The Home Energy Rating System (HERS) Index is the industry standard by which a home’s energy efficiency is measured. Each Hardison Building home is tested with an average efficiency of more than 30% than most homes. Why is this important to you? Because it allows you to save more on utility bills and improve the comfort of your home. You will notice more even temperatures throughout the home with effective air distribution and regulated humidity. The ability of a home to reduce its carbon footprint while allowing you enjoy your investment is environmentally responsible.