RESNET Energy Smart Builders


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The Home Builders Association of Lexington Becomes First Home Builders Association to Make the RESNET HERS Index Commitment

RESNET, a Nationally recognized standards-making body for building energy efficiency rating and certification systems in the United States, has entered into a Memorandum of Understanding (MOU) with the Home Builders Association of Lexington.  The MOU is the first with a home builders association in the nation.

In the MOU, the Home Builders Association of Lexington commits to encourage all builder members to have all of their homes energy rated and market their homes' HERS Index Score.  The Energy Smart Builder commits to having all homes individually inspected and tested.  This is an exciting development for the rating industry, RESNET and the Consumer in Central Kentucky! 

RESNET Energy Smart Builders are leading the transformation of the housing towards high energy performance homes. These leading builders are committed to having all of their homes energy rated following RESNET's stringent standards and marketing their homes' HERS Index.

The RESNET HERS Index is the industry standard by which a home's energy efficiency is measured. The home energy rating system was designed by RESNET and is the nationally recognized system for the inspection and calculating a home's energy performance. Certified RESNET HERS raters have rated over 1 million homes since 1995.

For more information on the RESNET HERS Index click on HERS Index

Today's new homes are much more efficient in comparison to homes built just a decade ago. These homes are more affordable to maintain, comfortable and have a higher value. RESNET Energy Smart Builders are increasing the energy performance of the homes they build. This is good for consumers, the environment, the local economy and our national security. The use of the HERS Index will differentiate homes built by RESNET Home Energy Raters from other homes for sale in the market. Homebuilders from across the nation have already been designated as RESNET Energy Smart Builders. For a listing of RESNET Energy Smart Builders click on RESNET Energy Smart Builders

How to Become a RESNET Energy Smart Builder?

All a builder needs to do to be designated by RESNET as an Energy Smart Builder is to enter into a Memorandum of Understanding of RESNET to have all of their homes energy rated and market the homes' HERS Index. There is no cost to the builder to enter into the agreement.

HERS Rater Information

What is a HERS Rater (Home Energy Rating System Rater)?

An individual who is certified by an accredited HERS Provider to inspect and test a home in order to evaluate each of the minimum rated features established by RESNET and prepare a comprehensive HERS rating according to Chapters One and Three of the RESNET Mortgage Industry National Home Energy Rating.

What is a HERS Rating?

A home energy rating involves an analysis of a home's construction plans and onsite inspections. Based on the home's plans, the Home Energy Rater uses an energy efficiency software package to perform an energy analysis of the home's design. This analysis yields a projected, pre-construction HERS Index. Upon completion of the plan review, the rater will work with the builder to identify the energy efficiency improvements needed to ensure the house will meet ENERGY STAR performance guidelines. The rater then conducts onsite inspections, typically including a blower door test (to test the leakiness of the house) and a duct test (to test the leakiness of the ducts). Results of these tests, along with inputs derived from the plan review, are used to generate the HERS Index score for the home.


What is the HERS Index?

A scoring system established by RESNET in which a home built to the specifications of the HERS Reference Home (based on the 2006 International Energy Conservation Code) scores a HERS Index of 100, while a net zero energy home scores a HERS Index of 0. The lower a home's HERS Index, the more energy efficient it is in comparison to the HERS Reference Home. Each 1-point decrease in the HERS Index corresponds to a 1% reduction in energy consumption compared to the HERS Reference Home. Thus a home with a HERS Index of 85 is 15% more energy efficient than the HERS Reference Home and a home with a HERS Index of 80 is 20% more energy efficient.