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.
A trade group offering publications, process templates and event information.
ASHRAE publishes widely used standards and publishes the ASHRAE Journal.
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.
Version 4 forms (newest):
Version 3 forms:
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."
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.
Thanks Jenny, after more reading it does seem like LEED is only interested in solar consumed by the building. I will make sure my numbers reflect that data.
We would like to solve out some questions about the LEED EB certification process. In this case we have a boundary area with 4 towers. Tree towers are already operating and one is under construction. Of the tree operating towers, only two of them are being certified.
In this case, all the structure of external parking lots, landscaping, roads and grounds are shared with the four towers and will be 100% considered in the certification scope.
Follow on the next lines a more detailed explanation of the situation and our questions about this case:
1)Eap2 – Minimum Energy Efficiency Performance
The areas for Tenants have individual metering for lighting and plugs for each tower. The HVCA systems (Chiller, Fans, Pumps, etc…) are shared and the measurement is made considering the total consumption. All lighting from common areas such as parking lots, facades, elevator halls, grounds and others are also measured together.
To determine the consumption to be added in Energy Star´s Manager Portfolio we have considered the total measured consumption from the areas of the Tenants for each tower (1).
For common consumptions we have considerate the total measured value multiplied by the percentage of built area less the area of the tower that is not pursuing certification (2).
(2) Considered consumption = Total consumption * 77,00%
Note: 77,00% = the percentage area from the two towers under certification in relation to the total Gross Square FootageSum of the floor areas of the spaces within the building including basements, mezzanine and intermediate-floored tiers, and penthouses with headroom height of 7.5 ft or greater. It is measured from the exterior faces of exterior walls or from the centerline of walls separating buildings, but excluding covered walkways, open roofed-over areas, porches and similar spaces, pipe trenches, exterior terraces or steps, chimneys, roof overhangs, and similar features. area for the Three towers in operation.
The total consumption for each tower was obtained by the some of the measured individual consumption for each towers that are pursuing LEED Certification plus 50% of the common consumption (2).
(3) Monthly consumption of each tower = Tenant’s Consumption (1) + 50% of the common consumption (2)
A) Is the methodology above correct to demonstrate compliance to EAp2?
B) Is it necessary create two ratings for these two towers or we can use the same rating for both towers in Portfolio Manager?
I've got the offline calculator for EAp2. Once completed the eligibility requirements do we still need to input at Energy Star Portfolio tool?
The last step is to calculate the percentile above national average for EAp2 using streamlined approach. How can i get it? Please help.
Susan, No matter what option you pursue, including use of the offline calculator, it's necessary to input square footage and energy consumption data into ENERGY STAR in order to generated the weather-normalized source EUI value that then gets plugged into the offline calculator.
Multi-family residential buildings are currently not eligible to receive an Energy Star score in Portfolio manager. Also, they do not have data on national average EUI to use for comparison to show efficiency improvements. Does this mean that multi-family residential projects cannot get certified under the LEED-EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. system since they cannot meet the prerequisite? Is there any guidance on what multi-family projects should do? Has anyone attempted this on another project. Any help is appreciated! Thanks.
Have you tried the USGBC EAp2 Case 2 Calculator for buildings that aren't eligible for Energy Star? There is a "LodgingLodging are facilities that provide overnight accommodations to customers or guests, including hotels, motels, inns and resorts. - Residential - Multifamily" space type avaialable there.
The link above didn't work for me just now, but you can also find the excel file linked at:
Lance...how big is your multifamily building? If there are four or more habitable stories, your building qualifies. As Tristan notes, you'd use the offline calculator to performance the energy benchmarking (which incorporates information from the DOE national residential building energy consumption survey - like 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. but for residential).
If you do go forward with this project, know that there are several credits for which compliance in a multifamily building is not straight forward, and you should use GBCI customer service and/or CIRs to get as much advance clearance on alternative compliance paths as possible.
I'm currently composing a plan for LEED EB on an existing manufacturing campus comprised of multiple building types (warehouse, shipping and receiving facility, manufacturing, office space, cafeteria) at about a 1.5 million sq. ft. Unfortunately, Energy Star does not offer a "manufacturing space type" and we will be forced to classify our buildings as "other" and use the alternative compliance path for the majority of these buildings.
I'm wondering if:
1) I can subtract process loads from energy consumption data? as majority of our energy is consumed through machines necessary for manufacturing.
2) How critical is it to allocate space in Energy Star for bathrooms, mechanical rooms, etc.? (For example, if I have a 10,000 sf office building, can't I just allocate 10,000 sf to office space? or is it imperative to breakdown all of the other areas?)
I appreciate any help anyone may be able to extend my way.
Some thoughts on your issues:
1. Generally speaking, you are not allowed to ignore process loads. You are, however, standardly allowed to normalize them for changes in output production if you have some measurable variable to use (e.g., number of widgets, manufacturing equipment run time, etc). In my experience, occasionally there have been cases where a different approach to evaluating process loads was allowed, but this happened through the 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 process.
2. Within Energy Star, space classifications should generally focus on the main building function and not break out auxiliary spaces, so in your example it would definitely be appropriate to classify the entire are as office. Check out the 2010 LP Guide to Energy Star (http://www.energystar.gov/ia/business/evaluate_performance/pm_lp_guide.pdf) and the Energy Star Guidance for Benchmarking Mixed Use Properties (http://www.energystar.gov/index.cfm?c=eligibility.bus_portfoliomanager_e...)
Hi, I am involved in EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. case with a data center.
As noted above, basically we do not need calibration since we use data from utility bill.
Yet for a data center we have to measure UPS output energy to get rating in energy star.
In my case there are meters for UPS, however since this is for 24 hour 365day facility, they cannot perform calibration. Do you have any idea what I can do for this?
Shoko, My first thought is to look at when the meters where installed, and determine if they are even due for calibration yet. In some case, meters are designed to no require calibration for very long periods of time, and for LEED you can simply document that per the manufacturers guidelines, no calibration is necessarily.
Jenny, Thank you for your comment.
After I sent my question, I found in Energy Metering section of online Form they ask only for "annual site energy usage" and for this amount we do not have to include the data of UPS output. Therefore, I believe we can mark "Energy meters are owned by a third party" not to upload calibration reports, in the case we can use utility bill for the amount of site energy usage, which include IT energy as well.
Do you think this is right understanding?
Shoko, I think you have the right approach here.
I am using the CaGBC's LEED EB:OM 2009 rating system and attempting to determine if the project meets the EAp2 Requirements. It is a multi-unit residential building and as such is not eligible for an Energy Star rating. I am using the Option B calculator to determine the energy savings based on the 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 calculated by the Energy Star Portfolio Manager. The calculator states "Do NOT enter parking/garage space". My question is should I remove the parking area from my Energy Star Portfolio Manager Profile.
Michael - yes, you've got it. Teams using the offline calculator are intended to eliminate parking area from the benchmarking and EUI generation. I'm not familiar with the CAGBC version of the rating system, but that's the requirement the USGBC version, as I understand it.
We also have a project that is using the Case 2 Calculator. I understand we aren't supposed to include parking in the offline calculator, but do we include the energy for site lighting? Most of our site lighting is separately metered, should we exclude that consumption from Portfolio Manager? Thanks!
I am involved in a Cookies and Potato Chips facility (from a well known brand) LEED evaluation. It was built and operates since two years ago outside the US. It has great green features so the owner wants to certify it as Existing Building which is appropiate in this case. The problem is that no similar facility exists on Portfolio manager to get a performance rating. I requested information to Energy Star and they responded:
"It seems that your facility would be classified as "Other - Other." Please note, if your entire facility is listed as any of the "Other" space types, it is not eligible to receive a national energy performance rating"
¿Do you know of how to deal with this situation?
I would be really appreciate any answer.
Jose, many facilities fall under "other." You can follow Case 2 to comply with this credit.
Does this answer your question?
Jose...this definitely sounds like a Case 2, Option 2 situation. You may be in a bind though because of the newness of the facility, as one of the common approaches under Case 2, Option hinges on incorporated historic consumption data from the facility into your baseline. The other option is to self-identify similar production facilities (maybe this company has several plants that produce cookies and chips?). This is one of the more complex benchmarking situations that project teams face, and usually a team will need to use 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 figure out how to proceed.
My project(s) is a Hotel Building with an adjacent Conference Center those are connected by a Tunnel.
The Central Plant which house the chillers, heating hot water boilers, domestic hot water heater, kitchens, laundry facility, etc. are all in the Conference Center building to serve both buildings.
As far as metering, there is only ONE meter for each service (Gas, Water, Electricity).
The first question is: Can I certify this building with Energy Star as one building with "HOTEL" or the seperate them into a "Hotel" and "Others" for the conference center. This would require adding submeters for each service.
The second question is: Can I certify these two buildings under one Certification Process for LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems., or they have to be two different certfications?
Jalal - Energy Star has pretty specific guidelines on whether and how to benchmark facilities like this (in terms of including all SF as one building, or splitting them up). I would recommend reaching out their customer service to see if they will allow you to consider this a single facility. If Energy Star allows it, LEED will generally also be okay with treating it as one facility.
Jenny, I did contact EnergyStar and they are specifically clear on how this need to be labled. They are TWO different buildings and two different performances.
The Question is now:
Can we Certify the two buildings (Hotel and Conference Center) with one LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. certification using two different EnergyStar ratings (one per building)?
Does this fall under a campus approach?
Jalal, I think LEED will see these as two buildings. The best source for understanding this is the LEED Minimum Program Requirements supplemental guidance document (you can easily find it via Google).
Jenny, can you respond to a follow-up on your comment about LEED following Energy Star with respect to a single facility?
Our client performs aviation repair under FAA supervision in a secured three-building facility. We plan to compare site energy for EAp2 with other similar facilities client operates in other states. Plant floor areas in each building is generally 1/3, 1/3, 1/3. Each was built separately on separate, but continguous, legal decriptions many years ago but the three have morphed into one, and each does not have all its own utility services. Other shared components are fenced site, parking, purchasing, operations, HR, etc. It woud be far simpler to aggregate and get one certification than to artificially separate everything for three certifrications. Would "Special Circumstances" on PIf2 be the best place to explain all this?
Jalal - If Energy Star says they are separate buildings, it's pretty much guaranteed that LEED would not let you certify them under a single application under the current rules.
Jim - Sounds like you are in a trickier boat, since the facilities have shared utilities. Check out the MPR Supplemental Guidance, and if there's any doubt about your ability to claim them as a single structure, use 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 get advance clearance: http://www.usgbc.org/ShowFile.aspx?DocumentID=6473
Both of you might find the USGBC Guidance for Multiple Buildings and On-Campus Projects handy: http://www.usgbc.org/DisplayPage.aspx?CMSPageID=2326
In particular, this PDF will give you the low down on certifying buildings as part of a "master site", which is supposed to offer some efficiencies in pursuing certifications for multiple buildings on a campus: https://www.usgbc.org/ShowFile.aspx?DocumentID=7987
Thank you all for the great information.
Now is it possible that we fullfill the requirements for EA PR2 with using Case 2 calculator?
Just a reminder, the site comprised of two buildings (a Hotel and a Conference Center) connected by a tunnel (Personell and Utility). The building has one address, one owner, one utility bills, one chiller plant.
What is the Criteria for this option?
I believe I read somewhere or heard it in the Performance Period webinar that we can use an older energy star score even if it doesnt end within the same 30 day window as the rest of the other credits? Our project recieved a score of 83 in April of this year but we have not yet begun our Performance Period, will I need to re-do the score so it ends within the same 30 days? I also read the shortest the performance period could be is 3 months but the Energy Star requires 12 months of data, how can this be?
I am unaware of any exceptions for past Energy Star scores, all of the language in the reference guide implies data from the actual performance period is needed.
For your second question, all credits have a minimum 3 month performance period, with the exception of EAp2 and EAc1, which has a minimum 12 month performance period. (See bottom of page xix in LEED EB 2009 reference manual.)
Paul, There is one situation under which teams are allowed to use an Energy Star score from a 12-month period that ends before the other performance period dates. This is allows only if a) you have an official Energy Star label that is associated with the score you will be using, AND b) your LEED application is submitted within 12 months of when the official label was issued.
Do you have an official label?
I am working on LEED certifying a high-rise building with a current Energy Star label (current until Mar 2011). They would like a current Energy Star label in 2011 in addition to LEED certification in 2012. I cannot find any LEED documentation of the Energy Star "label" performance period exception Jenny listed above. If the building has an official Energy Star label issued in April 2011, I could use that score for LEED as long as the application is submitted by March 2012?
We are in a similar situation. We have three buildings: two dormitory buildings and one administration building that serves the dormitories. The buildings are separate and completely unconnected. They also each have their own mechanical systems. However, there is only one meter that collects data for all three buildings.
The client has already achieved One EnergyStar label for the three buildings as a whole. In our understanding they should not have been able to do this. Can we proceed with doing LEED EB for the three buildings as a whole using the Energy Star label achieved only a few months ago, or will they have 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. these buildings and achieve Energy Star scores for each one individually?
We are working on a LEED EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. for a small professional office building (3,000 SF) in Honolulu. The Energy Star calculator will not allow us to get a rating because we are less than 5,000 SF total building space. Can we simply double the actual square footage, # of occupants, # of computers etc. to get score from Energy Star to use for EA PR2, Case 2 & EA CR1?
Peter, I've never had this come up before, but my hunch is that you would not be allowed to use Energy Star. It seems more likely that you'd need to follow Case 2, Option 1 and use the offline benchmarking tool. Have you investigated that approach? In any event, since this is an unusual situation you may want to reach out to GBCI directly to verify this tactic.
Thanks for the reply Jenny. It just seems logical (to me anyway!) that we should be able to double the variables and get the same results. That way we could continue to use Energy Star in the future to track our electricity and water usage. In any case, I will follow your advice.
Let me know how it turns out. Though logical, my suspicion is that Energy Star sets the size limits because they think small buildings are fundamentally different than the larger buildings that make up their data set, and therefore they just aren't confident that the benchmarking algorithm applies.
I did hear back from Energy Star and they were not supportive of my plan. Yet they did not really say why the data would be skewed and I can't think of a logical reason why the comparisons would suddenly become invalid for an office building smaller than 5,000 SF. I think I will run some test calculations through Energy Star for buildings that are 5K, 10K and 20K SF where I simply double the annual Btus/SF usage, number of occupants and number of computers. If the energy star rating stays the same, I would think that my theory makes sense. In any case, when I use another baseline calculator like the one on buildingbenchmarks.com I get more LEED points anyway, so I really don't care if I can use the EnergyStar calculator. I also have a question into GBCI on this and will let you know what they say.
I was wondering if someone could clarify something for me. We have a situation where we need 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. our builidng because it currently shares a meter with other buildings. The reference guide says building management can either own the meter or a third party (utility company) can own the meter. However, the LEED online forms require you to upload 3 utility bills to prove the energy data you entered in energy star matches. If you (the building owner) owns the meter how is it possible to get utility bills for it?
In my experience project teams in this situation have been allowed to submit detailed records of consumption based on reads of the 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.. Because this is a prereq and you want to be extra sure that your approach is acceptable, I'd recommend submitting a customer service question once your project is registered to clarify that this approach would be a-okay.
I have a ~500,000 building in NYC. Approximately 150,000 SF of this space is dedicated to a higher education city school. The remaining space split up between a small parking garage on in the basement, office space, and a photo printing center. The photo printing center uses an exorbitant amount of electricity in its printing.
In messing around with Target Finder I found that the range for an ESTAR Score is from 20-30 depending on the space type definitiions. Excluding the printing center and and school, the building is actually rather efficient.
Is there any way that this building could earn LEED EB without any energy efficient upgrades? Looking at the Case 2 calculator, it doesnt seem to give me the any options for the increased EUI use of the printing center. How would i go about doing comparable building benchmarking?
How large is the printing center, in terms of the percent of overall square footage? If it's less than 10% and separately metered, you may be allowed to excluded it from your EBOMEBOM is an acronym for Existing Buildings: Operations & Maintenance, one of the LEED 2009 rating sytems. efforts and energy benchmarking.
The printing center takes up about 20% of the building. I guess i cannot exclude it. If there was no printing center and 35% of the building was a college, would I still have to use the Case 2 calculator? How would you go about finding comparable building energy usage for the benchmarking?
That's right, no exclusions if it's over 10%. Even if it didn't exist, and the split was 35/65 between university and office, you still wouldn't be able to get an Energy Star score and would be in Case 2.
As a Case 2, Option 2 project, you don't necessarily need comparables if you can show a reduction against a historic baseline. Have you investigate that approach?
We are investigating that option right now. We are running into difficulties getting the entire building's energy usage data for the past 6 years. As there are about 20 direct metered electricity accounts throughout the building. We created online accounts for each tenant's energy accounts, however these accounts only have approximately 2 years of usage data. It is also annoying that a few of our tenants have moved in within the past couple years. Will we be able to project their current usage into the historic baseline?
Generally projections are frowned upon, but occasionally in my experience there have been a few situations with extenuating circumstances where it might fly. This would happen through the CIR process for sure (I would not recommend trying this without advance clearance), and would generally entail a very conservative approach for the projections.
Also, to clarify, you wouldn't need 6 complete years, but rather 3 consecutive years within the last 6 (plus the 1 year performance period). So, four years total.
Finally, regarding tenants coming and going, you could potentially normalize for changing occupancy rates or types if you have a good handle when tenants came and went and the spaces they occupied.
If a LEED project consists of two 9-story office towers and a 3-story cafeteria/auditorium (all connected), what is the best approach for meeting Energy Star rating for the 3-story cafeteria/auditorium? Listed as Other, it doesn't achieve minimum Energy Star rating.
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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