HERS Index

The Home Energy Rating System (HERS) Index measures a home's energy efficiency by comparing its energy consumption to that of a typical new home. A lower HERS score indicates better energy performance—meaning the home uses less energy—and can lead to lower utility bills. For example, a home with a HERS score of 50 uses about half the energy of a standard new home, while a score of 100 reflects average energy use. This index helps homeowners and buyers understand a home's energy efficiency, identify potential savings, and guide improvements or choices during the purchasing process.