Window Replacement Solutions

Many energy retrofits focus on lighting, boilers or motors, but the full efficiency gains and energy savings from these retrofit measures cannot be realized with inefficient windows. Inefficient windows account for 25% of a typical building's heat load in cool climates and as much as 50% of the cooling load in warm climates. Window replacement can be done as a stand alone efficiency measure or as part of a deep energy retrofit. 


  • Thermal insulation
  • Sound and noise insulation
  • Enhanced security
  • Reduced condensation and air infiltration
  • Improved aesthetics 
  • Improved occupant comfort

Featured Resources

The Empire State Strikes Back


In 2009, owners of one of New York City great architectural landmarks, the Empire State Building embarked on a renovation to reduce the skyscraper energy use by more than one-third by 2013.

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