The SRP ENERGY STAR® Homes program uses the Home Energy Rating System (HERS) Index to measure the efficiency of every new home in the program. Developed by the Residential Energy Services Network (RESNET), the HERS Index is the industry standard by which a home's energy efficiency is measured and the nationally recognized system for inspecting and calculating a home's energy performance.
A certified RESNET Home Energy Rater enters each home's specific characteristics into a computer program that simulates the home's energy use. The home receives a score between 100 and 0 based on its performance. A lower number represents a more energy-efficient home.
The U.S. Department of Energy has determined that a typical resale home scores 130 on the HERS Index, while a standard new home is awarded a rating of 100. Therefore, a home that scores 70 on the HERS Index is 30% MORE energy efficient than a standard new home. Most homes in the SRP ENERGY STAR Homes program score 70 or less on the HERS Index.
Build your knowledge about the HERS index
To learn more, review RESNET's Interactive HERS Index Demonstration or watch this interactive video to better understand the HERS Index.