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LEED v2009
Core & Shell
Energy and Atmosphere
Minimum Energy Performance

LEED CREDIT

CS-2009 EAp2: Minimum Energy Performance Required

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Marcus Sheffer

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LEED Fellow

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© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To establish the minimum level of energy efficiency for the proposed building and systems to reduce environmental and economic impacts associated with excessive energy use.

Requirements

Projects that register on or after April 8, 2016 and are subject to the four point mandatory minimum, demonstrate a 14% improvement for new buildings, or a 10% improvement for major renovations to existing buildings.
Option 1. Whole building energy simulation

Demonstrate a 10% improvement in the proposed building performance rating for new buildings, or a 5% improvement in the proposed building performance rating for major renovations to existing buildings, compared with the baseline building performance rating.

Calculate the baseline building performance rating according to the building performance rating method in Appendix G of ANSI/ASHRAE/IESNA Standard 90.1-2007 (with errata but without addenda1) using a computer simulation model for the whole building project. Projects outside the U.S. may use a USGBC approved equivalent standard2.

Appendix G of Standard 90.1-2007 requires that the energy analysis done for the building performance rating method include all energy costs associated with the building project. To achieve points using this credit, the proposed design must meet the following criteria:

  • Comply with the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4, 9.4 and 10.4) in Standard 90.1-2007 (with errata but without addenda1) or USGBC approved equivalent.
  • Inclusion of all the energy costs within and associated with the building project.
  • Compare against a baseline building that complies with Appendix G of Standard 90.1-2007 (with errata but without addenda1) or USGBC approved equivalent. The default process energy cost is 25% of the total energy cost for the baseline building. If the building’s process energy cost is less than 25% of the baseline building energy cost, the LEED submittal must include documentation substantiating that process energy inputs are appropriate.

For the purpose of this analysis, process energy is considered to include, but is not limited to, office and general miscellaneous equipment, computers, elevators and escalators,kitchen cooking and refrigeration, laundry washing and drying, lighting exempt from the lighting power allowance (e.g., lighting integral to medical equipment) and other (e.g., waterfall pumps).

Regulated (non-process) energy includes lighting (for the interior, parking garage, surface parking, façade, or building grounds, etc. except as noted above), heating, ventilation and air conditioning (HVAC) (for space heating, space cooling, fans, pumps, toilet exhaust, parking garage ventilation, kitchen hood exhaust, etc.), and service water heating for domestic or space heating purposes.

Process loads must be identical for both the baseline building performance rating and the proposed building performance rating. However, project teams may follow the exceptional calculation method (ANSI/ASHRAE/IESNA Standard 90.1-2007 G2.5) or USGBC approved equivalent to document measures that reduce process loads. Documentation of process load energy savings must include a list of the assumptions made for both the base and the proposed design, and theoretical or empirical information supporting these assumptions.

Projects in California may use Title 24-2005, Part 6 in place of ANSI/ASHRAE/IESNA Standard 90.1-2007 for Option 1.

OR

Option 2 is not an eligible compliance option for projects that registered on or after April 8, 2016.
Option 2. Prescriptive compliance path: ASHRAE Advanced Energy Design Guide

Comply with the prescriptive measures of the ASHRAE Advanced Energy Design Guide appropriate to the project scope, outlined below. Project teams must comply with all applicable criteria as established in the Advanced Energy Design Guide for the climate zone in which the building is located. Projects outside the U.S. may use ASHRAE/ASHRAE/IESNA Standard 90.1-2007 Appendices B and D to determine the appropriate climate zone.

Path 1. ASHRAE Advanced Energy Design Guide for Small Office Buildings 2004

The building must meet the following requirements:

  • Less than 20,000 square feet (1,800 square meters).
  • Office occupancy.
Path 2. ASHRAE Advanced Energy Design Guide for Small Retail Buildings 2006

The building must meet the following requirements:

  • Less than 20,000 square feet (1,800 square meters).
  • Retail occupancy.
Path 3. ASHRAE Advanced Energy Design Guide for Small Warehouses and Self Storage Buildings 2008

The building must meet the following requirements:

  • Less than 50,000 square feet (4,600 square meters).
  • Warehouse or self-storage occupancy.

OR

Option 3 is not an eligible compliance option for projects that registered on or after April 8, 2016.
Option 3. Prescriptive compliance path: Advanced Buildings™ Core Performance™ Guide

Comply with the prescriptive measures identified in the Advanced Buildings™ Core Performance™ Guide developed by the New Buildings Institute. The building must meet the following requirements:

  • Less than 100,000 square feet (9,300 square meters).
  • Comply with Section 1: Design Process Strategies, and Section 2: Core Performance Requirements.
  • Health care, warehouse and laboratory projects are ineligible for this path.

Projects outside the U.S. may use ASHRAE/ASHRAE/IESNA Standard 90.1-2007 Appendices B and D to determine the appropriate climate zone.

OR

Option 4. Brazil compliance path: PBE Edifica

Projects in Brazil that are certified at the “A” level under the Regulation for Energy Efficiency Labeling (PBE Edifica) program for all attributes (Envelope, Lighting, HVAC) achieve this prerequisite. The following building types cannot achieve this prerequisite using this option: Healthcare, Data Centers, Manufacturing Facilities, Warehouses, and Laboratories.

1Project teams wishing to use ASHRAE approved addenda for the purposes of this prerequisite may do so at their discretion. Addenda must be applied consistently across all LEED credits.

2 Projects outside the U.S. may use an alternative standard to ANSI/ASHRAE/IESNA Standard 90.1-2007 if it is approved by USGBC as an equivalent standard using the process identified in the LEED 2009 Green Building Design and Construction Global ACP Reference Guide Supplement.

Pilot ACPs Available

The following pilot alternative compliance path is available for this prerequisite. See the pilot credit library for more information.

EApc95: Alternative Energy Performance Metric ACP

See all forum discussions about this credit »

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Cost estimates for this credit

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Frequently asked questions

Do hotel rooms need automatic light shut-off control?

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How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?

The answer to this question is available to LEEDuser premium members. Start a free trial »

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The Section 9 space-by-space method does not include residential space types. What should I use?

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Can the Passive House Planning Package (PHPP) be used to energy model for LEED?

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Is it acceptable to model a split-type AC with inverter technology compressor as a heat pump, like modeling VRF?

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Can the Trace 700 'LEED Energy Performance Summary Report' by uploaded to LEED Online in lieu of the Section 1.4 tables spreadsheet?

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A portion of our building envelope is historic. Can we exclude it from our model?

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Which baseline HVAC system do I use if my building has no heating or air conditioning?

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For an existing building, do I need to rotate the model?

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Our project has a diesel backup generator. Should we include it in our energy model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

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Our project has a large process load—75%. Despite our efforts to make an efficient HVAC design, the cost savings are minimal. What can we do to earn this prerequisite and be eligible for LEED certification? Is there any flexibility in how we model the process load?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Can SHGC be higher in the proposed than in the baseline model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

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Our process load is higher than 25%. Do we have to justify that?

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Do I need to justify the electrical and fuel rates I am using in my model?

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Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Can I claim exterior lighting savings for canopy lighting even though a baseline model cannot include shading elements?

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The project is built on a site with existing exterior lighting installed. How should this be accounted for?

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Can mezzanines open to floors below be excluded from the energy model?

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How do I provide a zip code for an international location?

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For a project outside the U.S., how do I determine the climate zone?

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For a project outside the U.S., how do I determine the Target Finder score?

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Credit achievement rate

XX%

Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »

LEEDuser expert

Marcus Sheffer

7group / Energy Opportunities
LEED Fellow

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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To establish the minimum level of energy efficiency for the proposed building and systems to reduce environmental and economic impacts associated with excessive energy use.

Requirements

Projects that register on or after April 8, 2016 and are subject to the four point mandatory minimum, demonstrate a 14% improvement for new buildings, or a 10% improvement for major renovations to existing buildings.
Option 1. Whole building energy simulation

Demonstrate a 10% improvement in the proposed building performance rating for new buildings, or a 5% improvement in the proposed building performance rating for major renovations to existing buildings, compared with the baseline building performance rating.

Calculate the baseline building performance rating according to the building performance rating method in Appendix G of ANSI/ASHRAE/IESNA Standard 90.1-2007 (with errata but without addenda1) using a computer simulation model for the whole building project. Projects outside the U.S. may use a USGBC approved equivalent standard2.

Appendix G of Standard 90.1-2007 requires that the energy analysis done for the building performance rating method include all energy costs associated with the building project. To achieve points using this credit, the proposed design must meet the following criteria:

  • Comply with the mandatory provisions (Sections 5.4, 6.4, 7.4, 8.4, 9.4 and 10.4) in Standard 90.1-2007 (with errata but without addenda1) or USGBC approved equivalent.
  • Inclusion of all the energy costs within and associated with the building project.
  • Compare against a baseline building that complies with Appendix G of Standard 90.1-2007 (with errata but without addenda1) or USGBC approved equivalent. The default process energy cost is 25% of the total energy cost for the baseline building. If the building’s process energy cost is less than 25% of the baseline building energy cost, the LEED submittal must include documentation substantiating that process energy inputs are appropriate.

For the purpose of this analysis, process energy is considered to include, but is not limited to, office and general miscellaneous equipment, computers, elevators and escalators,kitchen cooking and refrigeration, laundry washing and drying, lighting exempt from the lighting power allowance (e.g., lighting integral to medical equipment) and other (e.g., waterfall pumps).

Regulated (non-process) energy includes lighting (for the interior, parking garage, surface parking, façade, or building grounds, etc. except as noted above), heating, ventilation and air conditioning (HVAC) (for space heating, space cooling, fans, pumps, toilet exhaust, parking garage ventilation, kitchen hood exhaust, etc.), and service water heating for domestic or space heating purposes.

Process loads must be identical for both the baseline building performance rating and the proposed building performance rating. However, project teams may follow the exceptional calculation method (ANSI/ASHRAE/IESNA Standard 90.1-2007 G2.5) or USGBC approved equivalent to document measures that reduce process loads. Documentation of process load energy savings must include a list of the assumptions made for both the base and the proposed design, and theoretical or empirical information supporting these assumptions.

Projects in California may use Title 24-2005, Part 6 in place of ANSI/ASHRAE/IESNA Standard 90.1-2007 for Option 1.

OR

Option 2 is not an eligible compliance option for projects that registered on or after April 8, 2016.
Option 2. Prescriptive compliance path: ASHRAE Advanced Energy Design Guide

Comply with the prescriptive measures of the ASHRAE Advanced Energy Design Guide appropriate to the project scope, outlined below. Project teams must comply with all applicable criteria as established in the Advanced Energy Design Guide for the climate zone in which the building is located. Projects outside the U.S. may use ASHRAE/ASHRAE/IESNA Standard 90.1-2007 Appendices B and D to determine the appropriate climate zone.

Path 1. ASHRAE Advanced Energy Design Guide for Small Office Buildings 2004

The building must meet the following requirements:

  • Less than 20,000 square feet (1,800 square meters).
  • Office occupancy.
Path 2. ASHRAE Advanced Energy Design Guide for Small Retail Buildings 2006

The building must meet the following requirements:

  • Less than 20,000 square feet (1,800 square meters).
  • Retail occupancy.
Path 3. ASHRAE Advanced Energy Design Guide for Small Warehouses and Self Storage Buildings 2008

The building must meet the following requirements:

  • Less than 50,000 square feet (4,600 square meters).
  • Warehouse or self-storage occupancy.

OR

Option 3 is not an eligible compliance option for projects that registered on or after April 8, 2016.
Option 3. Prescriptive compliance path: Advanced Buildings™ Core Performance™ Guide

Comply with the prescriptive measures identified in the Advanced Buildings™ Core Performance™ Guide developed by the New Buildings Institute. The building must meet the following requirements:

  • Less than 100,000 square feet (9,300 square meters).
  • Comply with Section 1: Design Process Strategies, and Section 2: Core Performance Requirements.
  • Health care, warehouse and laboratory projects are ineligible for this path.

Projects outside the U.S. may use ASHRAE/ASHRAE/IESNA Standard 90.1-2007 Appendices B and D to determine the appropriate climate zone.

OR

Option 4. Brazil compliance path: PBE Edifica

Projects in Brazil that are certified at the “A” level under the Regulation for Energy Efficiency Labeling (PBE Edifica) program for all attributes (Envelope, Lighting, HVAC) achieve this prerequisite. The following building types cannot achieve this prerequisite using this option: Healthcare, Data Centers, Manufacturing Facilities, Warehouses, and Laboratories.

1Project teams wishing to use ASHRAE approved addenda for the purposes of this prerequisite may do so at their discretion. Addenda must be applied consistently across all LEED credits.

2 Projects outside the U.S. may use an alternative standard to ANSI/ASHRAE/IESNA Standard 90.1-2007 if it is approved by USGBC as an equivalent standard using the process identified in the LEED 2009 Green Building Design and Construction Global ACP Reference Guide Supplement.

Pilot ACPs Available

The following pilot alternative compliance path is available for this prerequisite. See the pilot credit library for more information.

EApc95: Alternative Energy Performance Metric ACP

XX%

Upgrade to LEEDuser Premium to see how many projects achieved this credit. Try it free »

Got the gist of EAp2 but not sure how to actually achieve it? LEEDuser gives step-by-step help. Premium members get:

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In the end, LEED is all about documentation. LEEDuser’s Documentation Toolkit, for premium members only, saves you time and helps you avoid mistakes with:

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  • Spreadsheets and forms to give to subs and other team members.
  • Guidance documents on arcane LEED issues.
  • Sample templates to help guide your narratives and LEED Online submissions.
  • Examples of actual submissions from certified LEED projects.

Do hotel rooms need automatic light shut-off control?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

The Section 9 space-by-space method does not include residential space types. What should I use?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Can the Passive House Planning Package (PHPP) be used to energy model for LEED?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Is it acceptable to model a split-type AC with inverter technology compressor as a heat pump, like modeling VRF?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Can the Trace 700 'LEED Energy Performance Summary Report' by uploaded to LEED Online in lieu of the Section 1.4 tables spreadsheet?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

A portion of our building envelope is historic. Can we exclude it from our model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Which baseline HVAC system do I use if my building has no heating or air conditioning?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

For an existing building, do I need to rotate the model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Our project has a diesel backup generator. Should we include it in our energy model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Our project has a large process load—75%. Despite our efforts to make an efficient HVAC design, the cost savings are minimal. What can we do to earn this prerequisite and be eligible for LEED certification? Is there any flexibility in how we model the process load?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Can SHGC be higher in the proposed than in the baseline model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Our process load is higher than 25%. Do we have to justify that?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Do I need to justify the electrical and fuel rates I am using in my model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Can I claim exterior lighting savings for canopy lighting even though a baseline model cannot include shading elements?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

The project is built on a site with existing exterior lighting installed. How should this be accounted for?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

Can mezzanines open to floors below be excluded from the energy model?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

How do I provide a zip code for an international location?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

For a project outside the U.S., how do I determine the climate zone?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

For a project outside the U.S., how do I determine the Target Finder score?

The answer to this question is available to LEEDuser premium members. Start a free trial »

(If you're already a premium member, log in here.)

LEEDuser expert

Marcus Sheffer

7group / Energy Opportunities
LEED Fellow

See all LEEDuser forum discussions about this credit » Subscribe to new discussions about CS-2009 EAp2