Which organization oversees the HERS rating system?

RESNET (Residential Energy Services Network) is the organization that oversees the HERS rating system. RESNET was established to develop energy efficiency standards and protocols for rating home energy performance, which includes the creation and maintenance of the HERS Index. This index is a measurement system that quantifies a home's energy efficiency level and provides valuable insights for builders, homeowners, and energy raters. RESNET provides training and certification for raters, ensuring standardized practices across the industry to promote energy efficiency in residential buildings.

The other organizations listed, while important in their fields, focus on different aspects of energy use or building standards. ASHRAE specializes in heating, ventilation, and air conditioning systems, and while they contribute to standards for efficient building practices, they do not oversee the HERS rating system. The EPA focuses primarily on environmental protection and may promote energy efficiency initiatives, but it does not govern the HERS framework. Similarly, NAHB is involved in advocating for builders and housing issues, but it also does not have control over the HERS rating methodology. Thus, RESNET’s role is critical and central to the implementation and management of the HERS rating system.