Addenda & FAQ
2020 Criteria Addenda & FAQ will be posted here as these are developed.
As the Atlantic hurricane season approaches, we are focused on strategies that reduce risks for people and buildings associated with hurricanes, severe storms, and other wind events. The Insurance Institute for Business & Home Safety’s FORTIFIED program is incorporated into the criteria as a resource to support project teams when considering preliminary climate hazards as part of the Project Priorities Survey. FORTIFIED is a beyond-code construction and re-roofing standard designed to strengthen homes and commercial buildings against high winds, hail, hurricanes and even tornados, with a verification process that gives property owners and their insurers confidence that a FORTIFIED designation represents reduced risk. https://ibhs.org/fortified/.
As the Atlantic hurricane season approaches, we are focused on strategies that reduce risks for people and buildings associated with hurricanes, severe storms, and other wind events. The Insurance Institute for Business & Home Safety’s FORTIFIED program is incorporated into the criteria as a resource to support project teams as they consider solutions to known project vulnerabilities as part of the Multi-Hazard Risk/Vulnerability Assessment. FORTIFIED is a beyond-code construction and re-roofing standard designed to strengthen homes and commercial buildings against high winds, hail, hurricanes and even tornados, with a verification process that gives property owners and their insurers confidence that a FORTIFIED designation represents reduced risk. https://ibhs.org/fortified/.
Q: How should a project team determine if a site includes prime farmland per the USDA?
A: Teams should use the USDA Web Soil Survey Tool by going to: https://websoilsurvey.nrcs.usda.gov/app/websoilsurvey.aspx
Once one this page, follow these steps:
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Enter the project address & select the AOI box from the ribbon at the top of the map;
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Use the AOI box tool to create an area of interest around the site.
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Navigate to the soil data explorer tab.
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Navigate to the land classification drop down & select farmland classification → select view rating.
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Scroll to bottom of page and view the farmland designation.
In light of the Covid-19 pandemic, in which virtual connectivity, remote schooling, access to tele-medicine and other critical web-based resources is essential, we are expanding the availability of this optional criterion. All projects, regardless of location or construction type, may now choose to pursue Criterion 2.15b for six optional points.
The Energy Rating Index (ERI) pathway is one of the options available to demonstrate compliance with mandatory 2020 Criteria criterion 5.1b for rehab projects and to achieve optional points through criterion 5.2a.
At the time of publication of the 2020 Criteria, RESNET’s HERS Index was the only compliant ERI option via methodology approved by an EPA-approved Verification Oversight Organization (VOO).
Since the time of 2020 Criteria publication, EPA has transitioned from VOOs to Home Certification Organizations (HCOs) for implementation of the ENERGY STAR certification program based on the ENERGY STAR Residential New Construction program requirements for site-built single-family and multifamily homes and apartments when an ERI or dwelling unit modeling compliance path is used. EPA has also expanded the list of EPA-recognized HCOs for such programs.
Consistent with these updates and all future expansions of EPA-recognized HCO’s, any reference to “HERS Index” within the 2020 Enterprise Green Communities Criteria is amended to refer to any ERI methodology approved by an EPA-recognized HCO.
The ERI value shall be calculated using ANSI / RESNET / ICC 301 including all Addenda and Normative Appendices, with new versions and Addenda implemented according to the schedule defined by the Home Certification Organization (HCO) that the home is being certified under, with approved exceptions listed at www.energystar.gov/ERIExceptions [energystar.gov].
This addendum applies to the Compartmentalization requirement for Moderate Rehab properties. For each dwelling unit in these properties, projects may choose to either meet the .40 CFM50/sfbe compartmentalization target or a 20% improvement of CFM50/sfbe compared to pre-retrofit condition. For projects with more than one dwelling unit, a combination of these targets may be used at the project team’s discretion (some dwelling units complying with the .40 CFM50/sfbe target and others complying with 20% improvement target).
Substantial or Moderate Rehab properties in Colorado in Climate Zone 5 may choose to use an alternate path instead of mandatory 2020 Criterion 5.1b. This existing building Colorado alternate energy path is administered by Energy Outreach Colorado ; please refer to the linked requirements.
To demonstrate compliance with this alternate path for Enterprise Green Communities Certification, at Prebuild project teams will upload a confirmation letter to the Enterprise certification portal from EOC showing that the project has appropriately committed to the Colorado alternate path. At Postbuild, project teams will upload a confirmation letter to the Enterprise certification portal from EOC confirming that the project successfully complied.
The Energy Rating Index (ERI) pathway is one of the options available to demonstrate compliance with mandatory 2020 Criteria criterion 5.1b for rehab projects and to achieve optional points through criterion 5.2a.
At the time of publication of the 2020 Criteria, RESNET’s HERS Index was the only compliant ERI option via methodology approved by an EPA-approved Verification Oversight Organization (VOO).
Since the time of 2020 Criteria publication, EPA has transitioned from VOOs to Home Certification Organizations (HCOs) for implementation of the ENERGY STAR certification program based on the ENERGY STAR Residential New Construction program requirements for site-built single-family and multifamily homes and apartments when an ERI or dwelling unit modeling compliance path is used. EPA has also expanded the list of EPA-recognized HCOs for such programs.
Consistent with these updates and all future expansions of EPA-recognized HCO’s, any reference to “HERS Index” within the 2020 Enterprise Green Communities Criteria is amended to refer to any ERI methodology approved by an EPA-recognized HCO.
The ERI value shall be calculated using ANSI / RESNET / ICC 301 including all Addenda and Normative Appendices, with new versions and Addenda implemented according to the schedule defined by the Home Certification Organization (HCO) that the home is being certified under, with approved exceptions listed at www.energystar.gov/ERIExceptions [energystar.gov].
As an alternative to either achieving DOE ZERH certification (12 points) or PHI Classic or PHIUS certification (15 points), existing buildings that demonstrate achievement of the following requirements will be considered compliant with Criterion 5.2b and receive Enterprise Green Communities Certification Plus earning 12 points.
If the project is a tenant-in-place rehabilitation, the project must demonstrate:
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At least 30% reduction of site energy use compared to pre-rehab condition.
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Compliance with Criterion 5.3a: Moving to Zero Energy: Photovoltaic / Solar Hot Water Ready OR Criterion 5.3b: Moving to Zero Energy: Renewable Energy [at least achieve minimum points available with this criterion].
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Compliance with Criterion 5.5b: Moving to Zero Carbon: All Electric.
If the project is not a tenant-in-place rehabilitation, the project must demonstrate:
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At least 40% reduction of site energy use compared to pre-rehab condition.
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Compliance with Criterion 5.3a: Moving to Zero Energy: Photovoltaic / Solar Hot Water Ready OR Criterion 5.3b: Moving to Zero Energy: Renewable Energy [at least achieve minimum points available with this criterion].
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Compliance with Criterion 5.5b: Moving to Zero Carbon: All Electric.
Certification Process:
Prebuild Documentation:
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The intent at Prebuild is to show readiness for achieving the 5.1b minimum requirements and the more rigorous performance standard of this approach within 5.2b. This may be demonstrated in one of two ways:
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If following the ASHRAE Option: submit the 5.2b Certification Plus for Existing Buildings Template - ASHRAE Option, demonstrating that the savings requirement will be achieved.
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If following the ERI Option: submit the 5.2b Certification Plus for Existing Buildings Template – ERI Option, demonstrating that the savings requirement will be achieved. Also submit the projected ERI ratings certificates.
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For both the ASHRAE Option and ERI Option, ensure that the existing and projected EUI and emissions for the building(s) are calculated on the Overview Tab of the appropriate 5.2b template. Also input these values in the specified fields of the Criteria Compliance section of the project’s Prebuild certification application.
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Comply with either Criterion 5.3a or Criterion 5.3b.
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Comply with Criterion 5.5b.
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If the project is a tenant-in-place rehabilitation, provide a memo signed by the building owner verifying this distinction in accordance with the definition herein under Eligibility.
Postbuild Documentation:
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The intent at Postbuild is to show achievement of the minimum requirements of 5.1b as well as more rigorous performance standard of this approach within 5.2b. This may be demonstrated in one of two ways:
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Submit the 5.2b Certification Plus for Existing Buildings Template - ASHRAE Option demonstrating that the savings requirement was achieved.
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Submit the 5.2b Certification Plus for Existing Buildings Template – ERI Option, demonstrating that the savings requirement was achieved.
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For both the ASHRAE Option and ERI Option, ensure that the operating EUI and emissions for the building(s) are calculated on the Overview Tab of the appropriate 5.2b template. Also input these values in the specified fields of the Criteria Compliance section of the project’s Postbuild certification application.
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Complete 5.1b commissioning requirements.
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Comply with either 5.3a or 5.3b.
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Comply with Criterion 5.5b.
Q: The Department of Energy ZERH PV Ready Checklist was designed for the needs of single family homes – should properties that are not single family still use it?
A: Properties for whom the single-family based ZERH checklist is not appropriate should still use the checklist as a guide, and, demonstrate adequate infrastructure is installed to accommodate a PV system to be installed in the future that will, at minimum, be sized to serve at least 60% of common area (house meter loads) or at least 10% of the full building load.
Please still use the ZERH PV Ready Checklist as the form of documentation, but, use these adjustments:
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Include the first five items of the PV Checklist
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The last four items of the PV Checklist have specific component guidelines which may not be appropriate for large buildings. Please follow the guidance regarding the general component, but ensure that that component is adequately sized, located, and/or installed in a way to accommodate the size of the system needed for the property.
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For instance, ensure that conduit is run from the array location to the inverter location and inverter location to electrical service location, but, the size of the conduit may be different than 1” (as currently included on the checklist) to accommodate the system needed at the site.
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A 4’x4’ plywood panel area for mounting system components may not be appropriate for the size of the system needed at the site; install blocking or a panel of a size needed to accommodate the site’s expected system.
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A 70-amp dual pole circuit breaker may not be an appropriate size for the site’s PV system; ensure adequate service is available to accommodate the site’s expected system.
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Eligibility/ Background
On May 2, 2024, Enterprise Green Communities released an addendum to Criterion 5.2b, Moving to Zero Energy: Near Zero Certification that provides a new compliance option specifically for rehabilitation projects pursuing Green Communities Certification Plus. As Criterion 5.4, the alternate means of achieving Green Communities Certification Plus, builds off of the deep energy reductions specified in Criterion 5.2b, we are releasing the following changes to 5.4 to specifically support and recognize rehabilitation projects prioritizing zero energy.
With this addendum, we are aligning Green Communities Certification Plus with the National Definition of a Zero Emissions Building, Part I: Operating Emissions.
The National Definition of a Zero Emissions Building, Part I: Operating Emissions incorporates energy efficiency, clean energy, and eliminating on site combustion (emissions). Demonstration of compliance with Option 1 or Option 2 below will satisfy the energy efficiency and clean energy aspects of the National Definition. In order to demonstrate the project has eliminated combustion on site, the project must also comply with Criterion 5.5b, Moving to Zero Carbon: All-Electric.
Requirements
Buildings that demonstrate compliance with one of the following options will be considered compliant with Criterion 5.4 and be recognized as achieving Enterprise Green Communities Certification Plus:
Option 1
Certify each building in the project to DOE ZERH program.
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Either install renewables and/or procure renewable energy, which in sum will produce as much, or more, energy in a given year than the project is modeled to consume. The renewable energy may be owned and produced on-site or off-site if the associated RECs are retained or retired by the building owner. Or, the renewable energy may be procured through a contract of at least 20 years from community solar, virtual power purchase agreements or Green-E certified renewable energy certificates.
Option 2
Certify each building in the project to a program that requires Zero Energy performance such as PHIUS ZERO, PHI Plus, PHI Premium, PHIUS+ Source Zero, or International Living Future Institute’s Zero Energy Petal, Zero Carbon Petal, or Living Building Certification.
Option 3
Projects that already demonstrate compliance with the Addendum to 5.2b, Prioritizing the Path to Certification Plus for Existing Buildings.
AND
Either install renewables and/or procure renewable energy, which in sum will produce as much, or more, energy in a given year than the project is modeled to consume. The renewable energy may be owned and produced on-site or off-site if the associated RECs are retained or retired by the building owner. Or, the renewable energy may be procured through a contract of at least 20 years from community solar, virtual power purchase agreements or Green-E certified renewable energy certificates.
Q: If a project includes electric equipment (of the types listed in the criterion) already, is it eligible for points for Criterion 5.5a?
A: Only equipment loads powered by a combustion source are eligible for optional points for designing and wiring a seamless switch to electricity as a fuel source.
Q: How do existing buildings with systems located above the design flood elevation comply with this criterion for optional points?
A: Although optional for most projects certifying to the 2020 Green Communities Criteria, Criterion 5.9 is mandatory for projects participating in the Louisiana Housing Corporation PRIME program regardless of a project’s specific site or elevation. Criterion 5.9 includes guidance for certain rehab projects in FEMA SFHA that are assumed compliant via compliance with mandatory Criterion 2.1, Sensitive Site Protection. In instances where existing buildings include systems that are located above the design flood elevation for that property, and that will not be replaced as part of the project, raising systems and equipment further may not be necessary to meet the intent of the criterion. However, designing for optimal system operation during an emergency and providing appropriate floodproofing is still required. Each project approach will be nuanced as a result of the project’s unique conditions.
Resources: Calculating the DFE: BFE (base flood elevation) + X (a safety factor)= DFE, unless the local community has defined it differently.If following The New York City Overlay of the 2020 Criteria, V2, this criterion is mandatory for New Construction projects only.
Option 3:
Advisory: This Option is not recommended for properties located below the “Warm-Humid” line of the 2018 IECC Figure 301.1.
Requirements of Option 3
Ensure all dwelling units are served by an ERV or HRV and provide a written statement/evidence that the project’s MEP Engineer(s) has evaluated humidity potential in the building. The statement must attest that the building and systems have been designed to ensure that year-round interior relative humidity will not exceed 50% in the winter and 60% in the summer.
The project must provide the following:
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Condensation evaluation for window-to-wall connections and at any non-thermally broken metal penetrations through the exterior envelope to ensure no condensation will occur at the project’s outdoor design conditions with indoor winter conditions held at 68F and 50% RH. Note that projects pursuing Passive House certification may submit their Passive House thermal bridge modeling report to comply with this item.
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Narrative summarizing ERV / HRV control strategies that are being utilized to manage year-round interior relative humidity levels:
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Measures that must be included to help manage cooling season interior humidity levels are:
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Appropriately sized cooling systems to ensure dehumidification capacity is maximized given the expected loads in the apartments
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Use of an ERV with moisture recovery to help keep exterior humidity from entering the space.
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An optional measure that can be implemented to help manage interior levels is use of a “dry mode” on the dwelling unit’s cooling system to improve dehumidification capacity during high interior RH humidity periods.
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Measures that must be included to help manage heating season interior humidity levels are:
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If unitized ERV is being used, the ERV system must have capability to boost flow rates during high interior humidity periods.
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If centralized ERV is being used, the ERV must have capability to partially bypass the energy recovery core or slow down the enthalpy wheel during periods of high interior humidity. Drawing(s) showing relative humidity monitors in return air ducts at the ERV / HRV to monitor apartment relative humidity.
Note that the system used to comply with this option will likely also serve to comply with Criterion 7.7 Ventilation.
Q: In the certification portal, how should a project indicate which Promoting Health Through Design Criterion, 7.11, 7.12, or 7.13, is being pursued to fulfill the mandatory requirement?
A: On the Criteria Compliance tab under the Promoting Health Through Design Criterion, 7.11, 7.12, or 7.13, select the check box under “Set as Mandatory” for the intended criterion. This action will revert the criterion to mandatory with zero optional points associated; enabling the remaining two criteria (of 7.11, 7.12, or 7.13) to each be pursued for eight optional points.
7.11, 7.12, 7.13 : Promoting Health Through Design
Q: If a project goes above the mandatory requirement to comply with one of Criteria 7.11, 7.12 & 7.13, and complies with two of the three criteria, would the project earn eight points total or eight points for each criterion?
A: All projects must comply with at least one of either Criterion 7.11, 7.12, or 7.13. No points are available for meeting this mandatory requirement. If a project complies with a criterion 7.11, 7.12 and 7.13 in addition to meeting the mandatory requirement, it will earn eight points for each additional criterion.
I.e. A project that complies with Criterion 7.11 earns zero points and meets the mandatory requirement for Promoting Health Through Design. A project that complies with Criterion 7.11 AND 7.12 meets the mandatory requirement for Promoting Health Through Design and earns eight points. And a project that complies with 7.11, 7.12 AND 7.13 meets the mandatory requirement for Promoting Health Through Design and earn sixteen points.
Q: In the certification portal, how should a project indicate which Promoting Health Through Design Criterion, 7.11, 7.12, or 7.13, is being pursued to fulfill the mandatory requirement?
A: On the Criteria Compliance tab under the Promoting Health Through Design Criterion, 7.11, 7.12, or 7.13, select the check box under “Set as Mandatory” for the intended criterion. This action will revert the criterion to mandatory with zero optional points associated; enabling the remaining two criteria (of 7.11, 7.12, or 7.13) to each be pursued for eight optional points.
7.11, 7.12, 7.13 : Promoting Health Through Design
Q: If a project goes above the mandatory requirement to comply with one of Criteria 7.11, 7.12 & 7.13, and complies with two of the three criteria, would the project earn eight points total or eight points for each criterion?
A: All projects must comply with at least one of either Criterion 7.11, 7.12, or 7.13. No points are available for meeting this mandatory requirement. If a project complies with a criterion 7.11, 7.12 and 7.13 in addition to meeting the mandatory requirement, it will earn eight points for each additional criterion.
I.e. A project that complies with Criterion 7.11 earns zero points and meets the mandatory requirement for Promoting Health Through Design. A project that complies with Criterion 7.11 AND 7.12 meets the mandatory requirement for Promoting Health Through Design and earns eight points. And a project that complies with 7.11, 7.12 AND 7.13 meets the mandatory requirement for Promoting Health Through Design and earn sixteen points.
Q: In the certification portal, how should a project indicate which Promoting Health Through Design Criterion, 7.11, 7.12, or 7.13, is being pursued to fulfill the mandatory requirement?
A: On the Criteria Compliance tab under the Promoting Health Through Design Criterion, 7.11, 7.12, or 7.13, select the check box under “Set as Mandatory” for the intended criterion. This action will revert the criterion to mandatory with zero optional points associated; enabling the remaining two criteria (of 7.11, 7.12, or 7.13) to each be pursued for eight optional points.
7.11, 7.12, 7.13 : Promoting Health Through Design
Q: If a project goes above the mandatory requirement to comply with one of Criteria 7.11, 7.12 & 7.13, and complies with two of the three criteria, would the project earn eight points total or eight points for each criterion?
A: All projects must comply with at least one of either Criterion 7.11, 7.12, or 7.13. No points are available for meeting this mandatory requirement. If a project complies with a criterion 7.11, 7.12 and 7.13 in addition to meeting the mandatory requirement, it will earn eight points for each additional criterion.
I.e. A project that complies with Criterion 7.11 earns zero points and meets the mandatory requirement for Promoting Health Through Design. A project that complies with Criterion 7.11 AND 7.12 meets the mandatory requirement for Promoting Health Through Design and earns eight points. And a project that complies with 7.11, 7.12 AND 7.13 meets the mandatory requirement for Promoting Health Through Design and earn sixteen points.
Q: Can projects follow more than one of the available Methods to comply with this criterion and accommodate different utility configurations?
A: Yes, project teams may choose more than one of the Methods available in the criterion; A, B, C or D, to enable project building configuration and utility provider(s) to share energy and water data per the criteria.