English

Field studies have been carried out in an existing kitchen to investigate the effects of gas stoves on indoor environment. Laboratory measurements were carried out according a similar process : Determination of filtration, Emission rate measuring, Determination of pollution loads, Thermal comfort measurements, Evaluation of local exhaust system. Results and conclusions are presented

A ventilation system effective to solve the SBS problems has been developed : it consists in a circulating ventilation system with air cleaning units that reduce indoor contaminant concentration without increasing the amount of air supply. The aim of that study is to determine the formaldehyde and VOC removal rates of that ventilation system. A constant-emission test in environmental chambers has been used for the experiments.

Photoacoustic spectroscopy (PAS) and the tracer gas techniques were used for the testing of indoor air quality and ventilation in nine Spanish office buildings during a 15 day period in May. Those experimental results have been analysed and conclusions are presented in this paper.

This paper points out the benefits of on-going testing of building materials. This allow to learn more about the decay or rise of building-related and occupant-related indoor air chemicals. Results, discussion and lessons learned from those product testing, source evaluation and air sampling are presented.

Measurements of physical, chemical and microbiological parameters were carried out in three classrooms of a school in Porto. They were conducted in winter, spring and summer twice a week. The results are presented. Low ventilation and high number of students per classroom are responsible for the high concentration of CO2.

This paper sums up the findings from three current analyses of BASE data. Using multivariate logistic regression models, the authors found increasing occupant symptoms associated with building related factors. The method, results and discussion are presented.

Research in 88 central Florida commercial buildings during the last decade has found that 26% of the air distribution systems had substantially unbalanced return air. Unbalanced return air occurs when there is a restriction to airflow between the supply discharge and the return air, creating positive and negative pressure fields throughout the building.

The objective of this field investigation was to compare the impacts on thermal comfort due to vertical location of return air inlets in a residential forced-air system operating in the cooling mode. Design guidelines for forced-air cooling systems recommend placing return air inlet locations above
the occupied zone in order to improve circulation of stagnant air and reduce thermal stratification. A companion study of the heating mode is under way. Results from the research will be used to recommend optimal return air inlet locations for yearround performance.

In this study, computational fluid dynamics (CFD) models are used to evaluate how ceiling height affects the overall performance of the air distribution system within a data center environment. First, an underfloor air delivery system is examined while keeping all operational parameters constant and

Contamination sources and prevention is a topic that all facility planners and designers must consider in the data processing environment. Contaminants can be grouped into one of three categories: gaseous, solids (particulates) and liquids. Although very small and at times not easily seen without the aid of magnifying lenses or laboratory analysis, contamination can have a disastrous impact on equipment reliability and availability. Information technology (IT) equipment