Buildings constructed in tropical climatic conditions must be designed to have a very low carbon foot
print that will need the buildings to be used as free running while ensuring adequate thermal comfort with passive
means. However, there could be certain instances when the use of active means of thermal comfort like air
conditioning will be inevitable due to special requirements. Hospital buildings or buildings with special equipment
would need lower indoor temperature like 15 - 18 °C compared to the ambient temperature in tropical climates.
Thus, the growth of mould on the building elements such as walls and floors of the surrounding areas will be
inevitable unless special planning provisions have been used with strategically placed buffer zones that will have
normal air conditioning which maintains indoors with relatively lower levels of moisture content. Mould created on
various building elements can produce spores, air-bome particles and gases which are harmful to the humans and
built environments. In order to identify the magnitude and the causes for mould growth, a comprehensive research
was carried out with a case study in a hospital building planned without attention to much detail and hence led to a
severe growth of mould, where several concerns were raised by the occupants of the building, related to sick
building syndrome. This will shed light on special planning precautions that must be taken by the architects and
engineers who plan buildings with specially air conditioned spaces in large buildings located in countries with
tropical climatic conditions
