There is increased interest in using chilled ceilings and beams for cooling in UK buildings, on account of their perceived advantages over traditional air or chilled water based systems. However, there is currently limited knowledge or experience of the use of chilled ceiling and beam systems in the UK, and there is no proper professional guidance. Designers are particularly concerned to avoid condensation occurring on the exposed cold surfaces that could cause a health problem or lead to the so-called "office rain" effect.
There has been a recent growth of interest in the use of passive cooling in buildings, particularly in the use of chilled ceilings, including both beams and radiant panels. However, there is still concern about the risk of condensation on cold surf aces and water dripping onto occupants or furnishings, especially where there is no control over the level of humidity for instance in naturally ventilated buildings.
This Bulletin on preventing dampness in houses covers some aspects that builders and subtrades may occasionally
be required to deal with . It is, however, also intended for general guidance to householders.
This paper gives guidance on assessing the risk of surface condensation and mould growth at thermal bridges around openings in the external elements of buildings, and describes a method of assessing their effect on overall heat loss. It supports the 1995 revision of the Building Regulations for conservation of fuel and power.
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