Since materials in building structures, and especially those applied to surfaces in largequantities, are permanently exposed to the indoor air, it is crucial to develop anunderstanding to what extent they contribute to indoor air pollution. Numerouslaboratory investigations have been reported concerning releases of chemicalsubstances from interior building materials. However, several of these substances areseldom associated with complaints or building related illness.

In reaction to the European Energy Performance of Buildings Directive (EPBD), existing and newlylanced standard developments by CEN (European Committee for Standardization) were harmonizedand synchronized, resulting in a set of about 50 standards addressing different aspects of the EPBDand the implementation of an overall building energy performance calculation method. A few of themaddress simulation issues:An overview of these is given, focusing on one standard covering system related aspects for buildingswith cooling, humidification or dehumidification.

Whether one considers the issues related to office workers’ well-being and productivity, or the issues from an energy and environmental perspective, there are clear evidences in favor of improving the quality of office built environment. This paper is con

Real time flow simulation is crucial in emergency management in buildings, such as fire or accidentalrelease of chemical/biological agents. Proper measures can be taken to minimize casualties withcorrect and timely prediction of the spread of the fire or contaminants. Although the traditional CFDsimulation in buildings is accurate, it is too time consuming. Multizone flow modeling is fast, but itsaccuracy is poor.

As the world trade field is expanding, international standard of air filter is urgently needed. At present,China is undergone its revising the national standards, therefore, the development of major air filterstandards between America and Europe is compared here. Diameter distribution of KCl aerosol used inASHRAE52.2 is similar with atmospheric dust, but research for test dust representing actual conditionis still needed. Concepts for electrostatic discharge between Europe and America are different, andclassification upon minimum life efficiency (MLE) is recommended.

Whether one considers the issues related to office workers’ well-being and productivity, or the issues from an energy and environmental perspective, there are clear evidences in favor of improving the quality of office built environment. This paper is con

Potentially-harmful chemicals could be released from many indoor materials, including consumerproducts and building materials, into indoor environments. Semi-volatile chemicals (SVOCs) due totheir lower vapor pressure, are often present, either primarily in indoor dust or in both indoor air andindoor dust. Several types of SVOCs have been measured in indoor air and indoor dust of Ottawaresidential homes.

How to model airflow discharged from diffuser is believed to be one of the key issues in ComputationalFluid Dynamics (CFD) applications to indoor air problem. Due to the complicated geometric feature andthe vortex-type airflow induced by swirl diffuser, simulating such a kind of diffuser is claimed to be achallenge. A simplified method of defining the boundary conditions at round swirl inlets is developedand introduced in this paper.

With growing concerns about the impact of indoor environment quality on office workers’ well-being and productivity, coupled with the concern over the rising energy costs for space heating and cooling in office building sector, ventilation principles that

In large enclosures such as gymnasiums, it is difficult to control the air temperature and create a comfortableclimate for people with respect to the heating condition. There are two main reasons that the air temperature in anoccupied area is not increased efficiently in large enclosures. 1) Hot supplied air goes up and stays in the upperarea due to buoyancy and it takes long time to reach the lower occupied area. 2) The heat capacity of the buildingstructure affects the air temperature and cold air stays in the lower area.