In the past years, European building developers, architects
and engineers are deciding more often to use a
radiant cooled ceiling to thermally condition spaces with
high cooling loads, as the experiences with cooled ceilings
are very persuasive w20x. About 10% of all new installa-
tions in German non-residential buildings mostly build-
ings for banks and insurance companies. are being built or
retrofitted with cooled ceilings to provide the best thermal
comfort w23x. When cooled ceilings are properly designed
and operated favorable operation costs and more usable
building space can be achieved as well w7x
Those advantages
when compared with all-air systems are provided
only by hydronic radiant cooled ceilings, which only remove
sensible cooling loads. Latent loads and pollutants