For Release:
Jan. 30, 2012
Contact: Jodi Scott
Public Relations
678-539-1140
Standard Features Energy Savings
2011 version of the Green Standard Now Available from
ASHRAE, USGBC, IES
ATLANTA – Changes to help make buildings and systems more
sustainable are part of the newly published version of the high performance
green building standard from ASHRAE, the U.S. Green Building Council (USGBC)
and the Illuminating Engineering Society (IES)
ANSI/ASHRAE/USGBC/IES Standard 189.1-2011, Standard for
the Design of High-Performance, Green Buildings Except Low-Rise Residential
Buildings, provides a green building foundation for those who strive to design,
build and operate high performance buildings. It covers key topic areas of site
sustainability, water-use efficiency, energy ef¬ficiency, indoor environmental
quality and the building’s impact on the atmosphere, materials and
resources. When first introduced in
2009, the standard was the first code-intended commercial green building
standard in the United States.
“Since Standard 189.1 was first published, we have
received much input from the industry offering suggestions on how to strengthen
it in all areas,” chair Dennis Stanke said. “This 2011 version incorporates
much of that input. More importantly, the 2011 version incorporates updated connections
to its referenced standards – primarily ANSI/ASHRAE/IES 90.1-2010 and
ANSI/ASHRAE 62.1-2010. Compliance with these updated provisions will result in
further improvements to indoor environmental quality, while further reducing
energy use and environmental impact through high-performance building design,
construction and operation.”
The most significant change in energy-related provisions
results from new requirements in ANSI/ASHRAE/IES Standard 90.1-2010, Energy
Standard for Buildings Except Low-Rise Residential Buildings, adding to and
superseding requirements in the 2007 version. In October 2011, the U.S.
Department of Energy found that the 2010 version of Standard 90.1 contains
significant energy savings over the 2007 standard. The energy savings in the
Standard 90.1-2010 provisions also result in energy savings for building
projects complying with Standard 189.1, according to Stanke.
In addition, mandatory and prescriptive renewable energy
requirements were clarified to reduce confusion and simplify calculations; now
both mandatory provisions to prepare for on-site renewable energy and
provisions to produce prescribed levels of renewable energy must be met.
Additionally, buildings that meet the prescriptive requirement for renewable
energy production are now deemed to comply with the mandatory requirement for
renewable energy site-preparation.
The standard also updates the performance option for
energy efficiency (Appendix D) so that it refers to Appendix G of Standard
90.1-2010, which is now a normative appendix. Appendix G of 90.1 applies to
projects seeking to reduce annual energy cost more than would be possible by
merely meeting the requirements of that standard. Appendix D in Standard 189.1, on the other
hand, provides a performance option for compliance as an alternative to the
less-complex prescriptive option; it must show that the project design results
in annual energy cost equal to or less than would be possible by meeting the
mandatory plus prescriptive requirements of the standard, according to Stanke.
Additional changes to the 2011 standard include:
• More
stringent Lighting Power Density allowances due to the change in reference to
Standard 90.1-2010. Both interior and
exterior values are now set as a percentage of the Standard 90.1 allowances,
based on building, space or area type.
• Automatic
controls are now required for lighted signs visible during daytime hours;
controls must reduce the lighting power to 35 percent of full power. For other
outdoor signs, automatic controls must now turn off lighting during daytime
hours and reduce the lighting power to 70 percent of full power after midnight.
•
Open-graded (uniformed size) aggregate and porous pavers (e.g.,
open-grid pavers) qualify as a hardscape surface for heat island mitigation
with no further testing. Permeable
pavement and permeable pavers must meet a minimum percolation rate rather than
a minimum solar reflectance index (SRI).
Standard 189.1 is currently a jurisdictional compliance
option in the International Green Construction Code developed by the
International Code Council, ASTM International and the American Institute of
Architects.
The cost of ANSI/ASHRAE/USGBC/IES Standard 189.1-2011,
Standard for the Design of High-Performance, Green Buildings Except Low-Rise
Residential Buildings, $119 ($99 ASHRAE members).
To order, contact ASHRAE Customer Contact Center at
1-800-527-4723 (United States and Canada) or 404-636-8400 (worldwide), fax
404-321-5478, or visit www.ashrae.org/bookstore.
