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A California company has been hired to retrofit New York City's Empire State building with 6,500 energy saving windows.
A number of iconic buildings have undertaken major renovations to become more efficient, but even more importantly, to lure new tenants.
The managers of the Empire State Building plan to spend $120 million on environmental improvements and the windows are center stage.
Johnson Controls, Inc. said it has selected Serious Materials for the project. Johnson did not disclose how much the contract for the windows was worth.
Johnson Controls said the windows will save about $400,000 a year in energy costs.
Serious Materials, which has headquarters in Sunnyvale, Calif., will refurbish existing windows so that they insulate better, reducing solar heat gain by 50 percent.
Johnson Controls said that the window project is one of four energy-saving measures that should cut the building's energy use by 38 percent, saving $4.4 million per year in energy costs and reduce 105,000 metric tons of carbon dioxide emissions over the next 15 years.