TWI Recommendations
Specifying MAXIMUM NFRC Ratings

  • Recommended for all of Texas:
    -0.40 SHGC and 0.75 U-factor
    -Meets Energy Star criteria in South
    -Achievable with low solar low-E glass in any frame type
  • Consider upgrading frame to aluminum with thermal breaks, wood or vinyl for lower U-factors and even better energy performance

More Information?


©2000 TWI v1.1

 


 

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