English

A continuous monitoring of air quality parameters in 85 classrooms in Minnesota during one year has been done. Monthly reports of results helped the school personnel in planning and improving air quality when necessary. That study shows that thanks to a group of motivated shcols, unobtrusive monitoring and a regular measurement of air quality parameters, a significant improvement of IAQ can be done.

This paper is an analysis of the measured outdoor air ventilation rates from the US EPABASE study that involved indoor environmental measurements, including ventilation, in 100 US office building using a standardized protocol. The results are compared with the requirements of the Ashrae Standard 62-2001.

The new concept using continuous unipolar ion emission has proved its efficiency on facepiece respirators. So it has been applied to conventional HVAC filters, and the laboratory study demonstrates that it works well too. The enhancement effect depends on the filter type and on the distance from the ion emitter to the filter surface.The explanation of those results is presented

For that study, a simple theoretical model has been developed for the prediction of the time taken to flush neutrally-buoyant pollutants from a naturally ventilated room. The flow is driven by localised heat inputs. It appears that the rate of flushing depends on the room volume. The predicted flushing times tally with the experiments.

This paper deals with the cooling of air in raised-floor data centers mainly used for housing computer and telecommunication equipment. To cool properly that type of equipment, the cooling air through perforated tiles must be adequately distributed. A one-dimensional computational model allow the study of the airflow distribution. The results presented provide an understanding of the fundamental fluid mechanical processes that control the airflow distribution through the perforated tiles.

A thermal comfort study is presented in this paper, a thermal manikin with a female body and 26 individually heated and controlled body segments is used in a field environment chamber. The aim of that study was to assess thermally non-uniform environment served by DV system using the manikin on the one hand, and to correlate the subjective responses of the sujects with measurements from the manikin.

Test standards for particulate and gaseous contaminant air filters in general ventilation systems are discussed in that paper along with filter rating systems for particulate filters as they are to be understood by filter specifiers too.

The aim of that study is to evaluate the influence of temperature gradient and room air temperature (at 0.6 m height) on percieved air quality and Sick Building Syndrome in DV environment.

That study proposes an Express Assessment Protocol (EAP) to quantify IAQ problems by assessing the "dominant" contributors to unacceptable IAQ. That EAP could be a useful tool for policymakers, building owners and professionals to quantify IAQ problems in offices and to make improved decisions.

Ultraviolet germicidal irradiation (UVGI) had been used with success to decontaminate the air in hospital operating rooms and ventilation systems. So, Mc Gill Researchers hoped to reduce the levels of workrelated illness in offices by using Sanuvox UV coilcleaners, too. In that aim, they have been studying the effects of those UV coilcleaners in three Montreal offices during 48 weeks on 771 employees. For that double blind study the Sanuvos purifiers were alternatively turned on (4 weeks) then turned off (12 weeks) with that cycle repeated 3 times for a year.