Though there is a developing interest in achieving low-energy, naturally ventilated, non-domestic buildings in order to achieve reductions in carbon dioxide emissions, those two case studies demonstrate that local authority Building Control Departments, fire authorities, insurers are reluctant finding some uncertainties about compliance of natural ventilation with the current fire regulations and codes. So the current regulatory system impacts negatively in the use of natural ventilation and prevents innovation.

The aim of that paper is the analysis of the airflow field and pressure distribution of standard mechanical interface (SMIF) enclosure in the semiconductor factory cleanroom on the one hand and the investigation of the air cleanliness inside the mini-environment. Results and conclusions are presented.

Air handling units must be added in typical HVAC systems to remove indoor air pollutants, such as volatile organic compounds (VOCs). The aim of that paper is to investigate the VOC removal efficiency of a photocatalytic filter in a HVAC system. The resullts of the experiments carried out in a stainless steel chamber are presented. It appears that photocatalytic oxidation is an attractive technique for indoor air cleaning.

The investigation in a room served by displacement ventilation system of the effect of temperature gradient on overall and local thermal comfort at different overall thermal sensations and room air temperatures was the aim of that study. It appears that temperature gradient has different influences on thermal comfort at different overall thermal sensations.

The aim of thsi paper is to study the effect of five ventilation strategies on the concentrations of VOCs emitted from a new carpet in an apartment with the VOCs emission characteristics taken from chamber test data. Numerical results show that ventilation strategies have small effect on VOCs emission from carpet.

Field measurements were conducted first in two Korean high-rise residential buildings to show and understand the characteristics of pressure difference and problems due du stack effect. Then a simulation of several high-rise buildings was made to confirm those characteristics and problems. It appears that most of the stack pressure difference acts on interior partitions rather than on exterior walls. A solution is proposed to solve the pressure difference problems.

A mathematical model has been developed to simulate airflow control systems of ventilation units, then implemented. The simulations results are compared with the experimental results and with data obtained from analytical predictions too. Finally, the results of simulations of the entire ventilation unit control system for two different types of loading conditions are provided.

The transient natural ventilation of a warm room is investigated in this paper. The authors developed a simple model to describe the transient oscillatory process. The application of the model is then discussed and demonstrates how pre-cooled draining maybe employed appropriately to provide thermal comfort in a room not occupied permanently.

The authors focused on the evaluation of the optimal temperature in each cabin of the Korean maritime patrol vessels. Based on human factors, the optimum temperature was 23C in the wheelhouse and 29C in the accommodation. So 6 C of energy can be saved in case of PMV/PPD-based air conditioning.

To learn more about indoor PM concentrations and associated health risks in schools, data has been collected on indoor air climate parameters in German classrooms (92 in winter 2004-2005 and 75 in summer 2005) only during teaching hours. The results showed that exposure to particulate matter in school is high. Further investigations are necessary to assess the toxic potential of indoor particles and develop strategies to ensure a better IAQ in schools.