Home Energy Rating System

Through the Home Energy Rating System Program (HERS), the energy efficiency of a home is measured on the basis of 1 to 5 stars (with stars representing the most energy efficient). A 4 or 5 stars rating indicates that the home meets or exceeds the 1993 Model Energy Code and homebuyers can use an energy efficient mortgage (EEM) to stretch their debt-to-income ratio. All of the homes entered in the Energy Rated Homes Tour score at least 4 stars.

To have a home rated, an independent, state certified rater must be hired to inspect the home. During the rating inspection, the rater will collect data on the efficiency levels of the water heater, heating and cooling systems, insulation (in crawl, basement, walls, attic, etc.) windows/doors, lighting, the air-tightness of the home, and ductwork system (by conducting a blower door test). This information is sent to the Office of Energy Policy where it is analyzed through the REM/RATE energy software program.

A rating certificate, rating packet, and letter from the Department of Commerce (indicating the home exceeds energy efficiency standards and can be sold using an energy efficient mortgage will be issued for 4 and 5 star homes. If the home scores below 4 stars, an energy improvement worksheet will be issued detailing how the home can be most cost-effectively improved to attain the 4 star rating.