What would be the estimated energy savings if NYC raised its window performance standards in multifamily buildings to Energy Star ratings?

Question

What would be the estimated energy savings if NYC raised its window performance standards in multifamily buildings to Energy Star ratings?

Asked by Mike Pabon

There are tens of thousands of highly inefficent aluminum windows throughout NYC multifamily buildings. What would be the estimated energy savings in BTU's and GHG mitigation if NYC raised it's window performance standards in multifamily buildings to minimum Energy Star ratings?

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Answers

Harold Remlinger, AIA, LEED AP, NCARB's picture

Energy savings based on BTUss is deterined by size and U value of the unit and glazing.

One of the best case studies which I have found is the replacement of window glazing in the Empire State building.

  • Their web page is here.
  • Click on the "Sustainability" link on the home page to learn more on cost of renovations, savings and return on investment.