The project not only saves money for the Empire State Building and for tenants, but it has other benefits as well.
Projects in the recommended package, including the windows, radiative barrier, and better controls, will provide enhanced thermal comfort to building occupants. Demand control ventilation will improve indoor air quality by ensuring adequate, though not excessive, ventilation is provided to tenant spaces. A high-quality visual environment will be provided through tenant lighting and daylighting efforts that layer ambient, direct/indirect, and task lighting to maximize comfort while saving energy.
Chiller Plant Retrofit and Sizing
The recommended package of retrofit measures provides a ~30% reduction in the amount of heat that needs to be removed from the building. This cooling load reduction along with the existence of industrial chillers within the Empire State Building enabled the project team to recommend retrofitting the chiller plant rather than installing a new chiller plant to handle additional capacity. By retrofitting the chiller, the Empire State Building can delay by the construction of a new chiller plant. By delaying the need for a new chiller plant, the Empire State Building will also be able to downsize its new plant based on the load reductions the building can realize through efficiency measures over the next 15 years and beyond.
The recommended package of measures also reduces the building's peak electric demand by approximately a third, freeing up currently constrained electrical capacity.
Based on the phasing in of the recommended projects, it is estimated that over 100,000 metric tons of carbon will be saved over the next 15 years. This is equivalent to CO2 emissions from the use of approximately 11 million gallons of gasoline.