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March 17, 2023
ASPEN, Colorado — Snow falls thick as skiers shed their gear and duck into the Sundeck Restaurant, one of the first certified energy efficient buildings in the U.S. – this one at 11,200 feet (3,413 meters) above sea level atop Aspen Mountain in Colorado. Skiers in brightly colored helmets jockey for a spot at the bar, their bodies warmed by thick, insulated walls and highly efficient condensing boilers.
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