Energy: Open Windows

Idea from a fresh-air fiend

San Francisco boasts a lot of awesome architecture: the towering headquarters of Transamerica Corp., which looks like an elongated pyramid; the severe, deep-carnelian granite Bank of America building; the hollowed-out Embarcadero Hyatt Regency, its interior a modern evocation of a Babylonian hanging garden. Bay City boosters will soon have another unusual building to talk about. Construction has just begun on the 19-story Northern California headquarters of Pacific Mutual Life Insurance Co., which Architect William Pereira reckons is the first high-rise office structure with openable windows to be built in the U.S. since...

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