The main results of 3 studies on the measurment of the indoor air pollution are presented in this paper. The first article deals with NO2 concentrations in houses, the second one on passive tobacco nuisance that is widely spread and at important degrees and the last one on particle concentrations after the falling of the World Trade Center Towers in New York city. This paper shows the complexity of indoor air pollution phenomena.

The aim of the authors is to study the differences of indoor air quality between 8 different office buildings along with the different individual exposition between the occupants of the same building. That study lasted 5 months. The results of the measurements have shown that except for ozone, the concentrations of all the measured pollutants are low and that there are more variations between people than between buildings.

The author relates first the history of the cabin air filters then he presents different test methods for the cabin air filters : among them a test method by olfactometry. Finally the Freudenberg offer is presented showing the results of efficiency measurement of activated carbons and fractional efficiency of particulate medium insisting on the efficency of the filtration for particles whose diameter is less than 2.5 micrometers.

This study has demonstrated that the microperforated duct is highly qualified if moderate requirements for the ventilation features and high standards for the absorption characteristic are concerned.In addition, the microperforated ducts allows for draft free ventilation concepts along with a reduction of the sound level of interior noise sources . Experimental evidence is provided in that study.

In this study, CFD models are used to test the performance of alternate design strategies as applied to a single data space. Specifically, a shell space is taken through a design process that leads to two separate designs for data center cooling one using overhead supply air distribution, the other using an underfloor supply air plenum. Then, using methods developed by Sharma, Bash, and Chandrakant (Dimensionless Parameters for Evaluation of Thermal Design and Performance of

The annual costs of energy and maintenance in running a heating, ventilating, and air-conditioning (HVAC) system and life-cycle costs (LCC) of investments for improving air quality in an office building were compared with the resulting revenues from increased office productivity as a consequence of

This paper presents recent findings on the impact of temperature and ventilation on call-handling performance and selected sick building syndrome symptoms of call center operators near thermal neutral conditions. The blind intervention study was conducted in two call centers in the Tropics

Indoor temperature is one of the fundamental characteristics of the indoor environment. It can be controlled with a degree of accuracy dependent on the building and its HVAC system. The purpose of this study was to evaluate the potential benefits of improved temperature control and apply the information to a cost-benefit analysis. The indoor temperature affects several human responses, including thermal comfort, perceived air quality, symptoms of sick building syndrome, and performance at work. In this study, we focused on the effects of temperature on performance at work.

A deteriorated indoor climate is commonly related to increases in sick building syndrome (SBS) symptoms, respiratory illnesses, sick leave, reduced comfort, and losses in productivity. The cost of this for society is high. Some calculations show that the cost is higher than the heating energy

The objective of this paper is to demonstrate the value of using performance-based design techniques in the design of atrium smoke management systems. This approach can reduceproposed smoke exhaust flow rates frequently by more than a factor of two of the initial code-calculated values. The reduction in exhaust flow rates can save money in terms of reducingthe size of the fans and related emergency power systems. The reduction in exhaust flow rates leads to a reduction in makeup air quantities.