RESNET

What RESNET does

RESNET (Residential Energy Services Network) is an independent U.S. non-profit standards organization founded in 1995 and headquartered in Oceanside, California, that develops and maintains the HERS Index — the nationally recognized scoring system for measuring residential energy performance against the 2004/2006 IECC reference home. The organization certifies and credentials a national network of HERS Raters, Rating Field Inspectors, HERS Modelers, Quality Assurance Designees (QADs), and EnergySmart Contractors, who conduct the underlying energy ratings on homes. RESNET also accredits rating software tools and rater training providers, and co-develops ANSI/RESNET/ICC national standards (notably 301-2014 and 380-2016) that underpin residential energy code compliance in 16 states.

The technology stack is built on conventional building-science diagnostic instrumentation (blower door tests, duct leakage testers, combustion analyzers, infrared cameras) feeding accredited rule-based rating software; AI/ML is not part of the disclosed capability set. The platform has accumulated 5,037,607 HERS-rated homes as of 2026, with 187,442 ratings completed in the current year. Adjacent product lines extend the HERS methodology into carbon emissions (HERS Carbon Index), water efficiency (HERSH2O), and manufactured housing. RESNET serves four primary customer segments — homeowners and buyers, home builders, mortgage lenders (including FHA, VA, Fannie Mae, Freddie Mac), and certified energy professionals — and is recognized by the U.S. Department of Energy, U.S. EPA, and the United Nations Sustainable Buildings and Climate Initiative.

RESNET generates revenue through a portfolio of small-dollar, recurring and event-driven streams: annual professional membership and certification fees for Raters and QADs (QAD test fee: $150), accreditation/licensing fees from rating software providers and training providers, and conference and conference-recording revenue (recordings priced at $250 for the 2026 set). Pricing for end-customer energy audits is set in the market by certified Raters, not by RESNET (Home Energy Survey ~$300, General Energy Audit $300-$800, comprehensive HERS rating national average $450 across three site visits). The go-to-market motion is sales-led through the certified professional network, supplemented by content marketing (blog, RES Talk podcast), the National Rating Registry, and an annual conference that functions as the industry's primary professional development event.

Name

RESNET

Legal name

Residential Energy Services Network (RESNET)

Website

https://resnet.us

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

11–50 employees

Short description

RESNET is a U.S. non-profit standards organization that developed the HERS Index, certifying a national network of home energy raters and contractors who assess residential energy efficiency for homeowners, builders, and mortgage lenders.

Ownership category

akta.pro rank

Product category

Home Energy Rating Standards and Certification

NAICS

Environmental Consulting Services (541620)

SIC

Auto Controls For Regulating Residential & Comml Environments (3822)

akta.pro primary industry

Real Estate ESG / Sustainability & Resilience Advisory (Decarbonization, Climate Risk) (BPAJANAI)

akta.pro secondary industries

Energy Management & Monitoring (Submetering, Dashboards, Analytics) (BPABAGAD), Customer Energy Engagement (In-Home Displays, Portals, Usage Insights) (EUADAFAH)

Keywords

• Home energy ratings
• HERS certification
• Building performance standards
• Energy efficiency certification
• Residential energy auditing

Headquarters

HQ city

Moorpark

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Professional Membership and Certification Fees: RESNET generates revenue through membership fees and certification/testing fees for HERS Raters, Rating Field Inspectors, Home Energy Survey Professionals, and EnergySmart Contractors. Professionals must complete rigorous training, pass the RESNET National Rater Test, and maintain annual certification to remain listed in RESNET directories.
2. Conference and Event Revenue: RESNET hosts annual conferences (such as the 2026 Conference in San Antonio, Texas) and sells session recordings for $250, earning professional development credits (PDUs) per recording viewed.
3. QAD Test and Training Fees: Quality Assurance Designee testing costs $150, with additional fees for professional development and training programs. QADs must reapply annually and complete professional development requirements.
4. Software Tool Accreditation: RESNET accredits rating software tools that comply with RESNET standards for calculating home energy ratings. Providers using these tools must be accredited.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels6 records

Core offering

RESNET develops and maintains the HERS Index, the nationally recognized scoring system that measures residential home energy performance on a scale from 0 (net-zero) to 150+ (inefficient), and operates the standards, training, certification, and accreditation infrastructure that lets HERS Raters, Quality Assurance Designees, and EnergySmart Contractors deliver HERS Ratings, Home Energy Surveys, and General Energy Audits across the United States. Its portfolio also includes accredited HERS rating software tools, the HERS Carbon Index, the HERSH2O water rating, and the National Rating Registry.

Product overview

RESNET operates as a platform-plus-standards organization offering the HERS Index as its core product—a nationally recognized home energy rating system. The portfolio includes HERS Ratings (energy performance assessments), Home Energy Surveys and General Energy Audits (two tiers of assessment services), professional certification programs (HERS Rater Certification, QAD Certification, EnergySmart Contractor Program), add-on indices (HERS Carbon Index, HERSH2O), educational products (Conference Recordings), and the National Rating Registry. These products work together to create a comprehensive ecosystem for home energy efficiency assessment, certification, and professional development, with the HERS Index serving as the unifying standard across all offerings.

Differentiator

Problem solved

Functional benefit

Brands

• HERS Index: The Home Energy Rating System Index - the industry standard by which a home's energy efficiency is measured, developed by RESNET
• HERS Carbon Index
• HERSH2O
• Quality Assurance Designee (QAD)

Products and services

• HERS Index (Home Energy Rating System) Nationally recognized scoring system that rates a home's energy performance on a relative scale (0 = net-zero, 100 = 2004/2006 IECC reference new home, 130 = typical resale home). Enables apples-to-apples comparison of home energy efficiency for homeowners, buyers, builders, raters, and mortgage lenders.
• HERS Ratings Comprehensive energy performance assessments conducted by certified RESNET HERS Raters using diagnostic testing (blower door, duct leakage, combustion analysis, infrared cameras) to generate an official HERS Index Score for a home. Delivered to homeowners, builders, and lenders nationwide; national average cost approximately $450 including three site visits.
• Home Energy Survey Visual inspection-based energy assessment that evaluates building envelope features, HVAC equipment, and appliances, and identifies basic recommendations for improving energy efficiency without diagnostic testing equipment. Typically priced around $300.
• General Energy Audit Detailed energy assessment that includes diagnostic testing with specialized equipment (blower door, duct leakage tester, combustion analyzer, infrared camera) and computer software analysis to identify and prioritize energy improvements. Typically priced $300-$800.
• HERS Rater Certification National training and certification program for home energy raters, recognized by the U.S. Department of Energy, U.S. EPA, and the U.S. mortgage industry. Requires completing rigorous training, passing the RESNET National Rater Test, and agreeing to abide by the RESNET Code of Conduct. Annual certification maintenance required.
• Quality Assurance Designee (QAD) Certification Advanced certification for quality assurance professionals who verify rater compliance and conduct Certification Reviews for ENERGY STAR and Zero Energy Ready Home programs. Requires passing a 100-question, 3-hour timed test with an 80% passing score, plus field and file review experience. QAD test fee is $150 with annual reapplication and professional development requirements.
• HERS Carbon Index Rating and reporting tool that measures and communicates the carbon footprint of homes based on their energy consumption and efficiency, extending the HERS framework to address greenhouse gas emissions.
• HERSH2O (Water Rating Index) Rating system that measures and certifies residential water efficiency, working in conjunction with the HERS Index for comprehensive home resource efficiency assessment.
• 2026 RESNET Conference Session Recordings Educational recordings from the annual RESNET Conference providing professional development credits (PDUs) for HERS Raters, QADs, builders, and other industry professionals across ten specialized tracks.
• RESNET EnergySmart Contractor Program Contractor qualification program ensuring high skill levels, commitment to excellence, and Code of Ethics compliance for contractors performing energy-efficient home improvements. Qualified contractors receive ongoing training through annual continuing education courses administered by accredited CEQ Providers.
• National Rating Registry Public registry at hersindex.com containing information on certified HERS Raters, Rating Companies, and HERS Index Scores of rated homes. Allows homeowners, lenders, and appraisers to verify certifications and search for HERS-rated homes.
• RESNET National Rater Test National certification examination for prospective HERS Raters covering building science, health and safety, insulation, HVAC, water heating, appliances, air leakage, distribution systems, ventilation, and rating system knowledge. Required step in obtaining HERS Rater certification.

Quantifiable outcome

• HERS Index Score of 0 indicates Net Zero Energy Home producing as much energy as it consumes
• +6 more outcomes

Named customers1 record

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Five partnerships are on record, tiered minor and core.

• United Nations Sustainable Buildings and Climate InitiativeminorStrategic or Co-development PartnerRESNET is a member of the United Nations Sustainable Buildings and Climate Initiative, aligning with global sustainability goals and contributing to international efforts to reduce building energy consumption and greenhouse gas emissions.
• U.S. Department of Energy (DOE)coreStrategic or Co-development PartnerRESNET creates national training and certification standards for HERS Raters and Home Energy Survey Professionals recognized by the U.S. Department of Energy. DOE recognizes RESNET standards for energy code compliance in 16 states.
• U.S. Environmental Protection Agency (EPA)coreStrategic or Co-development PartnerRESNET works with EPA on ENERGY STAR Certified Homes and Zero Energy Ready Home (ZERH) certification programs. RESNET provides the quality assurance infrastructure for verifying that homes meet EPA's strict requirements.
• U.S. Mortgage Industry (Fannie Mae, Freddie Mac, FHA, VA)coreStrategic or Co-development PartnerThe U.S. mortgage industry recognizes RESNET's HERS Index for energy efficient mortgages (EEMs) and energy improvement mortgages (EIMs). Federal agencies FHA and VA have specific guidelines supporting EEMs that use HERS Index scores.
• International Code Council (ICC)coreTechnology or IntegrationRESNET standards are developed in partnership with ICC, including ANSI/RESNET/ICC Standard 301-2014 and ANSI/RESNET/ICC Standard 380-2016, establishing the technical foundation for home energy ratings.

Scale indicators10 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• ENERGY STAR (Residential New Construction): EPA's ENERGY STAR Certified Homes program uses RESNET's HERS Index as the required scoring methodology. Comparable because both certify residential energy performance, with ENERGY STAR serving as the federal branding layer over RESNET's technical rating infrastructure.
• Passive House Institute US (PHIUS): PHIUS certifies passive house standard buildings and certifies professionals (CPHC) in residential deep-energy efficiency. Comparable because both certify energy performance of homes and train/certify rating professionals, but PHIUS focuses on a stricter thermal envelope standard.
• Home Innovation Research Labs (NGBS): Manages the National Green Building Standard (ICC 700) for residential green certification. Comparable because both run ANSI-accredited residential green building certification programs and accredit providers/raters in the same builder market.
• Building Performance Institute (BPI): BPI certifies building analysts, energy auditors, and retrofit professionals for residential and light commercial buildings. Comparable because both serve as national certification bodies for home energy professionals, though BPI focuses more on existing-home retrofits while RESNET spans new construction and existing homes.
• Earth Advantage Institute: Nonprofit certifying sustainable homes primarily in the Pacific Northwest with the Earth Advantage New Homes and Existing Homes certifications. Comparable because both certify residential energy performance and produce research on green home value premiums, though Earth Advantage is more regional.

Broad incumbents

• LEED for Homes (USGBC): U.S. Green Building Council's LEED rating system includes residential certification. Comparable because both certify sustainable/energy-efficient homes, but LEED is a broader green-building standard spanning commercial and residential, while RESNET specializes in residential energy performance.
• International Code Council (ICC): Develops model building codes (IECC, IRC) and co-publishes ANSI/RESNET/ICC standards with RESNET. Comparable because ICC's energy codes directly reference HERS ratings and partner with RESNET on standards development, making ICC both a partner and an adjacent standards body.
• Zero Energy Ready Home (DOE): U.S. Department of Energy program certifying high-performance homes, with RESNET providing the quality assurance infrastructure. Comparable because ZERH certification is conducted through RESNET-certified raters, making DOE both a partner and the federal program whose policy decisions affect RESNET's role.

Others

• CLEAResult: Largest North American provider of energy efficiency programs for utilities, operating accredited rating provider services that use RESNET HERS standards. Comparable because CLEAResult is one of RESNET's largest accredited rating providers and a significant customer of RESNET's standards, but its core business is utility program implementation.

Regional players

• PEAR (Plumbed Equipment and Appliance Research): California-focused energy rating and certification body for residential water and energy efficiency. Comparable because both certify residential efficiency performance, but PEAR is California-centric while RESNET operates nationally.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks3 records

Key highlights6 records

Customer concentration

• Xx.com/resnetus
• YouTubeyoutube.com/user/NATRESNET
• Facebookfacebook.com/ResnetSmartHome
• LinkedInlinkedin.com/groups?home=&gid=3540707

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about RESNET