For that study, the determination of concentration of nitrogen dioxide and formaldehyde has been carried out in 96 homes in Quebec city. It appears that NO2 concentrations in homes were positively correlated with air change rates and elevated in homes equipped with gas stoves and Formaldehyde were negatively correlated with air change rates and significantly elevated in homes heated by electrical systems.

On a prototype system for local air-conditioning named personal microclimate system (PERMICS), ventilation effectiveness was measured. A new parameter based on the relative decrease of tracer gas in the first minute of system operation has been introduced, its usefulness has been verified by simulation results from commercial CFD software. This new parameter makes possible quick measurements of the local efficiency of ventilation systems.

The aim of that study was to compare the aerial contaminants concentrations between the levels of ventilation rate on the one hand and to determine the variation pattern of aerial contaminants affected by the ventilation rate. Results and conclustions are presented.

For that study, during nine 2-week periods, fine particles (PM 2.5) were sampled indoors and outdoors at 40 sampling sites located in Stockholm. The samples were analysed for elemental concentrations using X-Ray fluorescence (XRF) spectroscopy. The results and conclusions are presented.

For that study, the Wells-Riley equation for modelling airborne infection in indoor environments is incorporated into a SEIR epidemic model - with a short incubation period - to simulate the transmission dynamics of airborne infectious diseases in ventilated rooms. Thanks to that model, the effect of the ventilation rate and the room occupancy can be examined and long-term impact of infection control measures can be assessed too.

For that study, two independent field experiments were carried out in mechanically ventilated shool classrooms receiving 100 % outdoor air. Outdoor air supply rate and filter condition were manipulated to modify IAQ. The performance of schoolwork was then measured. The conditions were established for one week at a time in a blind crossover design with repeated measures on two classes of 10 to 12 year old children. During exercices, pupils indicated their environmental preceptions and the intensity of any symptoms on visual analogue scales.

For that study, two independent field experiments were carried out in shool classrooms. The air temperature was modified either by operating or idling split cooling units installed in that aim. For one of those experiments the outdoor air supply rate was manipulated too. The conditions were established for one week at a time in a blind crossover design with repeated measures on two classes of 10 to 12 year old children. During exercices, pupils indicated their environmental preceptions and the intensity of any symptoms on visual analogue scales.

A coupled multizone-CFD program has been developed for that study with the aim to improve the multizone model by applying a CFD model to the poorly mixed zones and the multizone model to the remaining zones. By using experimental data, the coupled multizone-CFD program is validated. The calculated results obtained by the coupled program generally agreed with the experimental data, though discrepancies exist in some cases.

This paper frist reviews current and potential ventilation technologies (mechanical, natural, and passive) for residential buildings particularly for construction on North American climates. Then infiltration, duct systems, filtration options, noise and construction issues are examined too. Some of those systems go beyond the current standard by providing additional features such as air distribution or pressurization control, the market will decide the value of such features but Ashrae may consider related modifications to Standard 62.2.-2004 in the future.

For that study, an improved plum multilayer model was developed and validated to represent thermal transport in enclosures conditioned by radiant cooling and displacement ventilation systems. A new approach was developed to estimate wall plumes flow rates. The nonuniform wall plume flow rates predicted by the model agreed well with flow rates in an enclosure produced by CFD simulations.