The aim of the project described in this paper is to investigate the effect of indoor air quality and ventilation rates on pupils’ performance and health using psychological tests on the one hand and to recommend suitable ventilation rates for classrooms

In this paper the concentration of CO2 is taken as an index of personnel contamination and the concentration of TVOC as an index of building contamination, which meets the needs of energy saving and indoor air quality improvement through air conditioning fresh air random control.

The paper demonstrates the application of a new index that provides a practical and quantitative evaluation of building ventilation effectiveness. It allows the judging of the ventilation performance of a displacement ventilation system in a building complex, with the contaminant concentration data obtained from numerical experiments.

IAQ based demand controlled ventilation (DCV) is the subject of th where CO2 concentration is the subject of that paper where CO2 concentration is used as the controlling index of human produced contamination , and TVOC concentration as the controlling index of building produced contamination.

This paper deals with uncertainty in IAQ performance assessment of a naturally ventilated building in case of combined influence of the stochastic behaviour of both weather parameters and occupancy.

In this paper , a new index is defined to analyse effectiveness of ventilation systems with different airflow rates CFD simulations are realised with different mechanical exhaust systems in a kitchen. The coupled analysis of this new index and of the airflow rate ratio allows the analysis of the contaminant removal effectiveness while considering the energetic cost of ventilation.

This study examines the effect of building recirculation rates on the concentrations of secondary organic aerosol (SOA) resulting from reactions between indoor limonene and ozone.

For that study, an underfloor ventilation system providing two different airflow patterns (short and long throw) was tested and compared with a mixing and displacement ventilation system in a mock-up of a typical office. The systems were operated under identical conditions.
The authors conclude that an underfloor ventilation system providing a short throw can ensure both a high air quality (comparable to displacement ventilation), while providing a low risk of thermal discomfort for occupants.

HVAC systems in two hotel buildings in Pyongyang have been surveyed from 1997 to 2002 to check the effectiveness of combined mechanical cleaning and duct disinfections against microbial contamination..There were many differences of microbial contamination between the two HVAC systems during 1997-1998. respectively for bacteria and fungi in the air outlet . But they decreased from 45.9 and 28.7 cfu/m3 during 1997-1998 year to 10.3 and 4.5 cfu/m3 during 1999-2002 year

This investigation involves full-scale experiments with two breathing thermal manikins in a room ventilated by an air distribution system based on a textile terminal extended by a personalized ventilation system . The aim is to study the improved protection of people in a room..
It appears that the flow in the room is fully mixed with a limited protection of the occupants when the air is supplied from the textile terminal alone, .and the personalized ventilation improves the protection of occupants when the personal exposure index is increased.