Energy Star Qualification Criteria For Residential Windows And Skylights

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Performance criteria for windows and skylights are based upon climate zones and ratings certified by NFRC (National Fenestration Rating Council). Use this chart from Energy Star as a reference for recommended window and skylight specifications for your climate zone. Download for specific U-Factor and SHGC by climate zone.

  • U-Factor
  • SHGC
  • Climate zones

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