HERS Index

Most Homes Are NOT Energy Efficient

Most homes today, even those being built, are NOT energy efficient. So how can you tell?

To help compare homes objectively, the Residential Energy Services Network (RESNET) created a scoring system called the Home Energy Rating System (HERS) Index.

They used a Reference Home built to meet the 2004 International Energy Conservation Code as a benchmark and gave it a score of 100. They gave a net zero energy home a score of 0. Many homes are so inefficient, they score in the hundreds!

The Lower the Better

The lower a home scores on the Index, the more energy efficient it is. Every 1-point decrease in the HERS Index equals a 1% reduction in energy consumption compared to the Reference Home. A few of the items raters test include:

  • Insulation (amount & quality of installation)
  • Ventilation (indoor air quality)
  • Tightness (air sealing)
  • Heating and cooling systems (are they sized right?)
  • Water heater efficiency
  • Solar gain (free solar energy!)

Both Energy Star® 3.0 homes and homes that meet the National Builders' Challenge Program must now score 70 or less on the Index. That makes them 30% more energy efficient than the Reference Home! See how much that can save you using the Builders Challenge E-Scale Interactive Tool, which is also based on the HERS Index.

We Know the Score

The average HERS Index score of all the homes we built in 2011 was 46! Check to see how much that saves by trying this Interactive Index!

Our Homes Perform

 Every home Stitt Energy Systems builds is tested by a certified RESNET Home Energy Rater to meet or exceed Energy Star® and Builders Challenge standards.

That guarantees the home we design and build for you will be beautiful, durable, structurally resilient, healthy to live in, plus energy and resource efficient!