ENERGY STAR® Version 6.0 Final Comments due Feb. 8

February 01, 2013

The window of opportunity is closing to comment on Draft 2, Version 6.0 of the ENERGY STAR® Windows, Doors and Skylights Specification. All interested parties must provide comments by Friday, February 8, 2013, via email to

The most significant change to Draft 2 is the addition of two more tradeoff levels for the Northern Zone:

• ≤ 0.27 U-factor with any Solar Heat Gain Coefficient (SHGC)
• = 0.28 U-factor with ≥ 0.32 SHGC
• = 0.29 U-factor with ≥ 0.37 SHGC
• =0.30 U-factor with ≥ 0.42 SHGC

Submit your comments regarding Draft 2 before it’s too late. View Draft 1 comments and responses from the EPA.

Contact your Quanex representative to learn how the recently released Quanex Optimizer version 3.0 can help you analyze your options to meet the proposed ENERGY STAR v6 and Most Efficient program criteria.


Eric Jackson
Director of External Affairs

Download the Quanex Building Products – ENERGY STAR® Version 6.0 Final Comments due Feb. 8