Abstract
Comfort conditions in building interiors are now frequently provided through an integrated ceiling system. These systems vary in design, function and appearance. This paper examines the basic environmental conditions produced by such systems after at least one year's use. Conditions were examined at ten separate sites. The paper reports on the measured conditions and compares them to the design objectives and relates the occupants' attitude to the prevailing comfort level. The paper concludes that few of the installations perform to the design objectives. The occupants appeared to be more tolerant of the imposed conditions than is suggested by design guides. Evidence gathered indicated serious deficiencies in both commissioning and maintenance of the systems.
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