Page 234 - Alternative Energy Systems in Building Design

210 ENERGY CONSERVATION

TABLE 5.4 ENERGY-SAVING CREDIT POINTS

% TOTAL ENERGY-SAVING CREDIT POINTS

5 1
10 2
20 3

gases, and geothermal and other technologies discussed in various chapters of this
book. The credit-award system under this measure is based on a percentage of the total
energy demand of the building. See Table 5.4.

Additional commissioning, credit no. 3 This is an enforcement measure to
verify whether the designed building is constructed and performs within the expected
or intended parameters. The credit-verification stages include preliminary design
documentation review, construction documentation review when construction is com-
pleted, selective submittal document review, establishment of commissioning docu-
mentation, and finally, postoccupancy review. It should be noted that all these reviews
must be conducted by an independent commissioning agency. The point weight awarded
for each of the four categories is 1.

Enhanced refrigerant management, credit no. 4 This measure involves
installation of HVAC, refrigeration, and fire-suppression equipment that does not
use hydrochlorofluorocarbon (HCFC) agents. The point weight awarded for this
category is 1.

Measurement and verification, credit no. 5 This requirement is intended to
optimize building energy consumption and provide a measure of accountability. The
design measures implemented include the following:

■ Lighting system control, which may consist of occupancy sensors, photocells for
control of daylight harvesting, and a wide variety of computerized systems that
minimize the energy waste related to building illumination. A typical discussion of
lighting control is covered under California Title 24 energy-conservation measures,
with which all building lighting designs must comply within the state.
■ Compliance of constant and variable loads, which must comply with motor design
efficiency regulations.
■ Motor size regulation that enforces the use of variable-speed drives (VFDs).
■ Chiller efficiency regulation measures that meet variable-load situations.
■ Cooling load regulations.
■ Air and water economizer and heat recovery and recycling.
■ Air circulation, volume distribution, and static pressure in HVAC applications.
■ Boiler efficiency.