fungal contamination

Since the turn of the century, alarming data produced by the Indoor Air Quality Observatory (OQAI) have led to changes in French legislation, including, most notably, the introduction of compulsory labelling for construction products (decree no. 2011-321 of 23 March 2011).

The characteristics of climate in Japan are hot and humid in summer, with cold and dry winter. For thisreason, mold growing in rooms is common during summer period. On the other hand, in winter, due tospace heating, indoor environment is over-dry as a result of low humidity.

Analyses possible biocontamination of fibreglass duct materials used for thermal insulation and noise control in both residential and commercial heating, ventilation and air conditioning systems, in the light of concerns about the safety of their use in high humidity conditions. Static environmental chamber tests were carried out over six weeks to investigate conditions which might support the growth of a fungus, Penicillium chrysogenum.

Describes a study of indoor aeromycota in 15 homes in Canada. Significant differences in airborne spore concentrations were found in the different types of room. Living rooms held the highest count of airborne propagules, followed by family rooms, kitchens, bathrooms and bedrooms. Kitchens had the greatest variety of fungi. Increased numbers of spores were the result of dampness and carpets, in general. Concentrations of airborne fungi were found to be reduced by the presence of forced air heating systems, humidifiers, air filters and air conditioners.