This will help facilitate comparison, design and operation improvements and development of building energy performance standards.
ASHRAE announced the release of ANSI/ASHRAE Standard 105-2007, Standard
Methods of Measuring, Expressing and Comparing Building Energy
Performance, which provides a method of energy performance comparison
that can be used for any building, proposed or existing, and that
allows different methods of energy analysis to be compared.
This will help facilitate comparison, design and operation improvements
and development of building energy performance standards, according to
J. Michael MacDonald, chair of the committee that wrote the standard.
“ASHRAE is working to advance the development and understanding of
these advanced building performance comparison methods,” he said. “This
standard provides a framework for assuring access by all interested
parties to performance comparison or rating methods that are developed.”
The biggest change to the standard, last published in 1999, is
inclusion of building energy performance comparison, which is vital for
energy efficiency efforts worldwide, he said. Past versions of the
standard provided a basis for reporting energy use but had limited
ability to express or compare performance.
MacDonald noted that existing standards and building rating systems
include requirements related to energy performance comparison.
MacDonald said the guidance in the standard progresses from energy use
index (total annual energy use per sq ft) to other indexes, such as
energy use per hospital bed, and then to performance comparison
frameworks. The standard also identifies key characteristics that users
should consider reporting when performance comparisons are of interest,
such as the number of workers, weekly hours of operation, and annual
cooling and heating degree-days.
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