A HERS Rater will usually determine the score of a home using the plans, a software program called REM/Rate, and a few diagnostic tests. REM/Rate is an energy analysis program that calculates the energy consumption and costs of a home. A test called duct blasting uses pressure to determine any air leakage in the duct system and a blower door test helps identify air filtration issues of the house. The Rater will use all this information to form the HERS score. As more homes are scored, HERS will be an important part of directly comparing homes.
A HERS score is a basic requirement of most green building certifications. BuildSense’s corporate commitment is certify all homes by both the National Green Building Standard and ENERGY STAR. Besides using the HERS, a quality builder utilizing the National Green Building Standard will assure that the other systems in your home are coordinated with the air tightness and limited energy use to ensure you have a healthy and comfortable indoor environment, limit use of additional resources, and reduce the demand for long term home maintenance.
You should insist on a HERS score if you are looking at purchasing a home. In the coming years it will likely be a requirement in the real estate industry in order to clearly understand the costs associated with ownership of a particular home.
|HERS Index Chart|
|A blower door test pressurizes your home to reveal how much air is "leaking" through the various "cracks" and "holes" in your home.|
|A duct blast test pressurizes your duct work to reveal if it is "leaking"and providing conditioned air to areas like your attic or crawlspace.|