What is the Home Energy Rating System (HERS) Index?

According to the RESNET (Residential Energy Services Network) website (www.resnet.us/hers-index), the Home Energy Rating System (HERS) Index is the industry standard by which a home’s energy efficiency is measured and it’s the nationally recognized system for inspecting and calculating a home’s energy performance.

Here’s a quick video: RESNET HERS Index

To further explain, Chuck Perry, Program Manager of the North Carolina Energy Efficiency Alliance (NCEEA) housed at Appalachian State University, states that the lower the HERS score, the better the performance of the home.

“The HERS score is to the housing industry what miles per gallon is to the auto industry,” says Perry. “The score identifies a specific number to give consumers a measurement on how to gauge the performance of a home. For example, the HERS score of a typical home built in 2006 is 100. The HERS score of homes currently built by Cimarron is in the low 60s. What this means is that Cimarron homes are 35% to 40% more energy efficient than a typical home built in 2006. Furthermore, Cimarron homes are roughly 20% more energy efficient than modern-day non-certified new homes. In either comparison, Cimarron building practices produce quite accomplished results.”

The HERS score is gaining significance to the point that it’s now included on MLS sheets, says Perry. As consumers become more educated in energy efficiency, they should inquire about HERS scores to make more informed decisions regarding a home’s long term energy costs. In order to determine the HERS score of a home, a builder must hire an independent third party home energy rater to perform testing governed by RESNET.

One such RESNET-certified home energy rating company is Southern Energy Management, based locally in Morrisville. “Southern Energy Management is proud to be a part of the Cimarron legacy,” says Jamie Hager, Green Building Specialist at Southern Energy Management. “Cimarron has been one of our strongest partners from the beginning, always exploring ways to create greener, more efficient homes focused on quality. They take particular care to vet products and services that have the greatest benefit for homeowners, utilizing strategies that truly make a difference in the durabilty, security, and performance of the home. We have been independently inspecting their homes for the Energy Star and the National Green Building Standards Programs for over 10 years, and watched them lead the shift in the housing market to the construction of better homes.”

The benefit to consumers in these smart building practices is simple: Substantial savings in monthly utility bills. Cimarron can save consumers approximately $1000 or more per year on power bills, dependent on home size. Who doesn’t want to save money?


Cimarron Homes is forward-thinking with modernized technology from the cost-effective toilets to the construction of green resources. As a 47 year old single parent, I was able to finally afford my Home Sweet Home in this luxurious yet family-oriented environment. With Glennstone, you get a little bit of country, yet close to shopping amenities near the interstate; it’s just a hop, skip, and a jump away from work, play, and leisure activities.

— Lori Evanochick