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The Residential Energy Services Network (RESNET) was founded in 1995 as an independent, non-profit organization committed to helping homeowners reduce the cost of their utility bills by making their homes more energy efficient.

RESNET is responsible for creating the national training and certification standards for HERS Raters and Home Energy Survey Professionals, both of which are recognized by federal government agencies such as the U.S. Department of Energy, the U.S. Environmental Protection Agency and the U.S. mortgage industry.

In order to qualify for RESNET certification, home energy professionals must first complete the rigorous training required to meet the high standards of excellence demanded by RESNET and agree to abide by the RESNET Code of Conduct.

RESNET is a member of the United Nations Sustainable Buildings and Climate Initiative. For more information on RESNET, visit www.resnet.us.


The VISION House in INNOVENTIONS has a *projected HERS Index Score of 0, which means that it produces as much energy as it uses.

The HERS Index Score is like a miles-per-gallon (MPG) sticker for houses. It gives prospective buyers and homeowners an insight as to how the home ranks in terms of energy efficiency.

Developed by RESNET and introduced in 2006, the HERS Index is the industry standard by which a home's energy efficiency is measured. It is recognized by government agencies such as the Department of Energy, the Department of Housing and Urban Development, and the Environmental Protection Agency.

To get a HERS Index Score, a home must be rated by a certified RESNET home energy rater, who will compare the data against a 'reference home' – a design modeled home of the same size and shape as the actual home. Therefore, the HERS Index Score is always relative to the size, shape and type of house you live in. The lower the number - the more energy efficient the home.

  • A home with a HERS Index Score of 0 is one that produces as much energy as it uses. 
  • 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 rated at 100.
  • A home with a HERS Index Score of 70 is 30% more energy efficient than a standard new home.
  • A home with a HERS Index Score of 130 is 30% less energy efficient than a standard new home.
 *The VISION House  in INNOVENTIONS is an exhibit, which is why its HERS Index Score is a projected one.


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