Volume 37, Issue 6, June 2002


Window Industry and DOE Meet to Discuss New ENERGY STAR® Criteria

Representatives of virtually all the major glass, window and door manufacturers met at the Department of Energy (DOE) headquarters in Washington, D.C., on March 20 to discuss the ENERGY STAR windows program and possible revisions to the criteria for windows, doors and skylights.

The meeting was part of DOE’s process to fully revaluate the criteria for ENERGY STAR windows, as a follow-up to industry feedback regarding changes to the program, which were proposed last October. Last fall, DOE proposed several alternate changes, including a single “one-size-fits-all” proposal, which, according to Pilkington’s Paul Gore, “was rejected outright by the industry.”

Gore has been one of the industry’s members who has been following this matter since the additional proposal. He said that the subsequent criteria changes were to have taken effect on January 1, 2002 but this was delayed, following the discovery of a calculation error in the computational models used to evaluate the energy performance of the changes. As a result of the error, DOE delayed the implementation date, commissioned an evaluation of several alternative criteria changes and scheduled the March 20 meeting facilitate review and discussion on the analysis.

There were eight proposals regarding the ENERGY STAR criteria that DOE evaluated. The proposals included the original criteria, the proposed criteria and several alternate proposals submitted by stakeholders and interested parties. The DOE contracted Arthur D. Little, along with Lawrence Berkeley National Labs, to evaluate the technical potential of the various proposals.
Eight proposals that weighted the relative impacts of various U-value/solar-heat-gain coefficient (SHGC)/climate-zone combinations were evaluated. A database of 48 cities was used to calculate the energy consumption of a typical residential building. The goal of the analysis was to provide potential energy-savings estimates for comparing various alternative criteria. The analysis conducted by Arthur Little focused on the following areas: potential national and regional energy savings; impact on product availability; consistency with energy codes; and energy-related impacts within the Central region of the United States.

Following this meeting, the DOE announced on May 8, 2002, its revised proposed criteria for a new specification for ENERGY STAR windows, doors and skylights, which is similar to DOE’s original October proposal, except for some modifications. Interest stakeholders had 45 days to comment by June 21, 2002. 

Environmental Protection Agency Recognizes PPG Industries 

Pittsburgh-based PPG Industries’ plant in Mead, Pa., has been named a member of the U.S. Environmental Agency’s (EPA) program, designed to reward facilities whose performance extends beyond compliance with environmental laws.

David C. Cannon, PPG vice president of environment, health and safety, said the company was pleased with the honor.

“We are proud and honored by the EPA recognition,” Cannon said. “It reflects PPG’s commitment to reduce pollution, comply with environmental regulations and continuously improve our environmental performance and productivity. PPG has always shared EPA’s goal of protecting the environment.”

Since 1996, PPG said the Meadville plant has reduced its volume of solid waste by 25 percent with the use of recyclable racks. In addition, the plant reuses more than 100,000 tons of waste glass that otherwise would be disposed of in landfills.

The plant is also undergoing changes now to help it become more energy-efficient in the future. PPG is rebuilding a $23 million glass-melting furnace and installing an energy-efficient, oxygen-fuel furnace on one of the plant’s two float-glass production lines, according to Lynn Hoover, plant manager.


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