For Release:
Nov.1 , 2011
Contact: Jodi Scott
Public Relations
678-539-1140
DOE Updates National Reference Standard for Commercial
Buildings to 90.1-2010
ATLANTA – Following preliminary analysis that
ASHRAE/IES’s 2010 energy efficiency standard contains significant energy
savings over the 2007 standard – 18.2 percent source energy savings and 18.5
site energy savings – the U.S. Department of Energy (DOE) has issued a ruling
that establishes the 2010 standard as the commercial building reference
standard for state building energy codes.
In an announcement in the Oct. 19 edition of The Federal
Register, DOE attributes the greater energy savings to improvements in
ANSI/ASHRAE/IESNA Standard 90.1-2010, Energy Standard for Buildings Except
Low-Rise Residential Buildings, related to better lighting, daylighting,
controls and building envelope and better mechanical systems and application to
more systems.
With the Oct. 19 ruling, Standard 90.1-2010 serves as the
commercial building reference standard for state building energy codes under
the federal Energy Conservation and Production Act. As a result, states are required to certify
by Oct. 18, 2013, that they have updated the provisions of their commercial
building code regarding energy efficiency to meet or exceed 90.1-2010.
“The foundation of energy efficient buildings continues
to grow stronger with the news that DOE is now referencing the 2010 standard,”
Ron Jarnagin, ASHRAE president, said. “ASHRAE hopes to make that foundation
even stronger through our current work with IES developing the 2013 standard.”
“The DOE has determined that the quantitative analysis of
the energy consumption of buildings built to Standard 90.1-2010, as compared to
buildings built to Standard 90.1-2007, indicates national source energy savings
of approximately 18.2 percent of commercial building consumption,” according to
DOE. “Additionally, DOE has determined site energy savings are estimated to be
approximately 18.5 percent.”
The DOE noted that the newer version of the standard
contains 19 positive impacts on energy efficiency. These impacts included
changes made through the public review process in which users of the standard
comment and offer guidance on proposed requirements. Specifically the positive
impacts include:
•
Requirements for daylighting controls under skylights and commissioning
of daylighting controls; increased use of heat recovery; cool roofs in hot
climates; lower illuminance in certain exterior zones; skylights and
daylighting in some building types; reduced ventilation energy; supply air
temperature reset for non-peak conditions; efficiency requirements for data
centers; lower lighting power densities; control of exterior lighting;
occupancy sensor for many specific applications; daylighting control
requirements for side-lighted spaces; and daylighting controls in more spaces.
• Updated
chiller efficiency requirements.
• Extension
of VAV fan control requirements.
• Expansion
of new lighting power densities to more retrofits and automatic damper
requirements and use of economizers
• Minimizes
exceptions to switched receptacle requirement.
The ruling comes on the heels of a July announcement that
established the 2007 standard as the as the commercial building reference
standard for state building energy codes. The DOE noted that because the 2010
determination was published prior to the two-year deadline states have to
demonstrate that their energy code meets or exceeds the stringency of the 2007
standard, states are allowed to file just one certification to address both
determinations.
Since being developed in response to the energy crisis in
the 1970s, Standard 90.1 now influences building designs worldwide. It has
become the basis for building codes, and the standard for building design and
construction throughout the United States. ASHRAE and IES publish a revised
version of the standard every three years.
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