Page 209 - Solar Power in Building Design The Engineer's Complete Design Resource

LEED 179

One credit is awarded for the use of high-efficiency irrigation management control
technology. A second credit is awarded for the construction of special reservoirs for
the storage and use of rainwater for irrigation purposes.

Innovative water technologies, credit no. 2 The main purpose of this meas-
ure is to reduce the potable water demand by a minimum of 50 percent. Mitigation
involves the use of gray water by construction of on-site natural or mechanical waste-
water treatment systems that could be used for irrigation and toilet or urinal flushing.
Consideration is also given to the use of waterless urinals and storm water usage.
The point weight granted for this measure is 1.

Water use reduction, credit no. 3 The intent of this measure is to reduce water
usage within buildings and thereby minimize the burden of local municipal supply and
water treatment. Design measures to meet this requirement involve the use of waterless uri-
nals, high-efficiency toilet and bathroom fixtures, and nonpotable water for flushing toilets.
This measure provides one credit for design strategies that reduce building water
usage by 20 percent and a second credit for reducing water use by 30 percent.

ENERGY AND ATMOSPHERE
Fundamental commissioning of building energy systems, prerequisite no. 1
This requirement is a prerequisite intended to verify intended project design goals and
involves design review verification, commissioning, calibration, physical verification of
installation, and functional performance tests, all of which are to be presented in a final
commissioning report.
The point weight granted for this prerequisite is 1.

Minimum energy performance, prerequisite no. 2 The intent of this prereq-
uisite is to establish a minimum energy efficiency standard for a building. Essentially,
the basic building energy efficiency is principally controlled by mechanical engineer-
ing heating and air-conditioning design performance principles, which are outlined by
ASHRAE/IESNA and local municipal or state codes. The engineering design procedure
involves so-called building envelop calculations, which maximize energy performance.
Building envelop computations are achieved by computer simulation models that
quantify energy performance as compared to a baseline building. The point weight
granted for this prerequisite is 1.
Fundamental refrigerant management, prerequisite no. 3 The intent of this
measure is the reduction of ozone-depleting refrigerants used in HVAC systems.
Mitigation involves replacement of old HVAC equipment with equipment that does
not use CFC refrigerants. The point weight granted for this prerequisite is 1.

Optimize energy performance, credit no. 1 The principal intent of this meas-
ure is to increase levels of energy performance above the prerequisite standard in order
to reduce environmental impacts associated with excessive energy use. The various