Making Energy Efficient Choices

The Center for EcoTechnology’s Green Building Services team has performed over 2,000 Home Energy (HERS) Ratings. You can rely on CET to help you make energy efficient choices for your next residential new construction project. Contact us for a Home Energy Rating before construction begins and we will help you make an energy efficiency plan that makes sense for you.

Read our Home Energy Rating Step-by-Step Guide

Contact us today:
413-586-7350 x242

Why get a Home Energy Rating?

  • Required in Massachusetts towns with the stretch energy code
  • Qualify for utility incentives for new construction
  • First step towards ENERGY STAR certification
  • Get unbiased advice and helpful third-party testing and inspections


Massachusetts Program Incentives
Contact us today for up to date information on current Mass Save incentives: 413-586-7350 x 242 or email

Update! Learn more about the 2014 Builders’ Tax Credit.

What is a Home Energy Rating?

Home Energy Rating Index

The lower the HERS index the more energy efficient the home

The Home Energy Rating System (HERS) was developed nationally with guidelines from Fannie Mae and Freddie Mac to provide uniform, reliable, unbiased information to home buyers, sellers, realtors, and the mortgage industry about the energy efficiency of any home. A HERS report contains data obtained by a certified HERS rater during the examination of a home or the building plans, such as the insulation levels, solar orientation, heating, cooling, ventilation systems and controls, appliance efficiency, and window types. The rating is an “index” score between 0 and several hundred, with a lower score indicating lower annual energy consumption and 100 representing a “typical” new home built with minimum code compliance.  Homes built before the current code are typically rated above 100.

The Center for EcoTechnology is an accredited HERS provider, an organization that uses approved national guidelines to complete HERS ratings on homes. Nationally, HERS providers use a fixed set of procedures, assumptions, measurements, and calculations to provide a home ener­gy rating.

A Certified HERS Rater has had training in the Home Energy Rating System procedures and software, has passed the national certification exam, and has performed a minimum of five ratings under the guidance of a quality assurance designee of their HERS provider. The rater does a visual inspection of the house and collects data using a number of energy measurement tools including a blower door, infrared camera, and duct blaster (if applicable).