Honolulu Hale, City and County of Honolulu

At Honolulu Hale, The Department of Design and Construction oversaw the installation of energy efficient air conditioning, lighting, and controls systems.  Two new centrifugal chillers, an induced draft cooling tower, a chilled water loop with variable speed pumping power, a new energy management system, and direct digital controlled air handling units were part of the energy efficiency upgrade.  In addition, T-8 fluorescent lamps and LED exit signs were installed throughout the building.  The energy efficient measures alone reduced energy consumption by nearly 46%.

However, additional efficiencies were realized with the installation of a 200 kW combined heat and power (CHP) system that supplies electric power to the facility and uses “waste” heat to serve a 55 ton absorption cooling system, among the first in the state.