HERS Services | H.E.R.S. Services | HERS Measures | H.E.R.S. Measures |
Duct Testing | Duct Leakage Test | Blower Door Test | EER | QII | TXV |
Energy Audit | State Energy Audits | EEM Energy Audit | Watt Draw |
Title 24 Compliance Verifications | LEED | H.E.R.S. Rater Verification |

San Diego HERS Raters | Carlsbad HERS Raters | Cardiff HERS Raters |
Encinitas HERS Raters | La Costa HERS Raters | Solana Beach HERS Raters |
Oceanside HERS Raters | Ranch Sante Fe HERS Raters | La Jolla HERS Raters |
San Marcos HERS Raters | Escondido HERS Raters | Del Mar HERS Raters |

What is a H.E.R.S. Rating?

A Home Energy Rating System 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.

The HERS Index

The HERS Index is a scoring system established by the Residential Energy Services Network (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.