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review of rating files (energy models) submitted for certification by a Rater annually. Additionally, QA Providers must perform on-site field QA on 1% of ratings submitted by a Rater annually. RESNET requires these QA Providers submit annual packages verifying their QA work complies with RESNET standards, which are reviewed by RESNET Staff members. On an annual basis, RESNET also performs field quality assurance audits on 25% of QA Providers, and 50% of QA Providers receive a file quality assurance audit.
309:
323:
100:
146:
calculates energy performance based on hourly weather data for the entire year. This method takes into account variations in energy use due to changes in weather conditions throughout the year, and may be more accurate for buildings with complex energy systems or for buildings located in areas with extreme weather conditions.
246:
Training programs through
Building Science Education: ICC-approved Plans Examiner/Energy Code Inspector, ANSI/RESNET/ICC 301-2019, ANSI/RESNET/ICC 380-2019, ANSI/RESNET/ACCA 310-2020, ANSI/ACCA 12-2018, Energy Modeling, and HouseRater training (approximately 80+ hours of training). Upon completion of
134:
The ERI Index is the only EnergyStar accepted index. However there are derivative calculations that include the RESNET-proprietary HERS Index which is modified by RESNET's MINHERS Standards. RESNET has publicly stated that the HERS Index modifies the ANSI Standards for their proprietary HERS Ratings.
259:
Please note, some States (such as Texas) have additional requirements for individuals who perform code compliance activities. This includes additional certification(s) from the
International Code Council and related organizations, which the HERS Rater certification does not comply with. In order to
66:
Home energy ratings can be used for either existing homes or new homes. A home energy rating of an existing home allows a homeowner to receive a report listing options for upgrading a home's energy efficiency. The homeowners may then use the report to determine the most effective ways in which to
42:
based on normalized modified end-use loads (nMEULs). In the United States, the
Residential Energy Services Network (RESNET) is responsible for creation and maintenance of the RESNET Mortgage Industry National Home Energy Rating Standards (MINHERS), a proprietary system of standards, which includes
226:
Training: HERS Rater candidates shall attend a HERS Rater training course presented by a RESNET-accredited
Training Provider, either in-person or through self paced online programs. Upon completion of the HERS Rater training course, candidates must pass the RESNET Standard Rater exam, the RESCAZ
177:
Projected ratings give home owners and builders an estimate of what a home's estimated efficiency will be like after construction or improvements, so that they may determine the most cost-effective route to improve a building's efficiency. A confirmed rating, which indicates the home's as-built
145:
The "seasonal" option calculates energy performance based on typical weather patterns for each season of the year. This method assumes that the building's energy use is consistent with the average energy use for buildings in that region during that season. The "hourly" option, on the other hand,
271:
RESNET's MINHERS grants the authority of individual companies, called Rating
Providers or QA Providers to offer this oversight internally or with 3rd parties. These organizations are required to have RESNET-certified Quality Assurance Designees contracted or on staff to perform a minimum of 10%
205:
Confirmed, Sampled, and
Threshold Ratings that are built above code requirements are registered with public databases such as the RESNET Registry and the BSI Registry. Some confirmed ratings also extend an economic guarantee on energy usage. Due to the many different proprietary energy indexes,
75:
A home energy rating can be used to estimate the energy efficiency of a home compared to a reference home built to the 2006 IECC Standards or estimate the efficiency of a home that is being constructed or improved. A home energy rating of a home prior to construction or improvement is called a
292:
As early as 2014, researchers from
Proctor Engineering discovered wide variations between 6 HERS Raters. They found between 12% and 48% difference in the HERS Index depending on the home. A later study in 2018, funded by the U.S. Department of Energy and performed by regional energy efficiency
296:
Additionally, the U.S. Department of
Justice released a statement in 2023 about a RESNET-accredited QA Provider, SkyeTec (owned by SMC Systems). The allegations in the settlement agreement include failing to perform required inspections but still certifying homes with the ENERGY STAR program.
254:
Professional
Development: All individuals credentialed by the Building Science Institute must complete 6 hours of continuing education per calendar year to maintain their credential. Both organizations have additional certification levels to perform solely field inspection or energy modeling
230:
Mentorship: After successful completion of the HERS Rater training course and three exams, the candidate must sign a contract with a RESNET Rating
Provider in order to be mentored through five Probationary ratings. The Probationary Rater shall complete these ratings under the supervision and
107:
Home energy ratings provide a relative energy use index called the Energy Rating Index (ERI). An Index of 100 represents the estimated energy performance equivalent to a home built to the 2006 IECC standards and an Index of 0 (zero) indicates that the building uses no net purchased energy (a
214:
In order to provide certified Energy Ratings to rating clients such as builders or homeowners, individuals must become a Certified Rater through an EPA recognized HCO and have attended and successfully completed an EPA-recognized training class. One example of a well-known Certified
280:
guidelines. Verification Organizations contracted through BSI can perform quality management internally, provided the Quality Assessors are properly credentialed by BSI and do not conflict with the Structural Requirements for Verification Organizations.
250:
Mentorship: 10 energy models of different dwelling unit types, 5 pre-drywall / insulation verifications, and 5 final verifications. All of these must be completed under the mentorship of BSI-credentialed Quality Assessors or Quality Assessment
63:. The Building Science Institute, Ltd. Co. (BSI) is another EPA recognized HCO that maintains the ANSI Standards to produce Energy Ratings and compliance with above-code programs such as the ENERGY STAR New Homes Program.
43:
standards language for the certification and quality assurance for RESNET Provider organizations. RESNET is an EPA recognized Home Certification Organization (HCO) that also help's create standards in compliance with the
293:
organizations, found variations in the HERS Index. The average variation was 13 points, with a project in Portland having a range of 6 HERS Index points and a project in Denver having a range of 32 HERS Index points.
76:“projected rating”. A home energy rating that is used to determine a home's as-built estimated energy efficiency is referred to as a “confirmed rating". A home energy rating that is generated through an accepted
275:
BSI performs quality management oversight activities through automated activities in HouseRater, manual review of all projects submitted prior to registration, and annual organization reviews according to
80:
is called a "sampled rating". A home energy rating that receives verification for all required minimum rated features but relies on threshold values for tested features is called a "threshold rating".
289:
Home energy rating systems in the United States are not without concerns regarding the ethical practices of the companies and the variability of the outputs generated by the rating companies.
231:
direction of the Provider. Upon successful completion of all three Probationary ratings, and any other requirements outlined by the Provider, the individual will become a Certified HERS Rater.
543:
178:
estimated efficiency, requires an inspection of the home from an energy field verifier. The energy field verifier reviews the home to identify its energy characteristics, such as
238:
in a 3-year period. PDHs may be earned by attending individual training sessions offered by RESNET Training Providers or attending the RESNET Building Performance Conference.
242:
Under BSI's Building Science Education Training & Certification System Process 02, prior to credentialing, candidates must successfully complete the following:
124:
164:, "based on" the HERS Score, apparently simply by subtracting the HERS Index from 100. In this new scale, higher values correspond again to better performance.
67:
upgrade the home's energy efficiency. A home energy rating of a new home allows buyers to compare the energy efficiency of homes they are considering buying.
123:” for private financial investors, and by the US government for verification of building energy performance for such programs as federal tax incentives, the
844:
142:
energy code. Typically differences include changes to mechanical ventilation, or seasonal/hourly calculation methods for modeling a buildings energy use.
260:
participate in above-code programs like the ENERGY STAR Program, Certified Raters through RESNET or BSI must complete additional training and exams.
206:
states cannot legally mandate certain indexes for building code compliance. As a result, many homes are not registered with the HCO's registry.
385:
44:
20:
535:
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the ICC Plans Examiner/Energy Code Inspector training, candidates must pass the ICC-proctored Plans Examiner/Energy Code Inspector Exam.
773:
629:
373:
139:
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Energy assessments take into account different climatic zones in different parts of the country and are benchmarked according to
875:
510:
337:
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Certification and Professional Development: HERS Raters must maintain their certification by obtaining 18 RESNET-approved
187:
646:
816:
747:
697:
379:
165:
84:
24:
845:"SMC Systems Inc. to Pay $ 2.35 Million to Resolve Allegations of False Statements Relating to Energy Star Program"
235:
157:
227:
Simulation Exam, and the RESNET Rater Simulation Practical Examination. The tests are open book and open note.
268:
Energy Ratings are required to receive quality oversight from EPA approved HCO's, such as RESNET and BSI.
77:
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As of March 2022, a Carbon Index measurement has been added to ANSI 301-2019 through Addendum D-2022.
154:
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39:
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Under RESNET's MINHERS, the process of becoming a Certified HERS Rater includes the following:
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817:"Home Energy Rating Variability Study: A Comparison in New Single-family Homes"
340: – Process used to design and document building and infrastructure designs
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791:
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leakage, and mechanical ventilation testing is usually part of the rating.
536:"Standard Development Process For HERS Impact and Increased Deliberations"
153:", which ran in the opposite direction: The higher the value, the better.
19:
This article is about home energy ratings in the USA. For Australia, see
322:
459:
382: – United Kingdom measurement of a home's energy efficiency
131:
program and the U.S. Department of Energy’s Building America Program.
352: – Inspection, survey and analysis of energy flows in a building
138:
Additional ERI variants are modified by different iterations of the
774:"All Over the Map — The Imprecision of 24 California HERS Ratings"
98:
361:
183:
602:
388: – Australian thermal performance for residential homes
346: – Canadian Regulatory Mark for energy efficiency
435:"RESNET Mortgage Industry National Energy Rating Standards"
216:
439:
RESNET Mortgage Industry National Energy Rating Standards
16:
United States measurement of a home's energy efficiency
182:
levels, window efficiency, wall-to-window ratios, the
486:"Energy Rating Index Quality Management Organization"
627:
http://www.ecoachievers.com/services-view/guarantee/
376: – American environmental certification program
277:
849:U.S. Attorney's Office, Middle District of Florida
38:is an American estimated measurement of a home's
702:RESNET MINHERS Continuous Maintenance Standards
752:RESNET MINHERS Continuous Maintenance Version
370: – House designed for reduced energy use
362:Leadership in Energy and Environmental Design
125:United States Environmental Protection Agency
27:. For a general description of the term, see
8:
95:Energy Rating Index (ERI) and related scales
824:Southeast Energy Efficiency Alliance (SEEA)
727:TEXAS BUILDING ENERGY PERFORMANCE STANDARDS
364: – Standard for green building design
566:"RESNET-ANSI American National Standards"
511:"Home Certification Organizations (HCOs)"
217:RESNET-accredited HERS Rater is A9 Green
198:test for air leakage, outside and total
119:in the mortgage loan, certification of “
792:"HERS Estimates Vs. Energy Consumption"
405:
194:system. Performance testing, such as a
692:
690:
603:"Building Science Institute Registry"
386:Nationwide House Energy Rating Scheme
236:Professional Development Hours (PDHs)
149:The HERS Index replaced the earlier "
112:). The lower the value, the better.
45:American National Standards Institute
21:Nationwide House Energy Rating Scheme
7:
429:
427:
425:
413:
411:
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358: – US energy efficiency program
264:Quality management of energy ratings
85:average household energy consumption
607:Building Science Institute Registry
490:Building Science Institute, Ltd. Co
278:American Society for Quality (ASQ)
14:
546:from the original on July 5, 2022
162:EnergySmart Home Scale (E-Scale)"
374:National Green Building Standard
321:
307:
140:International Code Council (ICC)
772:Bailles, Allison (2014-09-16).
590:http://www1.resnet.us/registry/
173:Projected and confirmed ratings
1:
698:"MINHERS Standards Chapter 2"
338:Building information modeling
117:building's energy performance
636:Guaranteed Home Energy Usage
160:presented a new scale, the "
380:National Home Energy Rating
25:National Home Energy Rating
892:
592:RESNET Registry of Ratings
464:Building Science Institute
184:heating and cooling system
18:
647:"Energy Rating Companies"
158:U.S. Department of Energy
418:ANSI/RESNET/ICC 301-2019
876:Building energy rating
104:
87:particular to a given
671:"RESNET HERS® Raters"
394: – Type of house
190:of the home, and the
102:
110:Zero Energy Building
796:Proctor Engineering
748:"MINHERS Chapter 9"
723:"HEALTH AND SAFETY"
329:Architecture portal
115:For capitalizing a
29:House Energy Rating
651:www.energystar.gov
632:2015-08-22 at the
210:Types of verifiers
105:
78:sampling procedure
36:Home Energy Rating
23:. For the UK, see
675:www.hersindex.com
188:solar orientation
103:RESNET HERS Index
40:energy efficiency
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853:. Retrieved
851:. 2023-09-29
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828:. Retrieved
826:. 2018-09-30
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800:. Retrieved
798:. 2024-05-02
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350:Energy audit
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515:ENERGY STAR
460:"Home Page"
356:ENERGY STAR
196:blower door
129:Energy Star
855:2024-05-02
830:2024-05-02
802:2024-05-02
680:2024-07-31
656:2023-05-01
400:References
285:Criticisms
180:insulation
151:HERS Score
121:White Tags
344:EnerGuide
251:Designees
47:, namely
870:Category
630:Archived
550:July 18,
544:Archived
470:July 18,
301:See also
61:ANSI 850
57:ANSI 380
53:ANSI 310
49:ANSI 301
757:May 27,
732:May 27,
707:May 27,
612:May 27,
575:May 27,
520:May 27,
495:May 27,
444:May 27,
255:duties.
570:RESNET
540:RESNET
59:, and
820:(PDF)
71:Usage
759:2022
734:2022
709:2022
614:2022
577:2022
552:2022
522:2022
497:2022
472:2022
446:2022
200:duct
34:The
127:’s
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