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 GBCI 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.
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 sytems., 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 sytems. 2009 project in Denver, Colorado.
This annotated sample of the LEED Online form demonstrates how to document EAp2 and EAc1.
The following links take you to the public, informational versions of the dynamic LEED Online forms for each EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems.-2009 EA credit. You'll need to fill out the live versions of these forms on LEED Online for each credit you hope to earn.
These links are posted by LEEDuser with USGBC's permission. USGBC has certain usage restrictions for these forms; for more information, visit LEED Online and click "Sample Forms Download."
It's almost certainly your 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. - I suspect Labs21 doesn't have many labs from that region in the database. Include all climate zones in your next benchmark attempt (rather than just the zone you are located in) and you should get plenty of results. There are plenty of labs in there in your Lab Area Ratio grouping.
Hope that helps,
Dear Experts, does anybody know, if I can use the "Case 1" of EAp2 (using Portfolio Manager) or not? The Project is located in Germany and registered at 2011 October, 21th.
The rating systems has changed in October 2011 with ACP rules, but there is no general ruling about ACP's abailable.
It would be very helpful, fy anybody can help. Thanks a lot. Tobias
Presuming that your project meets the basic requirements for Portfolio Manager, you can use Case 1. I have recently clarified the language regarding the application of the new ACP and they are NOT MANDATORY. We can continue to use Portfolio Manager for international projects - the ACP offers a new alternative.
You can go to this link where the USGBC confirmed that international projects are eligible to use Case 1 - http://www.leeduser.com/topic/international-projects-alternative-complia...
The important part is below.
"Thanks for your question about EAp2 and EAc1 for EB projects outside of the U.S. The language stating that Case 1 was not available to projects outside of the U.S. was erroneously included in the Rating System with ACPs. The case IS available to projects outside of the U.S. and the box stating otherwise has been removed from the Rating System."
Michael, Eric, thanks a lot! Finally I've received a official answer from the gbci:
"Thank you for contacting the Green Building Certification Institute. We apologize for any confusion on this matter. Your project team is able to show compliance with EAp2 through Case 1 - Projects Eligible for Energy Star Rating."
Hope that the rating system will be updated asap to avoid more confusion in this matter...
Best regards from Berlin, Tobias
Glad to hear you got through to the GBCI. The USGBC has new feedback forms for international projects and it might be useful to let them know about the confusion being created by not updating the documents accurately.
I understand the USGBC is going to have workshops with the international roundtable members to try and resolve some of the small, but very annoying, issues we have in Europe.
I have a caveat--I'm actually just discovering this now so I don't know whether there is an immediate solution, but Energy Star is requiring me to have a licensed engineer or architect to sign a statement in order to generate an energy star rating. All the architects and engineers on this project are licensed with international licenses. None of us have a US license. So I'm not sure how this will have to be sorted out. And since we just have 2 weeks to complete all the data and submit, and it requires the statements to be mailed in, again I'm not sure if we can manage this in time. I may figure this out myself within today but if anyone has advice, please comment thanks!
Melissa - You shouldn't need a PE or engineer to generate an Energy Star rating; the PE stamp is required if you are seeking to earn an Energy Star label, which is a step beyond the rating. You can document your Energy Star rating simply by generating a 'Statement of Energy Performance' via Portfolio Manager. Having a label (formal approval of your Energy Star rating by the EPA Energy Star folks) streamlines the documentation required for your EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. submittal but it is not required for EBOM.
Hope that helps,
Dan, I'm grateful for your reply. I'm afraid I need some more hand-holding. I had already generated the SEP, but it seems to be nearly blank. While the project page on line shows a rating of 95, the SEP Energy Performance Rating is N/A, and there is no Energy IntensityThe ratio of consumption to unit of measurement (floorspace, number of workers, etc.) Energy intensity is usually given on an aggregate basis, as the ratio of the total consumption for a set of buildings to the total floorspace in those buildings. Conditional energy intensity and gross energy intensity are presented. The energy intensity can also be computed for individual buildings. rating either. Of course I will need the energy intensity to complete the LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. application. I've got 12 months of meters input, here are no "alerts", I've shown 100% of coverage by meters so I'm stumped. Any ideas?
Dan, a cheerful update. There was a very odd solution. Though I'd uploaded a year's worth of data, I had to request a summary for the year ending in January, not February. I don't know why, its less than 12 months. But my rating and energy intensityThe ratio of consumption to unit of measurement (floorspace, number of workers, etc.) Energy intensity is usually given on an aggregate basis, as the ratio of the total consumption for a set of buildings to the total floorspace in those buildings. Conditional energy intensity and gross energy intensity are presented. The energy intensity can also be computed for individual buildings. popped up. Discovered this quite by accident. Anyway your comments were helpful.
This question is specifically about taking info from Portfolio Manager and putting into LEED online v.3. My project building is not eligible for Energy Star because it is an office building that is less than 5000 sq.ft. I completed the eligibility tab on the EAp.2 case 2 Calculator and it looks like we fall under Option 1. So I also completed entering energy data for 12 months into Portfolio Manager and printed out the Statement of Energy Performance. Do I then take the number from Statement of Energy Performance under "Energy IntensityThe ratio of consumption to unit of measurement (floorspace, number of workers, etc.) Energy intensity is usually given on an aggregate basis, as the ratio of the total consumption for a set of buildings to the total floorspace in those buildings. Conditional energy intensity and gross energy intensity are presented. The energy intensity can also be computed for individual buildings." heading for "Source" and put into Section IV of calculator where it asks for "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" or do I use the number listed under "Energy Intensity" heading for "Site"? I can not find an explanation of these numbers on the Portfolio Mgr website. It makes a difference in whether my project complies with pre-req or does not. Thanks!
Rather than using the Statement of Energy Performance, I would set up a new "view" in the Facility Performance area of the building on Portfolio Manager that includes the building's 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. This value may be slightly different than the one that shows up on the Statement of Energy Performance.
Don't use the Site Energy Use Intensity.
Also, it's a good idea to include a screenshot with your submittal documentation highlighting the 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 on Portfolio Manager.
Thank you Ben for information. Unfortunately, using my building's 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. intensity for the past year, we do not meet requirements under EAp1 Option 1. We made HVAC change and added insulation mid-year last year, so my only hope is that those changes will result in reduction of energy used as we proceed through this year. If I don't meet minimum requirements using Option 1, am I allowed to use Option 2? If so, do you know of best place to find help with using Option 2.
Janna - I'm pretty sure that you have to stick with Option 1 in this case. Option 2 is only triggered if more than 10% of the space is "All Other - Not Classified" or "Service". Hopefully you can pick up some efficiency with the new changes.
Our building is located in Egypt. It is a training facility specialized in IT programs for post-graduates and it is not eligible for Energy Star Benchmarking and the national average 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 are unavailable. Our building is considered new as it is only occupied from 2 years. I do not know which option under EAp2 to follow. Since our building is located outside U.S., we have only four options to follow (2b, 2c and ACP option 1&2). The issue is we do not have historical data for the building for 3 years as it is only occupied from 2 years. The 3 years historical data is required by option 2b and 2c. For ACP option 1, it requires to benchmark against national average source energy data from the national energy agency which are not available. If national average source energy data are unavailable, then we have to follow ACP option 2 which requires to benchmark against the energy data for at least three comparable buildings which is extremely hard to get in Egypt. What am I suppose to do?
It seems like your understanding of the options is correct though not that promising. The only other option would be to propose an alternative compliance path through a project specific LEED InterpretationLEED Interpretations are official answers to technical inquiries about implementing LEED on a project. They help people understand how their projects can meet LEED requirements and provide clarity on existing options. LEED Interpretations are to be used by any project certifying under an applicable rating system. All project teams are required to adhere to all LEED Interpretations posted before their registration date. This also applies to other addenda. Adherence to rulings posted after a project registers is optional, but strongly encouraged. LEED Interpretations are published in a searchable database at usgbc.org..
I think Ben is exactly right - when all the existing options are exhausted, the onus is on the project to propose an alternative compliance path that meets the intent of the credit. That may be rather difficult, or it may require meeting a standard of performance that feels particularly challenging (for example, comparing your facility to similar facilities outside of Egypt, if you can find data for those). But its up to you to formulate a reasonable alternative and convince GBCI that your approach is valid - the project-specific LEED interpretationLEED Interpretations are official answers to technical inquiries about implementing LEED on a project. They help people understand how their projects can meet LEED requirements and provide clarity on existing options. LEED Interpretations are to be used by any project certifying under an applicable rating system. All project teams are required to adhere to all LEED Interpretations posted before their registration date. This also applies to other addenda. Adherence to rulings posted after a project registers is optional, but strongly encouraged. LEED Interpretations are published in a searchable database at usgbc.org. is the right way to do this. Good luck with it.
Has anyone entered November energy data in Portfolio Manager and looked at the score? I hope you weren't counting on the energy points your project had before November.
"New National Median Benchmarks
Effective November 7, 2011, EPA will introduce new National Median performance targets within Portfolio Manager. The median value represents the middle of a distribution: half of the buildings have better energy use intensity (EUI) values while the others have worse EUIs.
The new National Median performance targets will replace the National Average values that are currently in Portfolio Manager. That is, for all instances where a national average is currently displayed, the value will be replaced with a National Median. EPA is making this change because the National Median has been determined to be a better benchmark point of comparison for existing buildings."
Always good to print out a "Statement of Energy Performance" before any changes to Energy Star Portfolio Manager are scheduled to occur.
If the period of performance is finished before the change and you take print screens of the portfolio manager data it might work out. The issue with the change from mean to median is that it appears for many of the building types the energy performance is harder by at least 24%. That's potentially a huge difference in resultant points for the same energy use. I'm all for accurate benchmarking, but I don't like the rule change in the middle of the game.
I noticed that the Case 2 Calculator has not been updated since the November Portfolio Manager update. Will buildings still be benchmarked against the average source EUI (instead of median source EUI)? We have a customer building in the entertainment/culture category and if we go by the case 2 calculator, which has an avg. source EUI of 265 to benchmark against, the project gets 15 or so points. If we benchmark against the median source EUI of 94, which is now in Portfolio Manager, the project doesn't even meet the EAp2 pre-req. Which should we go by?
We are working on a retail/catering facility that we cannot currently certify as NC because the addition we are doing is not large enough to qualify. However we cannot go for EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. certification right now because the renovation is too big to qualify. We would like to certify the building in a few years under EBOM once the renovation is done and we can qualify. Right now we are trying to calculate what the energy requirements will be for the EBOM 2012 version for our building, so that we can design within those guidelines to facilitate certification. The 2012 version offers 3 pathways for energy calcs, but I don't think we qualify for any.
1. Energy Star Score - we are not elegible for a score due to our mix of space typologies.
2. Benchmark again Typical Building - The DOE websites says that due to budget cuts they are not doing the CBEC Survery this year. Can we use an old survey?
3. Demonstrate Energy Efficiency - This would require us to wait three years after construction of the renovation. Not only that, it would require us to show a 20% energy improvement over that time period. This creates a weird incentive to design the building really inefficiently so we can show progress - not something we are interested in proposing to the client.
Any thoughts, we are at a loss as to what sort of energy intensityThe ratio of consumption to unit of measurement (floorspace, number of workers, etc.) Energy intensity is usually given on an aggregate basis, as the ratio of the total consumption for a set of buildings to the total floorspace in those buildings. Conditional energy intensity and gross energy intensity are presented. The energy intensity can also be computed for individual buildings. standard we should be shooting for...
My first suggestion here is that you confirm your project is unable to certify now in either NC or EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. because of renovation / addition activity. That would be unusual, as LEED v2009 does not intend to exclude projects in your situation. Have you reviewed the current MPR guidance and rating system selection guidance to be sure?
If you stick with v2012 then I recommend Option 2. The reason is simple: Option 1 references ENERGY STAR, which in turn references the "current" 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, which happens to date back to 2003. Option 2 in v2009 also ultimately references the 2003 CBECS. If CBECS is not updated soon then LEED will have little choice but to continue referencing the same CBECS version it does now, i.e., the 2003 data. I would expect this to apply to both Option 1 and Option 2 in LEED 2012.
So, although there are no guarantees, I believe your safest bet is to stick with #2, and select an EUI target relative to CBECS 2003.
Hello we are a LEED-EB O&M V3 Certified Project and are planning a major remodel of our existing building. Including Re-Location of entire existing central plant. We are planning to replace all Chillers, Cooling Towers, Primary Circulating Pumps, Heating Hot Water Boilers, and all auxilary related equipment. If this is the case, what happens to our existing LEED-E.B.O&M V3 Certification? And more importantly what happens to our awarded Energy Credit Points? Does the new Central Plant now become the new Baseline for Energy consumption measurements? What can we do in the meantime to prepare for this possible change?
Chief Build. Engineer
You are still a LEED Certified Building. When you go to re-certify under EB-OM, your score on the energy credits will be based on the new installation, which I would hope is more efficient than the existing equipment.
If you are undertaking a major renovation in addition to moving the central plant, you might be able to use LEED - NC instead of renewing your EB-OM Certification.
What is considered a Major Renovation, is there a certain square ft criteria ? Because there is going to be a major renovation as well as relocation of central plant.
Do you know what BD-C is with regards to LEEDs
You can see the USGBC's Minimum Program Requirements for LEED NC 2009 here.
You can also see the Rating System Selection Guidance document.
We are experiencing difficulties in acquiring a coherent rating from Portfolio Manager for a Hospital in São Paulo, Brazil.
As we input all the data, PM is giving us a rate of 100, which does not make sense for this particular project. We suspect that it has to do with the occupied areas. Should we factor in bathrooms, staircases, hallways and elevators in the total area of the Hospital? Or PM works with the pure and simple gross area of the facility?
It sounds like maybe it is an area issue if you are only including the regularly occupied areas.
Here is the rule on area measurements, as well as the link the Licensed Profession Guide to Energy Star (which is were the below came from):
"The user-entered value for area must be the gross total area of the building. This value is measured from the principal exterior surfaces of the enclosing fixed walls and includes all supporting functions such as kitchens and break rooms used by staff, storage areas, administrative areas, elevators, stairwells, atria, vent shafts, etc.
Additionally, the following must be noted:
- Existing atriums should only include the base floor area that they occupy.
- Interstitial (plenum) space between floors should not be included in total.
- 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.) is not the same as leasable space. Leasable space is a subset of a building‟s gross floor area.
I have a large high rise with a data center in it. It's last Energy Star rating was September 2010. This year, I am not going to qualify for an Energy Star rating for two reasons: (1) we have had a hellish summer and our kWhA kilowatt-hour is a unit of work or energy, measured as 1 kilowatt (1,000 watts) of power expended for 1 hour. One kWh is equivalent to 3,412 Btu. is off the charts, and (2) new Energy Star requirements do not allow me to consider my server room as IT energy unless it is sub-metered. So I am about to lose my Energy Star rating. What do you recommend I do if I want to LEED Certify the building? What are my options?
Can you clarify what's about to happen? Is your ENERGY STAR label (plaque) about to expire, or is your ENERGY STAR score about to drop below 69 (the LEED minimum)?
Both. The label is expiring and we will not be able to renew it because the building will not score as well this year.
There are a couple of things going on here, but the bigger hurdle is the IT space. Have you determined if the space meets the definition of a Data Center in ENERGY STAR? A Data Center space applies to spaces specifically designed and equipped to meet the needs of high density computing equipment such as server racks used for data storage and processing. These facilities have uninterruptible power supplies, designated HVAC, and raised floor space.
If your room does not meet the definition of a data center but also has separate cooling systems and different operating hours than rest of the building, the room can be entered as a separate space in Portfolio Manager using the Office space type. In the space details, enter the weekly operating hours, zero workers, and a number of PCs that approximates the number of servers in the space. AND you won't need to worry about submeteringSubmetering is used to determine the proportion of energy use within a building attributable to specific end uses or subsystems (e.g., the heating subsystem of an HVAC system)..
As for the bad summer, it is important to remember that ENERGY STAR takes into account your building's energy performance by location and climate, so an increase in cooling demands for your building will be normalized according to similar buildings in similar climate zones. Therefore, I'd encourage you to continue to update your Portfolio Manager account monthly and track your progress if you haven't continued to do so.
But the bottom line is if your building is below a 69, it's a no-go for LEED-EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems..
I hope this helps.
My project building is one of 40+ on a company's campus/site. They do not purchase electricity on a building-by-building basis, but for the entire site. My project building is metered and the information from that meter is what's been entered into Portfolio Manager. I can produce 3 months of electric energy bills for the site (along with 3 months of fuel oil bills, again for the site, which provides the district steam to the project building). I can determine the cost of my buldings electric usage using the building's meter and the charges to the site if this will be appropriate, as well as make a similar estimate of the fuel oil component based on steam usage. Is this a case where I will need to document/explain a special circumstance?
I'm not sure I completely understand your question. There might be two issues here:
1) that you do not have a full 12 months of metered energy data for your building for all energy types (a requirements / compliance issue), or
2) that your energy bills do not separate out the usage of your building (a documentation issue)
#2 is much easier to fix than #1. Is #2 the only issue here?
Thank you Mike. The issue is #2, the energy bills are not separated out for my building.
Please, could someone answer what to do for issue #2, when the energy bills reflect an entire campus rather than the single building we are trying to certify? Thanks.
As long as the project building has a separate meter for all energy sources, it doesn't matter necessarily if the bills are for the campus. In this case, I've seen project teams in the past submit the monthly readings from the building's meters, along with an explanation of how the data is read, verify calibration of those meters as is always required, etc, and explain why the values on the bills are different from the values used in Energy Star.
We are trying to classify a winery. One of the areas is used for barrel fermentation, and is temperature controlled anywhere from 55-75 degrees based on the fermentation process. Would this count as un-refrigerated warehouse space? We believe that it should be Other based on the fact that it is production space and has a higher energy usage than a typical un-refrigerated warehouse.
Second, we have a large space full of tanks for different fermentation processes. These spaces are unconditioned as each tank has its own insulation and temperature control system. We do not believe that this should count as unconditioned space because that does not reflect its actual energy use in any way. Would this fall under Other, general warehouse, unconditioned space?
You may want to reach out to Energy Star directly since it's important to get the space classifications right, but to me the fermentation room sounds like it would be more energy intensive than a warehouse space. Sounds like "Other" to me, but again I'd suggest verifying with Energy Star.
In my project there is an absorption chiller supplied by district heating. The building itself is also heated by district heating. The two district heat quantities (one for heating, one for cooling) are metered separatly.
Would it be right to enter the two meter to Portfolio Manager? If both account for heating, that wouldn't make sense. has anyone of you a solution?
The energy usage should be based on whatever is coming from outside the property, so if there are two separate steam meters then both would be included, even if some of the steam is used for cooling equipmentThe equipment used for cooling room air in a building for human comfort. rather than heating.
If one of these was a 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. to the other, then only the main utility level meter would be included.
From your description of separate meters, both would be included in Portfolio Manager.
My building is located on a university campus and contains just 2 classrooms and 3 lecture halls (~15.5 ksf). It's a relatively new building constructed in 2007.
Based on Energy Star's definitions of space types (http://www.energystar.gov/index.cfm?c=eligibility.bus_portfoliomanager_s...), I am unable to receive an Energy Star rating for my building. I entered in energy consumption data on Portfolio Manager and was able to classify it as "Other - College/University (campus-level)." This compared my building's source EUI score of 177 to the national average of 280.
First of all, I am not sure what "campus-level" refers to.
Second of all, when I begin to use the Case 2 calculator, "College/University" is not an option. The only similar options presented are "Education - K-12 school" and "Education - general." When I choose "general," the national average source EUI is 115 which is MUCH lower than "college/university"s national average souce EUI of 280 found on Portfolio Manager. Then when I run it as "K-12," the source EUI is 169 which is also much lower than "college/university" and is also lower than my building's EUI.
So when I use the Case 2 calculator, it does not meet the minimum requirement when I believe it should based off of Portfolio Manager. What should I do?
Within the "Other" category in Energy Star, there are actually two options for the subclassification: "Education" and "College/University - Campus Level".
I can't find the official definition for the "Campus Level" designation, but my understanding is that is the average EUI for all buildings across a campus (labs, dorms, classrooms, gyms, offices, etc), and that it would not be acceptable to try to apply that value to a single, specific building.
The definition for the general "education" classification in Energy Star does seem as though it would fit your situation (from http://www.eia.gov/emeu/cbecs/building_types.html#Education):
"Buildings used for academic or technical classroom instruction, such as elementary, middle, or high schools, and classroom buildings on college or university campuses. Buildings on education campuses for which the main use is not classroom are included in the category relating to their use. For example, administration buildings are part of "Office," dormitories are "LodgingLodging are facilities that provide overnight accommodations to customers or guests, including hotels, motels, inns and resorts.," and libraries are "Public Assembly."
The source EUI for this space type in Energy Star is close to the "Education - General" option within the Case 2 Calculator.
So, it seems like maybe you'll need to take a look at energy efficiency opportunities in your building to get the EUI down.
A central chiller plant supplies chilled water to our project building and several other buildings. In order to generate the Energy Star report, we are required to input the chilled water energy consumption in BtuA unit of energy consumed by or delivered to a building. A Btu is an acronym for British thermal unit and is defined as the amount of energy required to increase the temperature of 1 pound of water by 1 degree Fahrenheit, at normal atmospheric pressure. Energy consumption is expressed in Btu to allow for consumption comparisons among fuels that are measured in different units..
With reference to the following equation, instead of having the Btu meter directly, would having both a temperature sensor and a flow meter installed on the chilled water suffice?
500 x Flow Rate [gal/min] x Delta T [F] = [Btu/h]
In principle that would be fine - LEED does not care how your metering is set up, just that you're measuring (and recording) the energy flowing into your building.
My one suggestion is to ensure that the quality of the metering and data logging is good enough. If you're measuring supply & return temperatures and water flows separately, just make sure you're doing it properly and robustly so you'll get accuracy and precision similar to what a dedicated, unified BTUA unit of energy consumed by or delivered to a building. A Btu is an acronym for British thermal unit and is defined as the amount of energy required to increase the temperature of 1 pound of water by 1 degree Fahrenheit, at normal atmospheric pressure. Energy consumption is expressed in Btu to allow for consumption comparisons among fuels that are measured in different units. meter would provide.
We have an 180,000 sf dormitory and trying to get an ENERGY STAR rating through Portfolio Manager. We have run into some issues with our facility because the dorm consists of 4 dormitory housing buildings (over 40,000sf) and 2 small office and study buildings under 5,000sf. They are all under the same management, same meter and operate as one facility.
In order to get an ENERGY STAR rating, we have to separately rate each building. Because the 2 small office and study buildings are under 5,000sf, we can't get a rating for them.
Is there a way to get a rating for the whole dormitory facility or will LEED allow us to exclude the two small spaces because they are under 5,000 sqft?
This issue can get real tricky real quick, so I'm not surprised it's come up. Before we get too far into the weeds here's a general rule of thumb: if you can find a solution using existing, published guidance then you should try that, as it will minimize your risk of delaying the LEED review.
This rule may sound obvious, but what makes it complicated for your topic is that several pieces of guidance out there might offer ideas or pieces of a solution but they're in different places:
1) ENERGY STAR's rules about how to treat multiple buildings
2) USGBC's rules on multiple buildings, as described here:
3) USGBC's rules related to the MPRs, which define which projects are a good fit for LEED itself:
So I'd suggest skimming each of these resources and seeing if any pre-approved solution jumps out at you. If it doesn't, then check in here again and we can take a deeper dive.
I am working on achieving LEED for a convention centre in Canada. Since the facility type falls under "Other - Entertainment/Culture", we are required to use Option C3 (Energy Baseline Including Historical Data plus Comparable Buildings).
My first question revolves around the comparable data I am using. All of the energy consumption data is from 2008 (the most recent year we could consistently acquire from other convention centres across Canada). Is it okay to use this information from over two years ago, or does it need to be more recent?
My second question has to do with the calculator itself. The macro in the program does not seem to be working properly as the information I am inputting in Table 8 is not transferring to Table 9. A red note on Table 9 states that there is "Data Missing from Table 8". To the best of my knowledge, I have input all of the relevant information. Is there any chance the file from CaGBC is not working correctly? If anybody can shed any light on this for me, it would be greatly appreciated!
The historical energy use data of the project building can include three years of consecutive data within the previous six years of the start of the performance period. Energy use data from three comparable buildings must inculde two consecutive years.
To normalize your building's historical data with comparable buildings I would use similar years for both. For example, use 2006, 2007 & 2008 energy data from your building + 2007 & 2008 from three comparable buildings to create a baseline.
Also, LEED Online only asks for one year of energy use data from comparable buildings even though the LEED reference guide asks project teams to gather 2 years of data.
Don't know what's going on with the online calculator.
Thanks for your response David. I should have clarified that we are doing the CaGBC version of LEED EB:O&M, so we don't have an online calculator, we have an offline excel calculator that's pretty buggy and causing some headaches. We'll continue to wait for CaGBC's answer on that though.
Which path is to be followed for an office building outside the US? Is this considered to be eligible for an Energy Star rating? If not, what are the choices of setting a benchmark?
Thanks for any replies,
Omer, office buildings outside the U.S. can (and should) use Energy Star Portfolio Manager to benchmark their performance.
1. Do international projects still compare with the US average as their baseline EUI? It will not make any senses, so where can I adjust climate data to make sure its comparing with similar weather condition for an international project?
2. What if our building(11F total) has three floors unoccupied which means our total annual energy use will be a lot lower than 100% occupied? Can you deduct the 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.) of these 3 floors from total building gross floor area?
Tristan - Do I understand correctly that office buildings outside the US can no longer use Portfolio Manager to benchmark and must now use the calculator? The October update and the current LEED On-line forms appear to indicate that Option 1 is no longer an option.
I've just done a trial run with the calculator but it is telling me N/A. We're close to full points in Portfolio manager with an EUI of 214 but don't appear to meet the pre-requisite (under Option 1 of the calculator) because the adjusted national average for office space is 182. I suspect this is because the underground parking is included in my 214 but not in the 182.
That would make guaranteeing a Gold certification significantly harder wouldn't it? No worries, see the USGBC response to my query on the same issue below.
"Good news. Looks like it was just a mix up.
"Thanks for your question about EAp2 and EAc1 for EB projects outside of the U.S. The language stating that Case 1 was not available to projects outside of the U.S. was erroneously included in the Rating System with ACPs. The case IS available to projects outside of the U.S. and the box stating otherwise has been removed from the Rating System.""
For the full post you can go here - http://www.leeduser.com/topic/international-projects-alternative-complia...
I am working on a LEED project that was registered under LEED EB: O&M 2008 that is obtaining one LEED rating for the campus. The LEED site boundary includes the majority of buildings on campus, including a couple lodges, dining facility, offices, and educational facilities. Since multiple buildings cannot be benchmarked as a single facility under the Energy Star Portfolio Manager guidelines, would the best approach to achieving the minimum energy requirements be to apply the Case 2 Calculator Option 1 to each building separately on campus?
Hello S W:
I can start by offering some basic guidance to this, and we can get more detailed if we need to. Let's break this down to the key issues:
1) Keep in mind that if a given building CAN be scored using Case 1, then it MUST be. Since you mentioned that some of your buildings are offices, they cannot use Case 2 as you're proposing.
2) More generally, I recommend scoring each distinct building in a campus project separately because that's the approach most likely to be approved in the LEED review. Some buildings will use Case 1 and others will use Case 2, just like if they were not on the same campus.
That makes sense. The campus is actually a training center so almost all the buildings are mixed use in some way, for example the office facilities also have educational classrooms so its almost at a 50/50 split. In this case do you think I can use the Case 2 calculator and break each building down into the space types that it includes? We are also having difficulty because there is no "Education-University Buildings" space type in the Case 2 calculator. I found 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 from 7/31/2009 that states the Education K-12 School option can be used instead if the building can be justified as instructional space. So if possible, I would like to break down our Office/Education buildings into "Office" and "K-12 Education."
So as long as each building within our LEED boundary meets the requirement, even if its through different options, it should still be acceptable right? So we will basically have separate documentation for each of our buildings on campus.
Thanks so much!
This can get tricky, but you're almost on the right track. For each of your mixed-use buildings, think of whether each usage type itself is ratable in ENERGY STAR. The ratable types are listed at this site:
In your example, both office and K-12 are ratable types, so that building can (and must) be scored using Case 1. Try that within Portfolio Manager and it should work; no need to use the USGBC's calculator.
If that doesn't work then something else is going on here and you can check back in.
I am working on a pharmaceutical storage warehouse that maintains over 300,000 SF of warehouse space at 72 degF year round due to gov't regulations. We thought this was a specialized case and pursued Case 2 to show compliance. The building has greatly reduced energy usage over the last 5 years and this earned us some points under Case 2. However, we have received review comments back stating that we must pursue Case 1 since it is considered an unrefrigerated warehouse. We do not meet the minimum energy star requirements to meet the prerequisite under Case 1, but we do under Case 2. We still feel that because of the special requirements on the building we should be allowed to pursue Case 2. Has anyone ever had any experience with this or suggestions about how to move forward?
I see some time has passed since your post. If it's not too late for me to help, could you tell me a couple of things:
1) have you looked up ENERGY STAR's official definition of "warehouse" to see how closely that matches your building?
2) where is your warehouse located, and what's the average outside temperature in summer and winter?
The downton high-rise I am attempting LEED certification has an EnergyStar label that just expired on Mar 31, 2011. They would like EnergyStar recertification as soon as possible and attempt LEED certification next year (with their performance period for other elements ending in May/June 2012). They completed a chiller retrofit in Feb 2011, so they would like their LEED EnergyStar score to include summer 2011 data. (Their current score is 86 without the retrofit!) If the building obtains an EnergyStar label in Sept 2011, may I use that score and documentation for LEED credits EAp2, EAc1, and EAc6 if I submit the LEED application in June 2012? Also, if we obtain outside air measurements as required for IEQp1 in July 2011 (to satisfy the ASHRAE 62 compliance piece for EnergyStar certification), can I extend the performance period for IEQp1 to begin in July 2011 so I don't have to repeat those measurements? (I cannot find any LEED documentation regarding the Energy Star "label" performance period "exception" except from a LEEDUser post. Is it "officially" documented anywhere?
Thank you, in advance, for your tremendously helpful information.
Here are a couple of rules-of-thumb that may help clarify your situation:
EAp2/c1 - generally it's OK to use the ENERGY STAR label in the "streamlined path" (documentation shortcut) as long as the label is current, meaning awarded within the 12 months preceding the date you apply for your LEED review. You can also use the ES score corresponding to that label. However, if you want to use a higher ES score that reflects improvements after the label date you would need to provide the ordinary full documentation (no streamlining shortcut).
EQp1 - in EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. any performance period may be extended backward in time up to 2 years preceding the date of your LEED review application. See the introduction of the Ref Guide for details.
Our facility is already a 5 star energy rated building. Is there any way to cut corners on this paperwork?
John, is this a home you are talking about? I am surprised that you can attempt LEED-EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. for a home.
Assuming that is possible, I don't see how you can cut a corner here, no. If you have a good Energy Star rating you should have an easy time of it, though.
Is this Energy Star for Homes in the U.S. that you're talking about, by the way? I thought it used a HERS IndexA scoring system established by the Residential Energy Services Network (RESNET) in which a home built to the specifications of the HERS Reference Home (based on the 2006 International Energy Conservation Code) scores a HERS Index of 100, while a net zero energy home scores a HERS Index of 0. The lower a home's HERS Index, the more energy efficient it is in comparison to the HERS Reference Home., not a 5-star score.
We have a grid tied solar array that we regularly sell energy back to the utility. The LEED form clearly states that they are interesteded in all solar generated, which is 23.5 Mwh. However the Portfolio Manager asks for the amount of enenrgy used by the building and then gives you an opportunity to show the amount of energy sold back to the utility. I am afraid that using the total amount of solar produced I am misrepresenting the actual energy used by the building. Do you know which number LEED is looking for, the total solar generated or the total solar consumed by the building?
Nell, My guess it that Portfolio Manager will deduct the amount that goes back to the utility from the total amount produced, to land at the amount consumed by the building. You might want to monkey around with the inputs to verify this.
Principal, LEED Consulting
The Cadmus Group, Inc.
Commissioning or auditing can improve identify a range of energy-saving measures.
Implementing energy-saving measures a directly helps achieve the desired Energy Star rating.
Ongoing commissioning can lead to added energy savings over the long term, improving the Energy Star rating further.
Use of a BAS can inform operational changes contributing to energy goals.
Accurate energy-use data supports assessment and implementation of energy-efficiency measures.
If increasing ventilation levels, consider the likely increased energy consumption.
Efforts to improve energy efficiency can affect occupant comfort, in good and bad ways. Monitor comfort along with any energy efficiency measures.
Use the Energy Star Portfolio Manager statement of energy performance to help achieve EAc6.
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