Volume 37, Issue 2, February 2002


DOE Adjusts ENERGY STAR® Criteria

The Department of Energy (DOE) has announced that the solar heat gain coefficient (SHGC) criteria for all ENERGY STAR windows sold in the central region of the United States was to have been lowered from 0.55 to 0.40, effective January 1, 2002. Upon further review, however, the DOE delayed the change until April 1, 2002, after which all new ENERGY STAR products must conform to the revised criteria.

The DOE cited the following as the reasons for the delay:
• To allow more time for partners to incorporate the necessary changes into their manufacturing, marketing and sales activities;
• To review additional information about the energy savings implications of the new criteria; and
• To re-evaluate the energy analysis in support of the new criteria, which was found to have a mathematical error.

The DOE issued the announcement on December 21, 2001, via a letter sent by Richard H. Karney, P.E., acting manager of the ENERGY STAR program.

Officials at Pilkington North America say they are pleased with the DOE’s decision to delay the implementation of the new ENERGY STAR criteria for windows in order to further review the changes that are being made in this program.

“Pilkington was just one of many in the fenestration industry who requested that the Department of Energy re-evaluate its decision to lower the SHGC for ENERGY STAR windows in the central region of the United States,” said Paul Gore, business segment leader for building products. “Upon review and additional information, we’re confident that the DOE will recognize the need to raise the SHGC criteria in the central region to at least 0.55.”


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