All zero investment measures can be applied to the existing
buildings which include reset heating and cooling set point temperatures.
With zero investment, about 2.99% of electric energy
can be saved annually by resetting cooling and heating temperature
of HVAC system. With minor investment, about 12.02% of
electric energy can be saved annually by implementing stepped
dimming daylighting control and double glazing. With major
investment, about 26.86% of electrical energy can be saved annually
by replacing CAV to VAV of HVAC system and low COP chillers
to high COP chillers. Finally, by implementing all of these ECMs together,
about 41.87% electrical energy can be saved annually.