English

The aim of the article is to study the effect of removing small airborne particles in an office building.The standard particle filters were replaced with highly efficient filters. Occupants answered questionnaire weekly and multiple environment measurements were done.The enhanced filtration reduced the concentration of smallest particles, symptoms were not reduced, but performance-related mental states improved.

This article studied the exposure to 45 defined volatil organic compounds in an university art school, ventilated with a 100% exhaust mechanical ventilation system. Several students wore passive dosimeters.Floors where no emission of VOCs occurred had no detectable exposures : the conclusions show that a non-recirculating ventilation system can eliminate indoor air quality issues between floors.

The aim of that study is to establish the relationship between symptoms and report of building dampness and odors.A questionnaire was then sent to the inhabitants of 231 multi-family buildings of Stockholm, containing more than 4800 dwellings, with questions about : personal factors, symptoms, population density in the apartment, water leakage, odors, and signs of high indoor air humidity.A combination of odor and high humidities was linked to high occurrence of the symptoms : humidity in building is therefore associated to Sick building Syndrome.

This paper intends to resolve the spatial and temporal variation of VOC concentrations in apartments. Numerous indoor and outdoor measurements taken in the period between 1994 and 2001 have been analyzed.A method is presented, it can be used to normalize the results from VOC measurements taken at any time of the year. A table with adjustments factors is given.

This paper is a presentation of a methodology for developing responses to sudden releases of toxic pollutants in buildings. This methodology may be applied even if few data on the building are available.The results are several tools that describe uncertainty in the predictions and a model to rank the parameters depending to their influence on the expected reduction in model prediction uncertainties.

Usually only primary emissions from building products are measured. That study takes into account potential secondary emissions due to oxidation with ozone. In the long run secondary emissions may influence the perceived air quality.The aim of that study was to investigate if the interaction between ozone and selected building products induces changes in emissions.

The RAGENA model of radon takes into account all the parameters and processes affecting radon levels (in the source, its transport, its entry into a dwelling and its accumulation indoors).The model has been tested in a mediterranean house. The results given by the model are similar to the ones obtained experimentally.

The aim of this study was to test the following hypthesis : in schools, bacterial markers may be increased in indoor air because of the presence of children.Dust samples were collected from the school rooms when occupied but also when unoccupied during the week-end. Results have been analysed and the conclusion is that in unoccupied rooms the airborne dust is of environmental origin, whereas the increase level of dust in occupied rooms is due to the children presence.

Five methods of sampling lead dust where tested for that study in 33 New Jersey homes of children with blood problems.Samples were collected on the carpets of the different homes. Among the five sampling methods used then compared (wipe, adhesive label, C18 sheet, vacuum, hand rinse) the first one appeared the most appropriate for measuring lead from carpets for exposure assessment, and vacuum the most recommended for collecting information on total lead accumulation.

This paper is the second part of a study on indoor emission sources models : this part is the compilation and review of 48 methods for parameter estimation.For an useful valid model, estimation of the different parameters of a model must be easy. But the development of methods for parameters estimation is often left for only the development of model, and these models are then not used after their publication.