Section 2: Individual LEED Credit Reviews
LEED Credit EA-2:
Wind turbines.
Renewable Energy
Systems that were not deemed likely for typical
GSA buildings for cost or practicality purposes
include:
Intent:
High-temperature solar;
Geothermal energy;
Encourage and recognize increasing levels of on-
site renewable energy self supply in order to
Biomass; and
reduce environmental impacts associated with
Bio-gas.
fossil fuel energy use.
The LEED 2.1 Reference Guide notes that passive
solar design, solar hot water heating, ground-
Requirement:
source heat pumps, and daylighting do not qualify
Supply at least 5% of the building's total energy
for points under this credit, because they do not
use (as expressed as a fraction of annual energy
generate power. These strategies are accounted for
cost) through the use of on-site renewable
in Credit EA-1.
energy systems.
Basis for Cost Assumption
(1 point)
Using the computer energy modeling results and
Supply at least 10% of the building's total energy
Energy Cost Budget forms from Credit EA-1, the
use (as expressed as a fraction of annual energy
annual regulated energy costs for the Courthouse
cost) through the use of on-site renewable
and Office Building are used to define the annual
energy systems.
kilowatt-hour production required to meet the 5
(1 additional point)
percent LEED threshold (1 point). From these
target numbers, cost estimates are defined for roof-
Supply at least 20% of the building's total energy
mounted photovoltaic (PV) systems as follows:
use (as expressed as a fraction of annual energy
cost) through the use of on-site renewable
Courthouse (used only in Scenario 6A)
energy systems.
A monocrystalline PV panel array of 6,000 square
(1 additional point)
feet (60 kW peak) is installed on a mounting
structure on the upper building roof. The PV
system is utility grid connected without battery
Cost Impact = 5
back-up or generator. The cost includes all system
components including inverters, disconnects,
wiring/conduit, and a data acquisition system.
1
2
3
4
5
Office Building, Minimum Facade Renovation
GSA
No
Low
Moderate
High
(used only in Scenario 5B)
Standard
premium,
premium
premium
premium
(no cost)
psble svgs
(<50K)
(50-150K)
(>150K)
A monocrystalline PV panel array of 6,750 square
feet (67.5 kW peak) is installed on the upper roof.
Practical Applications
The system components are similar to those
defined for the Courthouse model.
The LEED 2.1 Reference Guide emphasizes that
Office Building, Full Facade Renovation
this credit is targeted to on-site renewable energy
(used only in Scenario 6B)
systems that convert energy from sun, wind, or
biomass into usable energy. Systems that would
A monocrystalline PV panel array of 6,200 square
likely be considered for GSA projects include:
feet (62 kW peak) is installed on the upper roof.
The system components are similar to those
Photovoltaics (building-integrated, roof
defined for the Courthouse model.
mounted, or site mounted); and
GSA LEED COST STUDY
80
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