The chilled-water system in a South Florida high-rise went into operation in April. By June, the pipe insulation was saturated with water, and condensation was dripping on people's heads. The problem cost more than $20 million to correct. What went wrong? Key to the pipe-insulation failure was the all-service-jacket (ASJ) vapor-barrier facer on the 1-in.-thick phenolic-foam insulation specified for the chilled-water pipes, which were up to 16 in. in diameter and operated at 45°F. ...

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