Section 2: Individual LEED Credit Reviews
LEED EA Prerequisite 2:
renovation projects. These energy use targets result
in buildings that are more efficient than buildings
Minimum Energy
that merely comply with the 90.1 standard.
Performance
Credit EA-1, Optimize Energy Performance,
includes additional information on the GSA energy
targets used in the study.
Intent:
Basis for Cost Assumption
Establish the minimum level of energy efficiency
for the base building and systems.
GSA's energy use targets are considered project
requirements independent of LEED. As such,
Requirement:
there is no LEED-related premium associated with
this prerequisite.
Design the building to comply with
ASHRAE/IESNA Standard 90.1-1999 (without
Summary of First Cost Impacts
amendments) or the local energy code,
whichever is more stringent.
Courthouse (New Construction, 262,000 GSF)
Cost Impact = 1
No identified cost premiums.
1
2
3
4
5
Office Building (Modernization, 306,600 GSF)
GSA
No
Low
Moderate
High
No identified cost premiums.
Standard
premium,
premium
premium
premium
(no cost)
psble svgs
(<50K)
(50-150K)
(>150K)
Additional Considerations
Practical Applications
None identified.
As noted in GSA's P100 facilities standards, federal
legislation directs GSA to adhere to voluntary
Synergistic Credits
commercial energy standards as reflected within
the Code of Federal Regulations, 10CFR 434.
ASHRAE/IESNA Standard 90.1 meets or exceeds
GSA's energy use targets apply to this prerequisite
10CFR 434 and may be substituted as an
and to Credit EA-1, Optimize Energy
equivalent reference. The one exception is lighting
Performance. For the purposes of this study,
system performance, which is separately addressed
however, no synergistic cost impacts apply.
in P100. GSA's lighting standards are similar to
those in Standard 90.1-1999; however, there are
some differences. In P100, a number of spaces
types are assigned a lower allowable lighting power
density than in 90.1, while in other cases space
types are assigned higher allowable lighting power
densities. Equivalence to 90.1 would normally be
expected overall.
GSA projects are also subject to Executive Order
13123, a national program that requires the federal
building stock to reduce its energy use by 35
percent by 2010, compared with a 1985 baseline.
To achieve this goal, GSA assigns specific energy
use targets to all major new construction and
GSA LEED COST STUDY
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