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Alternative Performance Rating Method

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Pilot-Credits EApc111: Alternative Performance Rating Method 1-18 points

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Credit language

USGBC logo

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

Intent

To reduce the environmental and economic harms of excessive energy use by achieving a minimum level of energy efficiency for the building and its systems.

Requirements

EA Prerequisite: Minimum Energy Performance
Required And
EA Credit: Optimize Energy Performance
1-18 points for all adaptations, except: Schools (1-16 points), Healthcare (1-20 points), MF Mid-Rise (1-30 points).
EA Prerequisite: Minimum Energy Performance
Whole-Building Energy Simulation
Demonstrate a minimum reduction of 5% for new construction, 3% for major renovations, or 2% for core and shell projects in the proposed building Performance Cost Index (PCI)1 below the Performance Cost Index Target (PCIt) calculated in accordance with Section 4.2.1.1 of ANSI/ASHRAE/IESNA Standard 90.1-2016, Appendix G, with the following exceptions:
  • Table 1 below replaces Table 4.2.1.1.
  • For unfinished spaces or systems, the Appendix G references to ASHRAE 90.1-2016 Section 4 through 10 prescriptive efficiencies shall be replaced with the corresponding ASHRAE 90.1-2010 Section 4 through 10 prescriptive efficiencies.
For mixed use buildings, the required PCI shall be calculated by using an area weighted average of the building types. Projects must meet the minimum PCI before taking credit for renewable energy systems. The proposed design must meet the following criteria:
  • compliance with the mandatory provisions of ANSI/ASHRAE/IESNA Standard 90.1–2010, with errata3
  • inclusion of all energy consumption and costs within and associated with the building project; and
  • comparison against a baseline building that complies with Standard 90.1–2016, Appendix G.
Document the energy modeling input assumptions for unregulated loads. Unregulated loads should be modeled accurately to reflect the actual expected energy consumption of the building. If unregulated loads are not identical for both the baseline and the proposed building performance rating, and the simulation program cannot accurately model the savings, follow the exceptional calculation method (ANSI/ASHRAE/IESNA Standard 90.1–2016, G2.5).

Table 1 – Building Performance Factors (BPFs) for Compliance with Standard 90.1-2010

Rating System Adaptation

Building Performance Factor (BPF)

New Construction (Except High-Rise Residential)

0.72

Retail (Incl. Restaurant)

0.72

School

0.65

Healthcare

0.69

Hospitality

0.76

Warehouse

0.70

Homes Mid-Rise & NC High-Rise Residential

0.89

EA Credit: Optimize Energy Performance


Case 1. LEED v4 Performance Metric: Cost
Projects using the Option 1. Whole-Building Energy Simulation path for EA Credit Optimize Energy Performance:
Comply with all credit requirements, except that the requirement to “Demonstrate a percentage improvement in proposed building performance rating compared with the baseline” shall be replaced with the following requirement:
Demonstrate a percentage reduction in the Performance Cost Index (PCI) below the Performance Cost Index Target (PCIt) calculated in the prerequisite. Points are awarded according to Table 1, as shown in the LEED Rating System language for EA: Optimize Energy Performance.

Case 2. LEED v4.1 Performance Metrics: Cost and GHG Emissions

Projects using the Option 1. Whole-Building Energy Simulation path for EA Credit Optimize Energy Performance: Comply with all credit requirements, except that the requirement to “Demonstrate a percentage improvement in proposed building performance rating compared with the baseline” shall be replaced with the following requirement: Demonstrate a percentage reduction in the Performance Cost Index (PCI) below the Performance Cost Index Target (PCIt) calculated in the prerequisite. Document the PCI, PCIt, and percentage improvement using metrics of cost and greenhouse gas (GHG) emissions.
  • Greenhouse gas emissions: The total greenhouse gas emissions, in terms of carbon dioxide equivalents, shall be calculated for the baseline building performance rating and for the proposed building performance rating, and the percentage improvement shall be determined using carbon dioxide equivalent emissions. US and Canada:
    • use U.S. Environmental Protection Agency’s (EPA) regional grid mix coefficients to calculate GHG emissions by energy source; or
    • use hourly emissions profiles from U.S. Environmental Protection Agency’s (EPA) AVoided Emissions and geneRation Tool (AVERT)
    • International:
    • use national grid mix coefficients from the International Energy Agency CO2 Emissions from Fuel Combustion 2017 report to calculate GHG emissions by energy source
    • ISO 52000-1:2017: Greenhouse gas emission factors for each building energy source shall be determined consistently with ISO Standard 52000-1:2017 and published for the country or region where the project is located

Points are awarded according to Table 2 and Table 3, below.

For project percent improvement for the cost metric, on-site renewable energy may be subtracted from proposed greenhouse gas emissions prior to calculating proposed building performance per ASHRAE Standard 90.1-2016 Section G 2.4.1.

Table 2. Points for percentage improvement in energy performance – % Cost PCI below PCIt (1-9 points NC and CS, 1-8 points Schools, 1-10 points Healthcare)
BD+C except Healthcare, CS Major Renovation Healthcare CS MF Midrise Points BD+C Points Healthcare Points MF Midrise
8% 6% 6% 5% 7% 1 1 1
12% 10% 8% 9% 9% 2 2 2
16% 14% 12% 13% 11% 3 3 3
20% 18% 16% 17% 13% 4 4 4
24% 22% 20% 21% 15% 5 5 5
29% 27% 24% 26% 17% 6 6 6
35% 33% 29% 32% 19% 7 7 7
42% 40% 35% 39% 22% 8 8 8
50% 48% 42% 47% 26% 9 9 9
54% 54% 50% 54% 30% EP 10 10
54% 36% EP 11
42% 12
48% 13
54% 14
60% 15
65% EP
NC, WDC, Hospitality, and Retail projects with process costs exceeding 50% of the proposed energy cost (excluding renewable savings) may use the CS thresholds per LI 10493.
*Colocation data centers projects using the BD+C: Data center rating system may use CS thresholds in lieu of NC thresholds per LI 10494.

On-site renewable energy may be subtracted from proposed greenhouse gas emissions prior to calculating proposed building performance per ASHRAE Standard 90.1-2016 Section G 2.4.1. Offsite renewable energy as defined in LEED v4.1 EA credit Renewable Energy may be excluded from proposed greenhouse gas emissions consistent with the methodology identified in LEED v4.1 EA credit Renewable Energy.

Table 3. Points for percentage improvement in energy performance – % GHG Emissions PCI below PCIt (1-9 points NC and CS, 1-8 points Schools, 1-10 points Healthcare)
BD+C except Healthcare, CS Major Renovation Healthcare CS MF Midrise Points BD+C Points Healthcare Points MF Midrise
8% 6% 6% 5% 7% 1 1 1
12% 10% 8% 9% 9% 2 2 2
17% 15% 12% 13% 11% 3 3 3
22% 20% 17% 18% 13% 4 4 4
28% 25% 22% 22% 16% 5 5 5
34% 32% 28% 28% 19% 6 6 6
40% 36% 34% 34% 21% 7 7 7
50% 46% 40% 40% 25% 8 8 8
65% 60% 50% 50% 30% 9 9 9
80% 75% 65% 65% 35% EP 10 10
80% 40% EP 11
45% 12
50% 13
65% 14
80% 15
100% EP
NC, WDC, Hospitality, and Retail projects with process costs exceeding 50% of the proposed energy cost (excluding renewable savings) may use the CS thresholds per LI 10493.

*Colocation data centers projects using the BD+C: Data center rating system may use CS thresholds in lieu of NC thresholds per LI 10494.

1 A PCI of 1.0 is approximately equal to the energy cost performance of a building constructed to Standard 90.1-2004. A PCI of 0 is a zero energy cost building. 2 Available as individual addenda for free at: https://ashrae.org/File%20Library/docLib/StdsAddenda/2015_Supplement_to_... or compiled as a stand-alone version of Appendix G for sale at http://www.techstreet.com/ashrae/products/1907683 3 All references within ASHRAE 90.1-2016 Section G1.2.1 shall be considered to be referring to ASHRAE 90.1-2010 for the purposes of this Alternative compliance Path. Compliance with ASHRAE 90.1-2016 Mandatory Provisions are not required; instead, ASHRAE 90.1-2010 mandatory provisions apply.

Submittals

General
Register for the pilot credit Credits 106-115

Credit Specific Documentation

In addition to the standard documentation for this prerequisite, provide the following additional documentation:
  • The LEED v4.1 Minimum Energy Performance Calculator.
  • Identification of the performance metric used to document compliance (Case 1 – Cost, or Case 2 (Cost and Greenhouse Gas Emissions)
  • Case 2 only: Greenhouse gas emissions calculations, including emissions factors used
Changes
  • 4/10/20 - updated to:
    • Incorporate Case 1 and Case 2 (dual metric)
    • Add Table 2. Points for percentage improvement in energy performance – % Cost PCI below PCIt
    • Add Table 3. Points for percentage improvement in energy performance – % GHG Emissions PCI below PCIt
    • Update required documentation
  • 11/14/2019 - updated calculator and references to refer to v4.1 calculator version.
See all forum discussions about this credit »

What does it cost?

Cost estimates for this credit

On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.

Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.

This information is also available in a full PDF download in The Cost of LEED v4 report.

Learn more about The Cost of LEED v4 »

Documentation toolkit

The motherlode of cheat sheets

LEEDuser’s Documentation Toolkit is loaded with calculators to help assess credit compliance, tracking spreadsheets for materials, sample templates to help guide your narratives and LEED Online submissions, and examples of actual submissions from certified LEED projects for you to check your work against. To get your plaque, start with the right toolkit.

USGBC logo

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

Intent

To reduce the environmental and economic harms of excessive energy use by achieving a minimum level of energy efficiency for the building and its systems.

Requirements

EA Prerequisite: Minimum Energy Performance
Required And
EA Credit: Optimize Energy Performance
1-18 points for all adaptations, except: Schools (1-16 points), Healthcare (1-20 points), MF Mid-Rise (1-30 points).
EA Prerequisite: Minimum Energy Performance
Whole-Building Energy Simulation
Demonstrate a minimum reduction of 5% for new construction, 3% for major renovations, or 2% for core and shell projects in the proposed building Performance Cost Index (PCI)1 below the Performance Cost Index Target (PCIt) calculated in accordance with Section 4.2.1.1 of ANSI/ASHRAE/IESNA Standard 90.1-2016, Appendix G, with the following exceptions:
  • Table 1 below replaces Table 4.2.1.1.
  • For unfinished spaces or systems, the Appendix G references to ASHRAE 90.1-2016 Section 4 through 10 prescriptive efficiencies shall be replaced with the corresponding ASHRAE 90.1-2010 Section 4 through 10 prescriptive efficiencies.
For mixed use buildings, the required PCI shall be calculated by using an area weighted average of the building types. Projects must meet the minimum PCI before taking credit for renewable energy systems. The proposed design must meet the following criteria:
  • compliance with the mandatory provisions of ANSI/ASHRAE/IESNA Standard 90.1–2010, with errata3
  • inclusion of all energy consumption and costs within and associated with the building project; and
  • comparison against a baseline building that complies with Standard 90.1–2016, Appendix G.
Document the energy modeling input assumptions for unregulated loads. Unregulated loads should be modeled accurately to reflect the actual expected energy consumption of the building. If unregulated loads are not identical for both the baseline and the proposed building performance rating, and the simulation program cannot accurately model the savings, follow the exceptional calculation method (ANSI/ASHRAE/IESNA Standard 90.1–2016, G2.5).

Table 1 – Building Performance Factors (BPFs) for Compliance with Standard 90.1-2010

Rating System Adaptation

Building Performance Factor (BPF)

New Construction (Except High-Rise Residential)

0.72

Retail (Incl. Restaurant)

0.72

School

0.65

Healthcare

0.69

Hospitality

0.76

Warehouse

0.70

Homes Mid-Rise & NC High-Rise Residential

0.89

EA Credit: Optimize Energy Performance


Case 1. LEED v4 Performance Metric: Cost
Projects using the Option 1. Whole-Building Energy Simulation path for EA Credit Optimize Energy Performance:
Comply with all credit requirements, except that the requirement to “Demonstrate a percentage improvement in proposed building performance rating compared with the baseline” shall be replaced with the following requirement:
Demonstrate a percentage reduction in the Performance Cost Index (PCI) below the Performance Cost Index Target (PCIt) calculated in the prerequisite. Points are awarded according to Table 1, as shown in the LEED Rating System language for EA: Optimize Energy Performance.

Case 2. LEED v4.1 Performance Metrics: Cost and GHG Emissions

Projects using the Option 1. Whole-Building Energy Simulation path for EA Credit Optimize Energy Performance: Comply with all credit requirements, except that the requirement to “Demonstrate a percentage improvement in proposed building performance rating compared with the baseline” shall be replaced with the following requirement: Demonstrate a percentage reduction in the Performance Cost Index (PCI) below the Performance Cost Index Target (PCIt) calculated in the prerequisite. Document the PCI, PCIt, and percentage improvement using metrics of cost and greenhouse gas (GHG) emissions.
  • Greenhouse gas emissions: The total greenhouse gas emissions, in terms of carbon dioxide equivalents, shall be calculated for the baseline building performance rating and for the proposed building performance rating, and the percentage improvement shall be determined using carbon dioxide equivalent emissions. US and Canada:
    • use U.S. Environmental Protection Agency’s (EPA) regional grid mix coefficients to calculate GHG emissions by energy source; or
    • use hourly emissions profiles from U.S. Environmental Protection Agency’s (EPA) AVoided Emissions and geneRation Tool (AVERT)
    • International:
    • use national grid mix coefficients from the International Energy Agency CO2 Emissions from Fuel Combustion 2017 report to calculate GHG emissions by energy source
    • ISO 52000-1:2017: Greenhouse gas emission factors for each building energy source shall be determined consistently with ISO Standard 52000-1:2017 and published for the country or region where the project is located

Points are awarded according to Table 2 and Table 3, below.

For project percent improvement for the cost metric, on-site renewable energy may be subtracted from proposed greenhouse gas emissions prior to calculating proposed building performance per ASHRAE Standard 90.1-2016 Section G 2.4.1.

Table 2. Points for percentage improvement in energy performance – % Cost PCI below PCIt (1-9 points NC and CS, 1-8 points Schools, 1-10 points Healthcare)
BD+C except Healthcare, CS Major Renovation Healthcare CS MF Midrise Points BD+C Points Healthcare Points MF Midrise
8% 6% 6% 5% 7% 1 1 1
12% 10% 8% 9% 9% 2 2 2
16% 14% 12% 13% 11% 3 3 3
20% 18% 16% 17% 13% 4 4 4
24% 22% 20% 21% 15% 5 5 5
29% 27% 24% 26% 17% 6 6 6
35% 33% 29% 32% 19% 7 7 7
42% 40% 35% 39% 22% 8 8 8
50% 48% 42% 47% 26% 9 9 9
54% 54% 50% 54% 30% EP 10 10
54% 36% EP 11
42% 12
48% 13
54% 14
60% 15
65% EP
NC, WDC, Hospitality, and Retail projects with process costs exceeding 50% of the proposed energy cost (excluding renewable savings) may use the CS thresholds per LI 10493.
*Colocation data centers projects using the BD+C: Data center rating system may use CS thresholds in lieu of NC thresholds per LI 10494.

On-site renewable energy may be subtracted from proposed greenhouse gas emissions prior to calculating proposed building performance per ASHRAE Standard 90.1-2016 Section G 2.4.1. Offsite renewable energy as defined in LEED v4.1 EA credit Renewable Energy may be excluded from proposed greenhouse gas emissions consistent with the methodology identified in LEED v4.1 EA credit Renewable Energy.

Table 3. Points for percentage improvement in energy performance – % GHG Emissions PCI below PCIt (1-9 points NC and CS, 1-8 points Schools, 1-10 points Healthcare)
BD+C except Healthcare, CS Major Renovation Healthcare CS MF Midrise Points BD+C Points Healthcare Points MF Midrise
8% 6% 6% 5% 7% 1 1 1
12% 10% 8% 9% 9% 2 2 2
17% 15% 12% 13% 11% 3 3 3
22% 20% 17% 18% 13% 4 4 4
28% 25% 22% 22% 16% 5 5 5
34% 32% 28% 28% 19% 6 6 6
40% 36% 34% 34% 21% 7 7 7
50% 46% 40% 40% 25% 8 8 8
65% 60% 50% 50% 30% 9 9 9
80% 75% 65% 65% 35% EP 10 10
80% 40% EP 11
45% 12
50% 13
65% 14
80% 15
100% EP
NC, WDC, Hospitality, and Retail projects with process costs exceeding 50% of the proposed energy cost (excluding renewable savings) may use the CS thresholds per LI 10493.

*Colocation data centers projects using the BD+C: Data center rating system may use CS thresholds in lieu of NC thresholds per LI 10494.

1 A PCI of 1.0 is approximately equal to the energy cost performance of a building constructed to Standard 90.1-2004. A PCI of 0 is a zero energy cost building. 2 Available as individual addenda for free at: https://ashrae.org/File%20Library/docLib/StdsAddenda/2015_Supplement_to_... or compiled as a stand-alone version of Appendix G for sale at http://www.techstreet.com/ashrae/products/1907683 3 All references within ASHRAE 90.1-2016 Section G1.2.1 shall be considered to be referring to ASHRAE 90.1-2010 for the purposes of this Alternative compliance Path. Compliance with ASHRAE 90.1-2016 Mandatory Provisions are not required; instead, ASHRAE 90.1-2010 mandatory provisions apply.

Submittals

General
Register for the pilot credit Credits 106-115

Credit Specific Documentation

In addition to the standard documentation for this prerequisite, provide the following additional documentation:
  • The LEED v4.1 Minimum Energy Performance Calculator.
  • Identification of the performance metric used to document compliance (Case 1 – Cost, or Case 2 (Cost and Greenhouse Gas Emissions)
  • Case 2 only: Greenhouse gas emissions calculations, including emissions factors used
Changes
  • 4/10/20 - updated to:
    • Incorporate Case 1 and Case 2 (dual metric)
    • Add Table 2. Points for percentage improvement in energy performance – % Cost PCI below PCIt
    • Add Table 3. Points for percentage improvement in energy performance – % GHG Emissions PCI below PCIt
    • Update required documentation
  • 11/14/2019 - updated calculator and references to refer to v4.1 calculator version.
See all LEEDuser forum discussions about this credit » Subscribe to new discussions about Pilot-Credits EApc111