PerformanceUp to date · Jan 15, 2026
HERS Index (Home Energy Rating System)
A scoring system from 0-150+ that rates a home's energy efficiency. A HERS Index of 100 equals the reference home; lower scores are more efficient. A net-zero home scores 0.
Why It Matters
A HERS rating is the "MPG sticker" for homes. A typical new home scores 50-70; an existing home 80-130. Buyers increasingly look at HERS scores when comparing homes.
Related Terms
Energy Audit
A professional assessment of a home's energy performance, including blower door testing, thermal imaging, duct leakage testing, insulation evaluation, and appliance efficiency review.
ENERGY STAR
A U.S. EPA/DOE program that certifies products meeting energy efficiency standards above federal minimums. ENERGY STAR products use 10-50% less energy than standard models.