For that study, two types of air terminal devices for a personalized ventilation (PV) system in conjunction with either a mixing or a displacement total-volume ventilation system were installed in a mock-up of an office. The performances of those PV systems were studied in regard to inhaled air quality and thermal comfort as well as the transport of pollution within the occupied zone and between occupants.

That study about the development of new convection correlations for rooms with cooled ceiling (CC) panels has two main objectives : - to develop convection correlations for the CC surfaces in rooms with only natural ventilation. - to quantify the influence of the high aspiration diffuser on convection at cooled ceiling surfaces as well as at other wall and floor surfaces.

In the second part of this paper a simple two-way simulation method is implemented using CFD software to obtain the multiplicity behavior of laminar and turbulent indoor airflows in two-zone naturally ventilated buildings. The method used proved effective in detecting and isolating multiple solutions for different building geometries. The results and simulation data are expected to be useful for building ventilation design and smoke control engineering.

The first part of this paper is a presentation of a simple method using commercial CFD software to obtain the solution multiplicity characteristics of laminar and turbulent indoor airflows.A two-zone naturally ventilated building with four openings is considered in that study. Nonlinear dynamic behaviors are analyzed. Different flow modes were identified with the same physical and boundary conditions. A multi-zone airflow and thermal coupled program was also used to evaluate the results.That theroretical analysis can help to properly design natural ventilation in real buildings.

The aim of that study was to evaluate the environment's thermal conditions so as to indentify the comfort and localized discomfort conditions in office buildings with underfloor air supply systems.Parameters of thermal comfort and of system operation are presented in this paper. The results of that research show that thermal conditions created by the underfloor air supply system fulfill the thermal comfort requirements and can be used as a guideline for air-conditioning systems with underfloor air supply designs.

For that study 60 subjects in groups of six, were exposed for five hours to two levels of air pollution, four levels of absolute air humidity, and three air temperatures . These conditions were established simultaneously in two adjacent climate chambers (one with clean air, and the other with air polluted by carpet and linoleum). Nine objective medical tests of eye, nose and skin function were applied. The results and conclusion are presented.

For the removal of volatile organic compounds (VOCs), zeolites can be used. This paper deals with the removal performance of toluene in gas phase. A filtration system using zeolite at different ozone concentrations and moisture conditions has been investigated. The experimental results are presented.

The tests were made in a empty experimental surgical room for pre clinical animal research. The measurements were made with 3 filters efficiency : 65 %, 85 % and HEPA filter, according to ASHRAE conditions. The particle samples were taken at the upstream of the air conditioning system and on the operating table. Data collection were done the same day. The results show that the particle concentration is dominated by the smaller particles, so the use of high efficiency filtration is the best alternative.

Activated carbon filters have been installed within the air handling unit of an HVAC system feeding 100% fresh air to an office building. The filters efficiency against ozone (O3) and nitrogen oxides (NO2 and NO) as function of time and outdoor air parameters (temperature, relative humidity) has been measured continuously over a one-year period. The results show that the filters efficiency is high (generally between 70 to 90 %) and varies along time with temperature and relative humidity of air.

The purpose of this study was to investigate the sensory emission load from an alternative ventiltion bag filter with activated charcoal lining and to compare it with a used bag filter. The two types of filter have been used during three months in the same building, under the same conditions. Samples have been sent to a controlled laboratory environmentfor chemical measurements. The results confirmed that the sensory pollution load of the alternative filter is significantly lower than the commonly used ventilation bag filter.