Refers to a study for a Wisconsin telephone company that compared central air-handling systems with chilled-water packaged fan-coil units for application in a large new data-processing centre. Describes the comparison in some detail using bar charts and tables. Lists and discusses the clear advantages found to using a central air-handling unit system. Describes the equipment and features included in the final selection.

KEYWORDS: Computer rooms, air conditioning, comparing, central station air conditioning, packaged air conditioning units, USA