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What is the HERS Index?
The Home Energy Rating System (HERS) Index is the INDUSTRY STANDARD by which a home's energy efficiency is measured. It’s also the NATIONALLY RECOGNIZED system for inspecting and calculating a home's energy performance.



The Building Performance Institute is the nation's premier credentialing, quality assurance and standards setting organization for home performance professionals.  Since 1993, BPI has been setting technical standards for home energy auditing and energy efficiency upgrades. We develop BPI Standards using an open, consensus-based process built on sound building science. From these standards, we develop rigorous written and field exams leading to professional certifications for individuals, companywide credentials for BPI GoldStar Contractors and quality assurance services that help raise the bar in home performance contracting.
BPI certified professionals hold over 20,000 active certifications across the nation and in three foreign countries. More than 110 state, local and utility energy efficiency programs specify BPI credentials for participating contractors, to ensure quality.

How BPI helps homeowners
For many homeowners and tenants, energy bills account for far too much of the monthly budget. These homes suffer from performance problems ranging from inflated energy consumption to poor thermal comfort to indoor air quality problems. These are problems that regular contractors or even the best DIY homeowner cannot solve.
BPI GoldStar Contractors conduct a comprehensive energy audit to find problems, then prescribe and prioritize improvements that make your home’s system function at its best. Our goal is to help improve the comfort, health, safety, durability and energy efficiency of America’s existing homes.


Interested in becoming a BSPT HERS Rater?
The journey starts here!

  • Already a Rater?
  • Like to become an active Rater?
  • Looking for a new Provider with competitive fees?
  • Access to web based forms and file submittal?
  • In depth technical and practical support?

We offer an extensive network of web based support that streamlines our ability to answer questions and concerns that you may have. Click HERE for more information or to fill out the applicant form.


What does a HERS Rating say about a house?
The HERS Index MEASURES A HOME’S ENERGY EFFICIENCY and there are a lot of great reasons to have a home energy assessment performed on your house.
It can tell you so much about the home you live in, like how efficiently it’s operating and where you can make modifications for greater energy savings. When you’re selling your home, a low HERS rating can command a higher resale price. And when you’re buying a home you can anticipate the costs of energy bills and efficiency upgrades.

How does the HERS Index work?

  • A certified Home Energy Rater assesses the energy efficiency of a home, assigning it a relative performance score. The lower the number, the more energy efficient the home.
  • The U.S. Department of Energy has determined that a typical resale home scores 130 on the HERS Index while a standard new home is awarded a rating of 100.
  • A home with a HERS Index Score of 70 is 30% more energy efficient than a standard new home
  • A home with a HERS Index Score of 130 is 30% less energy efficient than a standard new home

Take the BPI home quiz HERE
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We are in the business of building trust. In the world of home improvement contracting, you hear a lot of misleading or downright false claims.  You can rest easy when you hire a contractor that has earned the BPI GoldStar credential, the highest standard of quality and customer service in the industry. They’re not out to sell you a product. Instead they diagnose your home’s issues using sound building science, and prescribe solutions tailored to the unique needs of your home and your budget.
All BPI GoldStar Contractors commit to employing BPI certified professionals and doing work according to BPI Standards. BPI certified professionals have passed BPI’s rigorous written and in-field practical exams that verify their knowledge and skills in building science solutions. They know how to improve energy efficiency while providing important safety functions such as mold prevention, carbon monoxide testing, and combustion appliance safety checks. They also have the know-how to help prepare your home for solar, geothermal, or other types of energy upgrades.


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