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Mortgage Industry National Home Energy Rating Standards

The RESNET HERS® ratings are now based on Standards ANSI/RESNET/ICC 301, ANSI/RESNET/ICC 310 and ANSI/RESNET/ICC 380 and their ANSI approved Addenda together with other requirements of Chapter 3. The editions of the Standards and all the Addenda are listed in Chapter 3, Section 304 Normative References. All Addenda listed below are mandatory as of the date indicated. See the heading on the first page of each Addendum for the Voluntary Compliance Date, Mandatory Compliance Date and Transition Period where a Transition Period has been authorized. The edition of Standard 301 is the 2019 edition, ANSI/RESNET/ICC 310-2019. Compliance with the 2019 edition was mandatory as of January 1, 2022 based on the building permit date or alternate authorized by MINHERS® Addendum 43. The third edition of Standards 301 and 380, ANSI/RESNET/ICC 301-2022 and ANSI/RESNET/ICC 380-2022, have been completed but have not yet been adopted for the RESNET HERS®. Adoption and transition to the third editions will occur at a future date. See the link below to review the standards.

Resources

Mortgage Industry National Home Energy Rating Systems, Continuous Maintenance Edition (Incorporates all Adopted Amendments)

Referenced ANSI/RESNET Standards

 

Standards Out for Public Comment & Historical Information

To view current RESNET ANSI and MINHERS® Draft Standards that are currently out for Public Comment, click the link below.

Standards Out for Public Comment

To view historical information on approved RESNET ANSI and MINHERS® Standard information, click the link below.

RESNET Historical Standard Information

Historical Information 

Addendum 47i – Interim Addendum, Test Exception for Ducts in Conditioned Space, Authorized April 5, 2020

Addendum 47f – Test Exception for Ducts in Conditioned Space – Mandatory September 10, 2020

Addendum 48i – COVID-19 Pandemic Exception for Onsite Airtightness Tests – Authorized April 20, 2020

Addendum 34 – QA Datafile– Mandatory January 1, 2021

Addendum 49i – Interim Credits for HVAC Installation Quality Grading – Authorized July 6, 2020 (Replaced July 21, 2020 by ANSI/RESNET/ICC 301-2019 Addendum B-2020 changes)

Addendum 50 – HERS® Modeler – Mandatory January 1, 2022

Addendum 51i – Internal Gains for Energy Rating Reference Homes – Authorized June 25, 2020 (Replaced July 21, 2020 by ANSI/RESNET/ICC 301-2019 Addendum B-2020 changes)

Addendum 52i – Eligibility to Grade HVAC Systems Authorized August 16, 2020

Addendum 53i – Equipment Efficiency and Sizing, and Clarifications of Standard 301-2019 – Authorized October 13, 2020

The following are the amendments to the National Home Energy Rating Standards that were adopted by RESNET in 2019. The key to the success of the rating industry is setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments to the National Home Energy Rating Standards that were adopted by RESNET in 2018. The key to the success of the rating industry is setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments to the National Home Energy Rating Standards that were adopted by RESNET in 2017. The key to the success of the rating industry is setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments to the National Home Energy Rating Standards that were adopted by RESNET in 2016. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments to the National Home Energy Rating Standards that were adopted by RESNET in 2015. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments to the National Home Energy Rating Standards that were adopted by RESNET in 2014. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments to the National Home Energy Rating Standards that were adopted by RESNET in 2013. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments of the National Home Energy Rating Standards adopted by RESNET in 2012. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments of the National Home Energy Rating Standards adopted by RESNET in 2011. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments of the National Home Energy Rating Standards adopted by RESNET in 2010. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments of the National Home Energy Rating Standards adopted by RESNET in 2009. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments of the National Home Energy Rating Standards adopted by RESNET in 2008. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments of the National Home Energy Rating Standards adopted by RESNET in 2007. The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments adopted are:

The following are the amendments of the National Home Energy Rating Standards adopted by RESNET in 2006. key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry.

The amendments being proposed are:

The key to the success of the rating industry is to setting and implementing the standards for quality of rating services. Having technically sound and up-to-date standards enhances the credibility of the entire rating industry and provides greater confidence in the rating services.

In 2004 RESNET adopted a set of comprehensive enhancements to its rating standards. Since the enhancements were adopted a number of changes have taken place that effect building performance. These changes includes the new proposed 2006 ENERGY STAR for Homes guidelines and passage by Congress of tax credits for residential energy efficiency. In addition it was discovered that there was a need to tweak some of the provisions of the enhancements. For this reason a set of amendments are being proposed to the national home energy rating standards.

There are two main categories of amendments that were adopted: enhancements to the technical guidelines and a modification to the rating quality assurance provisions. The most significant change is changing the current rating score to a “HERS® Index” where a score of “0” equates to a net zero energy home and a score of “100” equates to the HERS® reference home.

2005 Adopted Amendments

The RESNET Standards Drafting Committee was appointed in 2001 with the approval of the RESNET Board of Directors to review RESNET’s Mortgage Industry National Home Energy Rating Standards and draft proposed amendments to the standard. After three years of research, deliberations, vetting and public review, the committee developed a set of enhancements to the national rating standard developed by the committee.

The enhancements were endorsed by the RESNET Board of Directors and adopted by the Standards Revisions Committee on December 23, 2004. The Revisions Committee is composed of three representatives of State Energy Offices and three representatives of the rating industry.

The adopted enhancements to the national home energy rating standards were developed through a three-year process included:

  • Publicly soliciting recommendations for proposed changes to the standard in 2001
  • A consensus process in which the drafting committee reviewed and developed the proposed amendments
  • An aggressive vetting and robust education effort to obtain input from the key stakeholders of rating services.
  • The education effort included presentations to the National Association of Home Builders Energy Subcommittee, RESNET Conference, EEBA Conference, and Affordable Comfort Conference and numerous articles in RESNET Notes, Home Energy Magazine, and Energy Design Update.
  • An industry education effort took place after the amendments were drafted and before the public comment process. The proposed amendments and their justifications were posted on the RESNET web site 30 days prior to the public comment process. A major emphasis of the 2004 RESNET Conference was to educate the industry on the proposed amendments. Break-out sessions were dedicated to the proposed amendments that would have the greatest impact on the rating industry and a half day general session was dedicated to a forum on the proposed amendments. In the general session, every proposed amendment was presented and conference participants were allowed to express their views.
  • A 75 day public comment period followed the education effort. The comment period was extended by 15 days upon the request of the National Association of Home Builders.
  • A seven month review period followed, where the drafting committee carefully reviewed every comment received and made necessary changes to the amendments based upon the comments. This effort included consultation with key experts such as Gary Nelson of the Energy Conservatory, Hank Rutkowski with ACCA, and interest groups such as the North American Insulation Manufacturers Association.

The result of this process is a set of enhancements to the national home energy rating standards that solve many known issues with the existing standard, are technically defendable, and do not present an undue burden on the rating industry or the clients of its services. The result enhances the credibility of our industry by moving the industry into the 21st century and setting high standards of quality.

To review the 2004 enhancements to the national home energy rating standards click on Adopted Enhancements to the Mortgage Industry National Home Energy Rating Standards.