Section 2: Individual LEED Credit Reviews
Table EA1-1
Additional Energy Efficiency Measures (EEMs) to Earn Three and Five Energy Points (Courthouse)
Energy Efficiency Measures Included (Marked 'X')
CO2
0.49
VFD
Sensor
Mod
kw/ton
Cooling
1.0
Imprvmnt
Energy Control
Occ
Prem Eff
Cond
Chiller
Tower
watts/SF Daylight
over
LEED
LEED
Recovery of O.A.
ASHRAE lighting dimming Sensors Motors
Boiler
w/VFD
Fans
Case
Rating
Points
1A
Certified
1
16.9%
Low Cost
2A
Certified
3
25.4%
X
X
X
X
High Cost
3A
Silver
3
25.4%
X
X
X
X
Low Cost
4A
Silver
5
35.2%
X
X
X
X
X
X
X
X
X
High Cost
5A
Gold
5
35.2%
X
X
X
X
X
X
X
X
X
Low Cost
6A
Gold
5
35.2%
X
X
X
X
X
X
X
X
X
High Cost
Courthouse EEMs
High-efficiency chillers (0.49 kw/ton) with
variable frequency drives Cost premiums are
Reduced Lighting Power Density in offices,
defined to upgrade the two 325-ton
jury rooms, and judges chambers (1.0
centrifugal chillers.
watts/SF) This measure is not expected to
Variable frequency drive cooling tower fans
add to the cost of the project, as the lower
No cost premium was identified for this
lighting power density can typically be
measure.
achieved through careful lighting design or
Energy recovery Cost premiums are defined
through the use of low-power factor ballasts
to add enthalpy wheel heat recovery units.
in the lighting fixtures, which are no more
The units are sized for a total of 45,900 cfm
expensive than standard ballasts.
of outside air. The costs include additional
Daylight dimming systems at perimeter offices
ducting to the units and additional Building
(both private offices and open office areas)
Management System (BMS) controls.
Cost premiums are defined for dimmable
Carbon dioxide sensors to modulate outside
air based on occupancy in the courtrooms,
used in the dimming system.
conference rooms, and office spaces Cost
Occupancy Sensor controls for lighting in all
premiums are defined for CO2 sensors, for
enclosed offices and conference rooms Cost
sensor tie-ins to the BMS, and for additional
premiums are defined for wall mounted
controls programming.
sensors, and, where applicable, for ceiling-
mounted occupancy/daylight sensors.
Premium efficiency motors Cost premiums
are defined for pump and fan motors.
Modulating condensing boilers (93 percent
nominal efficiency) Cost premiums are
defined to upgrade from the two standard
efficiency boilers of the baseline (3,500,000
BTU/h each) to four condensing boilers
(2,000,000 BTU/h each).
GSA LEED COST STUDY
75
Previous Page
