top of page
  • Writer's pictureCertified Energy Raters

The Role of a HERS Rater - Part 1

1. Introduction to HERS Raters

HERS Rater

HERS Raters play a crucial role in assessing and promoting energy efficiency in buildings. With the increasing emphasis on sustainable construction and energy conservation, HERS (Home Energy Rating System) Raters have become indispensable in evaluating the energy performance of residential and commercial buildings. In this article, we will explore the responsibilities of HERS Raters, the HERS rating process, and the benefits of hiring them. Additionally, we will discuss their collaboration with architects and builders, their involvement in green building certifications, the required training and qualifications, and the future trends and challenges they face. Join us as we delve into the world of HERS Raters and their significant impact on creating energy-efficient spaces.

Introduction to HERS Raters

What is a HERS Rater?

A HERS Rater, short for Home Energy Rating System Rater, is a professional who assesses the energy performance of homes. They play a crucial role in helping homeowners and builders understand the energy efficiency of a property.

History and Evolution of HERS Ratings

HERS Ratings have been around since the 1990s when energy conservation became a key concern. The system was created by the Residential Energy Services Network (RESNET) to provide a standardized and comprehensive way to measure the energy efficiency of homes. Over the years, HERS Ratings have evolved, incorporating advancements in technology and building science to provide more accurate assessments.

Role and Responsibilities of HERS Raters

Evaluating Energy Performance

HERS Raters evaluate the energy performance of homes by conducting a series of tests and inspections. They assess factors such as insulation levels, air leakage, ductwork efficiency, and the performance of heating, ventilation, and air conditioning (HVAC) systems.

Conducting Energy Audits

Energy audits are a crucial part of a HERS Rater's responsibilities. They identify areas of inefficiency and potential energy-saving improvements. By using specialized equipment like blower doors and thermal imaging cameras, HERS Raters can pinpoint areas where energy is being wasted.

Providing Energy Efficiency Recommendations

Based on their evaluation and energy audit findings, HERS Raters provide homeowners and builders with detailed recommendations on how to improve energy efficiency. They suggest upgrades such as adding insulation, sealing air leaks, upgrading HVAC systems, or installing energy-efficient appliances.

HERS Rating Process and Certification

Overview of the HERS Rating Process

The HERS rating process typically involves an initial inspection, diagnostic testing, and a final rating. During the inspection, the HERS Rater examines various aspects of the home's construction and energy systems. Diagnostic testing includes measuring air leakage, duct leakage, and performing airflow tests. The final rating is given on the HERS Index, which compares the energy performance of the home to a standard reference home.

HERS Rating Certification Requirements

To become a certified HERS Rater, professionals undergo rigorous training and must pass exams to demonstrate their knowledge and expertise. Certification ensures that HERS Raters are qualified to accurately evaluate and rate the energy efficiency of homes.

Understanding HERS Index Scores

The HERS Index is a widely recognized metric used to compare the energy efficiency of homes. A lower HERS Index score indicates a more energy-efficient home, while a higher score suggests a less efficient one. For example, a HERS Index score of 50 means the home is 50% more energy-efficient than the reference home, while a score of 150 means the home is 50% less efficient.

Benefits of Hiring a HERS Rater

Increased Energy Efficiency

By hiring a HERS Rater, homeowners and builders can gain valuable insights into the energy performance of a home. This allows for targeted improvements that can significantly increase energy efficiency and reduce utility bills.

Potential Cost Saving

Improved energy efficiency can lead to substantial cost savings in the long run. By implementing the recommendations provided by a HERS Rater, homeowners can reduce energy consumption, resulting in lower utility bills and increased resale value.


What is the role of a HERS Rater?

HERS Raters are responsible for evaluating the energy performance of buildings. They conduct energy audits, perform diagnostic tests, and provide recommendations for enhancing energy efficiency. Their role is crucial in helping homeowners, builders, and architects make informed decisions to reduce energy consumption and improve sustainability.

How does the HERS rating process work?

The HERS rating process involves a comprehensive evaluation of a building's energy performance. HERS Raters use specialized tools and techniques to assess various aspects, including insulation, air leakage, heating and cooling systems, and lighting efficiency. They assign a HERS Index score, which indicates the relative energy efficiency of the building compared to a reference home. Lower scores indicate higher energy efficiency.

Why should I hire a HERS Rater?

Hiring a HERS Rater offers numerous benefits. They can help identify energy-saving opportunities that may otherwise go unnoticed, resulting in lower energy bills and increased comfort. Additionally, their expertise can assist in achieving green building certifications, such as LEED or ENERGY STAR. Overall, a HERS Rater's guidance can lead to long-term cost savings, improved indoor air quality, and reduced environmental impact.

34 views0 comments


bottom of page