RESNET developed the Home Energy Rating System (HERS), which is the nationally recognized standard for inspecting and calculating a home’s energy performance. The lower the HERS Index rating, the more energy efficient the home is, and therefore, the more electricity cost savings the homeowner receives.
Much like a car’s MPG sticker, the HERS Index gives you an idea of how much your home is costing you. Energy-efficient homes have lower scores and cost a lot less to run. Homes that are energy guzzlers have higher scores that you’ll feel each time you open your energy bill.
Nationally, a typical new home (HERS Reference Home) is assigned a rating of 100 on the HERS Index, while a typical resale home (HERS Existing Home) is assigned a rating of 130. Comparatively, all LifeStyle SunSmart℠ homes are guaranteed to have a HERS Index rating of 60 or lower. Meanwhile, all LifeStyle solar-powered homes that achieve a zero-energy performance will have a HERS Index rating of 0 or lower.
WHAT THIS MEANS FOR YOU
A score of 60 on the HERS Index means that you should expect your annual energy bill to be 40% less than it would be if you bought a similar-sized new home, and 70% less than it would be if you bought a similar-sized used home.
SIDE-BY-SIDE SAVINGS COMPARISON
Consider this side-by-side savings of a LifeStyle SunSmart℠ home compared to a typical used home and typical new home. (Estimates based on a four-bedroom, three-bathroom, 2,400 square-foot home. Actual electricity costs may vary depending on family size and lifestyle.)