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A Lower HERS Index Score Means a More Energy Efficient Home

An energy efficient home conforming to the 2004/2006 International Energy Conservation Code (IECC) has a HERS Index Score of 100. This means homes with lower scores are more energy efficient while those with higher scores are not energy efficient. The U.S. Department of Energy has determined that a typical resale home scores 130 on the HERS Index.