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HERS  (Home Energy Rating System) Ratings


The HERS Index is a standardized energy performance assessment of a home – much like the MPG rating for cars.  HERS standards also define a nationally recognized and ANSI accredited methodology for inspecting, testing and calculating home energy performance.

The HERS Index can be a useful “stand-alone” tool for evaluating the energy efficiency and improvement potential of any existing home, or the plans for a new one.  In new construction, it can be used to demonstrate code compliance (IECC 2015 or higher) or eligibility for above-code programs such as Enterprise Green Communities, LEED for Homes, ENERGY STAR Certified Homes and DOE

Zero Energy Ready.  But its value lies not just as a model for calculating performance – inspections during the construction process provide an invaluable opportunity for your HERS Rater to work with you and your design and construction teams to help ensure that each home or building will meet its performance targets.

Additionally, the HERS Index provides an excellent mechanism for marketing the superior performance of your homes or residential units, and educating your customers using resources available from the Residential Energy Services Network (RESNET) like the video included here.

As a RESNET accredited Home Energy Rating Provider, MaGrann Associates is responsible for meeting rigorous Quality Assurance and certification requirements for our raters and rating activities.  And with more than 60,000 rated homes and apartments under our belt we are one of the most experienced rating companies in the country – particularly in multifamily construction – and one of the few backed up by the resources of a professional engineering company.​

No other construction professional looks at so many different aspects of a home or building to give you a complete picture of its quality and performance:





   Envelope and duct leakage

   Heating & air conditioning systems

   Ventilation systems

   Windows & doors

   And more!

Back to Green Building Certifications
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