In the second part of this paper the technique that allows the direct measurement of Q4 to reduce the uncertainty by a factor of three or more is described. The key factors are : measurement of Dp a short time before and after the pulse, choice of the shape and duration of the pulse, minimising the variation of Dp during the quasi-steady period. Example of measurements are presented and comparisons are made too between the new technique, the conventional steady one and a theoretical model. Results and conclusions are presented.

The uncertainties inherent in the determination of the low-pressure leakage of building envelope are examined in the first part of that paper. High pressure data (50 Pa) is a procedure currently used as a measure of the infiltration potential of an envelope. But in reality infiltration occurs at much lower pressures (4 Pa) so large uncertainties are inherent in the current procedures. A technique for direct measurement of Q4 could reduce the uncertainty by a factor of three or more.

A better ventilation is an important measure that can reduce the acute respiratory infections (ARI) linked to the biomass solid fuel smoke. In 200, an explorative study was carried out in 51 households selected, at random , in a health district in Burkina Faso. Improving indoor ventilation, along with the cooking devices and their location reduced the fraction of ARI for children under 5 years, but the higher reduction was achieved by cooking outdoors.

The aim of that paper is to investigate the mutual effect of local and overall thermal sensation and comfort in a displacement ventilation environment system in the tropics. For the experiments, 60 subjects were engaged in sedentary office work for 3 hours. They were exposed to three vertical air temperature gradients and three room air temperatures. The results and conclusions are presented.

One part of this paper deals with the contribution of the products of consumption on indoor air pollution and the available data collected in that field . The second part deals with the methodology used to evaluate the sanitory characteristics of the buildings materials.

The investigation of the performance and energy saving of dessicant air-conditioning system was the aim of that study. That type of sytem is well-known in thailand, it is composed of a silica gel bed, a split type air-conditioner, air ducts and a blower. For that experimental analysis, tests were conducted during several days with relatively similar ambient conditions. The percentages of return air, outdoor air , indoor air mixed to the air leaving the dessicant and dessicant bed thickness have been adjusted. The results of that simple economic analysis are presented.

In this paper a methodology has been developed to estimate schedules for generation rates and flow parameters using short term testing. Two techniques were evaluated using simulated data. The preferred parameter estimation method - providing average hourly source generation rates and day-to-day variations - was applied to three different types of commercial buildings. Predictions and field measurements were compared.

The way outdoor air is distributed in classrooms has a major impact on IAQ and thermal comfort of pupils. In this paper the indoor environment in the classroom is investigated using confluent jet ventilation. Measurement of air speed, air temperature and tracer gas concentrations have been carried out under different conditions along with CFD simulations to provide additional information on IAQ and thermal comfort. Those results are compared.

For that paper, experimental and numerical studies on thermal comfort and indoor air quality were performed in a lecture room with cooling loads when the operating conditions are changed. The results have been compared and showed a reasonable agreement with each other. From those results, the authors found that the increment of the discharge angle of 4-way cassette-air conditioner makes uniformity of the thermal comfort worse, but scarcely affects IAQ. The variation of the discharge airflow rarely affected thermal comfort and IAQ

A chair-based personalized ventilation system that can potentially be applied in theatres, cinemas, aircrafts and even offices is the subject of that experimental study. For the experiments eight different air terminal devices (ATDs) were compared, the perceived air quality improved greatly when cool air was served directly to the breathing zone. Future applications of that ventilation system can be envisaged.