Page 232 - Alternative Energy Systems in Building Design

208 ENERGY CONSERVATION

Another design measure suggests use of Energy Star high-reflectance and high-
emissivity roofing. To meet these requirements, the project site must feature extensive
landscaping. In addition to minimizing building footprints, it is also suggested that
building rooftops have vegetated surfaces and that gardens and paved surfaces be of
light-colored materials to reduce heat absorption. The point weight granted for each of
the two categories discussed here is 1.

Light-pollution reduction, credit no. 8 In essence, this requirement is intended
to eliminate light trespass from the project site, minimize the so-called night-sky
access, and reduce the impact on nocturnal environments. This requirement becomes
mandatory for projects that are within the vicinity of observatories.
To comply with these requirements, site lighting design must adhere to Illumination
Engineering Society of North America (IESNA) requirements. In California, indoor
and outdoor lighting design should comply with CEC Title 24, 2005, requirements.
Design measures to be undertaken involve the use of luminaries and lamp standards
equipped with filtering baffles and low-angle spotlights that can prevent off-site hori-
zontal and upward light spillage. The point weight granted for this measure is 1.

WATER EFFICIENCY MEASURES
Water-efficient landscaping, credit no. 1 This measure is intended to mini-
mize the use of potable water for landscape irrigation purposes. 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
wastewater-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. This measure provides 1 credit for design strategies that reduce building
water usage by 20 percent and a second credit for a reducing water usage by 30 percent.
Design measures to meet this requirement involve the use of waterless urinals, high-
efficiency toilet and bathroom fixtures, and nonpotable water for flushing toilets.

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