Understanding HERS Rating in MA: A Comprehensive Guide for Homeowners

A colorized chart showing the relative energy costs for a typical existing home (red), a new home (orange), and a zero energy new home (green)

Understanding HERS Rating in MA: A Comprehensive Guide for Homeowners

Home Energy Rating System (HERS) has become a crucial factor in the realm of energy-efficient homes, especially in Massachusetts. As the demand for sustainable living increases, homeowners are increasingly interested in improving the energy efficiency of their homes. In this blog post, we’ll delve into the significance of HERS rating in Massachusetts and explore how it can benefit homeowners.

What is HERS Rating?

The Home Energy Rating System (HERS) is a nationally recognized standard for measuring the energy performance of residential buildings. In Massachusetts, HERS ratings are conducted by certified professionals who evaluate various aspects of a home’s energy usage, such as insulation, windows, HVAC systems, and overall construction.

Importance of HERS Rating in Massachusetts

1. Building Code Compliance

Massachusetts has strict energy efficiency requirements for residential buildings. HERS ratings play a crucial role in ensuring compliance with these codes. A lower HERS score indicates higher energy efficiency, making it easier for homeowners to meet or exceed the state’s building energy performance standards.

2. Energy Savings

HERS ratings help homeowners identify areas of their homes that can be improved for increased energy efficiency. By implementing the recommendations provided in the HERS report, homeowners can significantly reduce their energy consumption, leading to lower utility bills and long-term savings.

3. Home Value and Marketability

As the demand for energy-efficient homes grows, having a low HERS rating can enhance the market value of a property. Potential buyers are increasingly considering the energy efficiency of a home as a key factor in their decision-making process. A lower HERS score can make a property more attractive and marketable in Massachusetts’ competitive real estate market.

The HERS Process

  1. Initial Assessment: Certified HERS raters conduct a thorough assessment of the home, considering factors such as insulation, air leakage, and HVAC efficiency.

  2. Energy Modeling: Using advanced software, raters create an energy model that simulates the home’s energy performance. This helps identify areas for improvement.

  3. Recommendations: The HERS report provides detailed recommendations for enhancing energy efficiency. This may include upgrading insulation, sealing air leaks, or upgrading to more energy-efficient appliances.

  4. Verification and Certification: After implementing the recommended improvements, a final HERS rating is conducted to verify the changes. The home is then awarded a certified HERS rating.

How to Improve Your HERS Score

  1. Upgrade Insulation: Adding or improving insulation in walls, attics, and basements can significantly reduce energy loss.

  2. Seal Air Leaks: Addressing drafts and air leaks through weatherstripping, caulking, and proper sealing can enhance energy efficiency.

  3. Upgrade HVAC Systems: Installing energy-efficient heating, ventilation, and air conditioning (HVAC) systems can contribute to a lower HERS rating.

  4. Energy-Efficient Windows and Doors: Upgrading to windows and doors with high energy performance ratings can improve overall efficiency.


In Massachusetts, HERS rating has become a valuable tool for homeowners seeking to enhance their homes’ energy efficiency, comply with building codes, and increase market value. By understanding the importance of HERS ratings and taking steps to improve energy performance, homeowners can enjoy a more comfortable living space while contributing to a more sustainable future.

For professional assistance with HERS ratings in Massachusetts, contact KMA or a certified energy efficiency experts who can guide you through the process and help you achieve a lower HERS score for your home.