For new construction low rise residential buildings (3 stories or less), the Stretch Energy Code requires a “HERS” Index Rating of the building. What is a “HERS” Index Rating?
The term “HERS” stands for Home Energy Rating System. The HERS index scores a home on a scale from 0-100 where 0 is a zero-net-energy home, and 100 is a code compliant new home (currently based on the IECC 2006 code). The HERS index has been in use for many years by “beyond code programs” such as Energy Star Homes, and LEED for Homes, and by the Federal IRS for tax credits and energy efficient mortgages. HERS index ratings are performed by an independent HERS rater, working with the home builder, and then submitted to the local building code official. The Stretch Energy Code requires a HERS index of 65 or less for new homes of 3,000 square feet or above, and 70 or less for new homes below 3,000 square feet (this includes multi-family units in buildings of 3 stories or less). A HERS index of 65 means that the home is estimated to use 65% as much energy as the same home built to the 2006 International Energy Conservation Code, or a 35% annual energy savings.
