HERS H2O and WaterSense
RESNET’s Water Efficiency Rating System HERS H2O®
HERSH2O® builds off RESNET’s nationally recognized Home Energy Rating System (HERS®) Index, which is the gold standard for rating the energy efficiency of a home. HERSH2O® is a system for rating whole-house water efficiency that includes both indoor and outdoor uses. With the average family spending more than $1,000 annually on water costs, HERSH2O® provides a simple, easy-to-compare rating on a scale of 0-100+; where lower numbers mean less water use.
Builders that are already having their homes HERS® Rated, can easily add a HERSH2O® Rating.
EPA's WaterSense
RESNET is a WaterSense Home Certification Organization (HCO) and HERSH2O® is a WaterSense Approved Certification Methodology. This means builders now have a performance-based approach to achieving the WaterSense label for their homes. By achieving a HERSH2O® score of 70 or less and meeting a few simple requirements, builders can label their homes as WaterSense certified.