[Report] Framework for Comparing Energy Rating Systems

26-04-2013 | United States美国

Today the GBPN and its US Hub, the Institute for Market Transformation (IMT) released a new report, "Comparing Building Energy Performance Measurement".

This paper, by IMT Project Manager David Leipziger, proposes a classification for energy performance systems, analyzing 17 different systems in 10 countries, and clarifies the different meanings and implications behind commonly used terms. 

Building energy performance is a measure of efficiency, but diverse measures of performance are used around the world, and they are largely local in application. Overall, there is a lack of understanding of how building energy efficiency compares across markets. In the globalized world, this kind of comparison is increasingly useful for regions to compare building performance and exchange best practices. 
The goal of the report is not standardization of systems but rather a standard framework of comparison, a common set of terms and characteristics that can explain any system. This framework will be highly relevant to researchers, real estate companies, and institutional investors.
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The features of an energy efficiency assessment including the nature of comparison, energy use assessment method and building inputs. An energy rating’s terms of comparison can be relative to other buildings or to an absolute score (ie. technical or statistical) its energy use assessment method either based on forecasted consumption (asset/calculated/predictive) or actual consumption (operational/measured/performance-based); individualized building inputs can use either standardized or customized (standard or tailored) values. [Source: Institute for Market Transformation]

The ratio between the energy services provided and the energy consumed. Something is more energy efficient if it delivers more services for the same energy input, or the same services for less energy input. [Source: IEA Glossary]

The calculated or measured amount of energy needed to meet the energy demand associated with a typical use of the buildings, which includes inter alia, energy used for heating, cooling, ventilation, hot water and lighting (EU). [Source: EPBD recast, 2010/31/EU]

Rating and disclosure refers to the practice of evaluating the relative energy efficiency of a home or building and making this information known to consumers. The mechanism aims to raise consumer awareness about energy performance of and encourage building energy improvements through greater market transparency. [Source: Institute for Market Transformation]