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HERS Rating Certification

Posted On: 12/18/2008 6:25 PM

A home energy rating involves a detailed audit of a home's construction using thermography to view the surface temperatures inside your home. Thermography combined with blower door testing to find the leakiness of the house and duct testing to assess the leakiness of the home's ductwork.

The results of these tests are used by Paschal's HERS Raters to perform an energy analysis of the home's design and generate the HERS Index score for the home.

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.