For a number of years, owners and designers of commercial
buildings in California have turned to two programs-Energy Design
Resources and Savings By Design-for information, design assistance
and incentives to help them save money, reduce energy use and
related carbon dioxide emissions, and improve the quality of their
buildings. This issue of e-News focuses on how owners and design
teams can further benefit by using EDR and SBD resources and
services to help achieve LEED certification.
With growing numbers of owners and design teams pursuing LEED
ratings for their California buildings, the utilities who
administer EDR recognized the need for an effortless means of
linking EDR's resources to the LEED framework. The result is a new
enhancement to the EDR website called Applying LEED.
With just a few clicks of the mouse, you can use this web portal
to look up a specific LEED prerequisite or credit and view all the
relevant EDR resources-including design guides and design briefs,
case studies, e-newsletters, software and other online tools.
If you are a developer or building owner who is evaluating high
performance strategies such as integrated design, renewable energy
systems or building commissioning, you can use Applying LEED to
quickly find out about other projects that have employed similar
strategies. Architects, engineers and other building professionals
who are researching options for achieving particular LEED
credits-such as Optimize Energy Performance (EA Credit 1) or
Enhanced Refrigerant Management (EA Credit 4)-can use Applying LEED
to access a wealth of technical information and design
Even if your team is not pursuing LEED certification for a
particular project, Applying LEED is a valuable gateway when
researching energy efficient and sustainable options for your
building's design, construction and operation. Keep in mind that
all the resources available through Applying LEED are also
accessible via EDR's home page; Applying LEED merely presents EDR's
resources in a handy format that reflects the LEED framework.
LEED for New Construction and Major Renovations (LEED-NC version
2.2) awards credits based on six performance categories:
Sustainable Sites, Water Efficiency, Energy and Atmosphere,
Materials and Resources, Indoor Environmental Quality, and
Innovation and Design Process (see Figure 1). Each of these
categories is listed on Applying LEED's main web page.
Figure 1. The LEED-NC Rating System
consists of 69 performance benchmarks ("credits") in 6 categories.
Energy & Atmosphere accounts for 25 percent of potential
Since EDR's resources emphasize energy efficiency, they offer
valuable support to project teams who are researching strategies to
achieve LEED Energy and Atmosphere credits. Many EDR resources also
address other sustainable design strategies, such as integrated
design and indoor air quality, and therefore can also support the
project team's efforts to earn LEED credits in other
Figure 2. Screenshot of EDR's Applying LEED web page, a gateway
for matching EDR's online resources to specific LEED credits.
From the main Applying LEED web page (see Figure 2), you can
click on one of the LEED categories, such as Energy and Atmosphere,
and jump to a screen that describes that category and lists the
relevant LEED prerequisites and credits. Clicking on any of those
prerequisites or credits takes you to another screen that
summarizes the intent of the credit, the requirements for achieving
it, successful strategies related to the credit, and other useful
A click on the link "EDR-Related Resources" takes you to the
heart of Applying LEED: a hyperlinked list of EDR resources
relevant to that particular LEED credit, and a short description of
each resource (see Figure 3).
Go to the Applying LEED main page and give it a
try. Within seconds, you can navigate from the main Applying LEED
web page to design guides, case studies and other publications that
will further your understanding of what it takes to design,
construct and operate high performance, LEED-certified
Figure 3. Clicking on the link "LEED EA Credit 1: Optimize
Energy Performance" takes you to this list of EDR resources that
can help you achieve points under that credit.
California's Savings By Design program and the national LEED
Green Building Rating System are independent programs with mutually
supportive goals. Owners and design teams are finding that pursuing
SBD incentives for their California nonresidential construction
projects takes them a long way toward achieving LEED credits in the
Energy & Atmosphere category.
What's more, owners and design teams can put their SBD incentive
application to work by using it for the LEED certification process.
In particular, with some minor modifications, the savings
calculations performed for Savings By Design incentives using the
Whole Building Approach can also be used for LEED EA Credit
1-Optimize Energy Performance, which offers up to 10 credits for
savings beyond code (see Table 1).
There are two approaches to eligibility for Savings By Design
incentives, the Systems Approach and the Whole Building Approach.
The Systems Approach is a simplified method to optimize efficiency
choices, and the savings calculations cannot be used for LEED
compliance. The maximum owner incentive using the Systems Approach
is $75,000 per freestanding building or individual meter; there are
no design team incentives under the Systems Approach.
|Energy Cost Savings vs. Energy Code Baseline
||Potential Points for LEED EA Credit 1
Table 1. LEED-NC version 2.2 points
for energy performance better than code
The Whole Building Approach is the preferred method of
estimating energy savings because it enables the design team to
consider integrated, optimized energy efficiency solutions. With
the Whole Building Approach, the overall energy efficiency of the
project must be at least 10 percent better than the statewide
Energy Efficiency Standards for Nonresidential Buildings (Title 24)
in order for the owner to qualify for incentives (maximum of
$150,000 per freestanding building or individual meter). For the
design team to receive incentives (maximum of $50,000), the project
must be at least 15 percent better than Title 24. Figure 4 shows
incentive rates and savings for the Whole Building Approach.
Figure 4. Savings By Design incentive
rates for the Whole Building Approach.
The simulation model developed for the Whole Building Approach
incentive can also be used for LEED savings calculations. While
LEED-NC version 2.2 references the national standard ASHRAE
90.1-2004 as the baseline for energy savings calculations, the U.S.
Green Building Council has ruled that California's 2005 Title 24
Energy Standards are equivalent.
There is, however, one important difference between the LEED and
Savings By Design savings definitions, which means that an
additional step is required to convert Savings By Design results to
LEED results. LEED-NC 2.2 savings are expressed in energy cost
while Savings By Design incentive rates are based on savings in
Time Dependent Value for energy (see e-News 58, January 2007, for
an explanation of TDV). This difference means that the percent
savings result may be slightly different for the same building
calculated using each method.
Energy Design Resources' eQUEST software is one option for
designers to perform the calculations needed to qualify for the
energy portion of LEED. You can download eQUEST at
www.energydesignresources.com. Your utility representative may be
able to provide information about other approved calculation
Registration Opens Soon for Savings By Design Energy Efficiency
EDR, SBD & LEED: A High Performance Trio
If you're a developer, owner or designer of commercial buildings
in California, it pays to be familiar with this trio of high
Energy Design Resources (EDR) offers design tools and
resources that make it easier to design and build energy efficient
commercial, educational and institutional buildings in California.
EDR's no-cost design tools and resources-including Design Briefs
and Guidelines, case studies, building commissioning resources,
e-newsletters and training seminars-reduce the time designers and
owners spend evaluating the energy impacts of their design
decisions. Info: www.energydesignresources.com
Savings By Design (SBD) provides incentives and design
assistance to owners and design teams of commercial buildings in
California. To qualify for SBD owner incentives (up to $150,000),
the building must perform at least 10 percent better than required
by California's Building Energy Efficiency Standards, commonly
known as Title 24. To qualify for SBD design team incentives (up to
$50,000), the building must perform at least 15 percent better than
Title 24. Info: www.savingsbydesign.com .
LEED for New Construction and Major Renovations
(LEED-NC) is a green building rating system that certifies the
design and construction of high performance commercial and
institutional buildings. LEED, which stands for Leadership in
Energy and Environmental Design, is administered by the U.S. Green
Building Council, a nonprofit membership-based coalition of
building industry professionals. There are LEED rating systems for
a number of sectors, including existing buildings, commercial
interiors, core and shell development, and more. Info: www.usgbc.org.
Learning by Example: SBD & LEED Case
Energy Design Resources has published more than 20 case studies
featuring high performance nonresidential buildings in California.
A number of these case studies showcase projects that received SBD
incentives and are also LEED rated. Click on the links below to
learn more about these exemplary buildings:
Office Building Design features the Inland Empire Utilities
Agency Facility in Chino, two 33,000-square-foot single-story
office buildings that received LEED's highest Platinum rating as
well as SBD incentives.
• Teaming Up with
Nature showcases Bren Hall on the University of California,
Santa Barbara campus, a laboratory building that qualified for SBD
incentives worth $87,000 and received a LEED Platinum rating.
• High Performance
Learning features the Southeast Learning Center, a three-story
school completed in 2006 by the Los Angeles Unified School
District. This showcase school qualified as a CHPS high performance
school and achieved LEED certification at the basic level.
California utilities offer outstanding educational opportunities
that focus on the design, construction and operation of energy
efficient buildings. Listed here are a few of the many upcoming
classes; for complete schedules, visit each utility's website.
Explore state-of-the-art daylighting control strategies and
systems. Topics include dimming versus switching scenarios, open
and closed loop systems, equipment selection factors, system
verification and commissioning. Offered at Edison CTAC in Irwindale
HVAC System Design
Discover how accurate HVAC system design leads to energy efficient
installations and satisfied customers. Part 1, on 3/27/07, focuses
on duct design. Part 2, on 3/28/07, covers components and correct
refrigerant piping and vent pipe sizing for split systems. Both
classes take place at the San Diego Energy Resource Center.
LEED for New Construction Technical
In this detailed exploration of LEED for New Construction, you'll
acquire the basic tools and insights you need to incorporate green
building into your work, including examples of successful
strategies for each credit. Hosted by the Los Angeles chapter of
the U.S. Green Building Council.
Renewable Energy + Buildings = Efficient
Steven Strong will discuss how to engineer renewable energy
systems to work together with high performance buildings. Learn
about the latest in building integrated photovoltaic technologies
and applications, as well as successful small wind turbine
applications. Offered on 3/21/07 in Sacramento.
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e-News is published by Energy Design
an online resource center for information on energy efficiency design practices in
Savings By Design (www.savingsbydesign.com)
offers design assistance and incentives to design teams and building owners in California
to encourage high-performance nonresidential building design and construction.
Energy Design Resources and Savings By Design are funded by California utility customers
and administered by Pacific Gas and Electric Company, Sacramento Municipal Utility
District, San Diego Gas and Electric, Southern California Edison and Southern California
Gas Company, under the auspices of the California Public Utilities Commission.