The aim of the study is to validate CFD approaches for the simulation of the dispersion of gases and vapors in an enclosed space at different flow rates, and to show the impact of one important determinant of simulation accuracy.CFD results and measurements were compared, showing a good correspondance for the pollutant concentration when the boundary condition was a profiled velocity inlet and not an uniform velocity inlet.

This article is a study of the air quality at a bus terminal. Presence and concentration of indoor air quality indices were determined by field surveys and sampling. Bus emission rates, occupational exposure and ventilation requirements to have a correct indoor air quality were simulated by mathematical model.
The results show that the natural ventilation rates are too low for having a good indoor air quality, and that pollutants emission varies with the temperature.

In that study, formaldehyde exposures was examined in relation to asthma for young children in western Australia. An association was shown by comparing results of respiratory questionnaire and skin-prick test, and results of formaldehyde, average temperature and relative humidity measurements.

In this study, associations between concentration levels of airborne particles and fungi were examined in 14 houses in Brisbane. No association was found between the fungal spore and submicrometer particles or PM2.5 concentration, but a weak link was found between fungal and supermicrometre particle concentrations : similarity in behaviour lies in the relation of the contaminant with the distance from the source.

This study compares the contaminant concentration obtained from simple models with contaminant concentration fields obtained from CFD simulations, for various rooms and source configurations. Airflow and contaminant distributions were simulated.

This article defines a new air-exchange efficiency that takes into account the occupancy in each zone.. Cases studies are then described and show that the new efficiency can better evaluate the ventilation effect of the room.

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.

Carbon dioxide concentration, indoor air temperature and relative air humidity are studied in 7 schools with natural ventilation systems, during 58 days on one year. The results show that the level of 1500 ppm of CO2 is exceeded in 39 days. A software programme was developed to calculate the CO2 concentration level according to the number of pupils and the ventilation rate.
Health problems may result from a too low ventilation rate.

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 use of house dust is studied to identify sources and quantify levels of toxicants for the estimation of exposure. Sampling strategies were examined, just as uncertainty and lack of knowledge. The presentation of the results of sampling is also discussed. This article describes case studies.