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.