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HERS Rater's Responsibility for Verifying ENERGY STAR® v2 HVAC Sizing Requirements Back To Articles


Manual J HERS Rater ENERGY STAR load calculations

To meet ENERGY STAR v2 qualification, when cooling equipment is installed in the home, the system must be sized properly and the load calculation must meet certain requirements such as correct indoor and outdoor design temperatures, infiltration set at tight, etc. It is the HERS Rater's responsibility to review the load calculation and ensure that the system installed meets the ENERGY STAR equipment sizing requirements.


Although this process may seem complicated to a Rater unfamiliar with load calculations,  fear not; The BER has created a step-by-step guide for HERS Raters to better understand their responsibility for verifying ENERGY STAR v2 HVAC sizing requirements and how to perform the verification.


To do this, the Rater must collect the load calculation report from the contractor or perform the calculation if hired by the builder to do so. Also, for split systems, the indoor and outdoor coils must be matched in accordance with AHRI Standards. To confirm that this requirement has been met, the Rater may either collect the AHRI match certificate from the HVAC contractor, or download the report at the AHRI Directory.


The following segments are intended to guide HERS Raters on how to better understand their responsibility for verifying ENERGY STAR v2 HVAC sizing requirements and how to perform the verification.


ENERGY STAR v2


ENERGY STAR Qualified Homes National Performance Path Note #7 defines the HERS Rater’s responsibility in checking the documentation for both the Manual J and S or equivalent computation procedure. Following the note we will highlight and examine some key points. We also encourage Raters to examine the complete ENERGY STAR Qualified Homes National Performance Path Requirements, available here.


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