This new ANSI standard sets the technical specifications for the inspection, testing, and labeling of a home’s HVAC system. Development of this standard was the culmination of a partnership between the Residential Energy Services Network (RESNET) and the Air Conditioning Contractors of America (ACCA).
The standard outlines five separate tasks to be performed by a HERS Rater to evaluate and grade aspects of the HVAC system’s installation and performance. These tasks are non-intrusive or have minimal impact (make a hole for a static pressure probe). Additionally, each task has an alternate compliance path that allows an independent verification report to provide the necessary information.
The standard’s five tasks consist of two prerequisite tasks that must be passed before the process can continue, and three functions that contribute to the HERS / ERI score improvement.
The critical question is, what will be the impact of the above standard on the HERS or ERI scores? The calculations to determine the effect of these measurements are under development by another committee. This standard focuses on forced-air cooling and heat pump heating; therefore, climates, which are cooling dominant or regions that use heat pumps, will see the potential to lower (improve) their HERS Index / ERI scores.
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