, you can inform, but it is not an obligation.
We are working on a multi tenant enclosed mall with aproximmatly 120.000, to be certified LEED 2009 EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating systems.. In Portfolio Manager, "enclosed mall" is not eligible to receive EnergyStar score. According to the requirements of EAP2, not eligible buildings should consider CASE 2. Reading the reference guide it seems that for CASE 2, I can choose without any restriction one of the three options (2a,2b and 2c) in order to cumply with this pre requisite (Project Outside US). Is this correct?
Thank you in advance!
Yes, if you're using Case 2, Option 2, you can use Option 2a, 2b, or 2c at your discretion. But keep in mind that in general, you can also use Case 2, Option 1. I cannot recall if it offers you "mall" as a space type, but if if does, you can use Option 1.
Does anybody know whether chilled water and AHU1.Air-handling units (AHUs) are mechanical indirect heating, ventilating, or air-conditioning systems in which the air is treated or handled by equipment located outside the rooms served, usually at a central location, and conveyed to and from the rooms by a fan and a system of distributing ducts. (NEEB, 1997 edition)
2.A type of heating and/or cooling distribution equipment that channels warm or cool air to different parts of a building. This process of channeling the conditioned air often involves drawing air over heating or cooling coils and forcing it from a central location through ducts or air-handling units. Air-handling units are hidden in the walls or ceilings, where they use steam or hot water to heat, or chilled water to cool the air inside the ductwork.'s must be operating to use portfolio manager. We have a client that just does not turn on corridor 100% OA units for his building. As a result, a second chiller is literally never utilized. Cooling towers are always operating at half their capacity. The building scored a 98 on portfolio manager. Fantastic score but it seems kind of unethical to not inform USGBC that some equipment is perfectly functional but just turned off.
Turning things off is one (very good) way to increase your PM score. There's nothing unethical about not running the equipment from the energy use perspective.
Good question, but why would the corridor units be 100% OSA? Also, what are the CO2Carbon dioxide levels and occupied space temperatures like? I don't think it is ethical to allow your air quality and space temperature control to deteriorate in the name of saving energy.
Good point Peter - I actually thought of that. If IEQp1 is met then is it unethical to provide less than the maximum possible? The trade off between energy and occupant health and comfort is a difficult area...
Whether they should operate is one question, whether you need to tell GBCIThe Green Building Certification Institute (GBCI) manages Leadership in Energy and Environmental Design (LEED) building certification and professional accreditation processes. It was established in 2008 with support from the U.S. Green Building Council (USGBC). they are not operating is another (although they should be able to see that in the BOPThe Building Operating Plan (BOP) is a document outlining on-going preventive and/or predictive maintenance and operations protocols for the intended operation of base building systems. .)
What is the building function? There is natural ventilation?
Hi, we are trying to certify a core and shell office building which has an electrical meter for the common areas and independent meters for the tenants, but we don't have access to the electricity consumption records of the tenants. The question is, how should we benchmark the building energy consumption, can it be performed just for the common areas or must it be done for the whole building including the tenants?
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