Maplewood, Mo.— Engineers at multi-discipline engineering firm William Tao & Associates (WTA) liked the performance and aesthetics of fabric HVAC air distribution ductwork enough to replace an adequate spiral metal duct system with it while renovating its own new office headquarters. WTA recently moved into the 17,000-square-foot top floor space of a two-story, free-standing office building in the St. Louis suburb of Maplewood, Mo. Bruce

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