The purpose of this investigation is to know the present status of indoor air chemical pollution byVOCs in Japanese houses. The concentrations of formaldehyde, toluene, xylene, ethyl-benzene,styrene and acetaldehyde were measured in ten thousand built houses from 2000 to 2005. And thefollowing results were obtained. In 2000, the indoor concentrations of formaldehyde exceeded theguideline established by the Ministry of Health, Labor and Welfare of Japanese Government at thepercentage of 27%. And In the case of toluene the percentage was 12 %.

Blinds are used widely in numerous buildings to conserve energy and provide for occupants’ comfort in the perimeter zone. But manual or motorized blinds are limited in their ability to reduce energy consumption because occupants must control blinds themse

The thermal performance of the building envelope is mainly required for guaranteeing a comfortableand hygienic interior climate. A roof is a part of the building envelope which provides protection from thethermal damage of the sun. To improve this protection ability, we can consider using a ventilated roof,which has a ventilation layer known as a cavity, beneath the roof cover panel.The objective of this study is to evaluate the influence of such factors as the slope of the roof, size orshape of the openings (i.e.

Conventional multiple types of perfluorocarbon tracers use the number of gases equal to the number of zones (n). The possible n×n+n airflows are solved from the mass balance of the gas and the airflow balance. However, some airflows may not occur because

Heating and cooling of buildings may be done by water based radiant systems, where pipes areembedded in the concrete slabs between each storey. Hundreds of buildings with such systems arenow being constructed or are in operation in Europe.Because these types of systems are using the building mass for heating and cooling it is oftenquestioned how the systems should be controlled and operated. The present paper presents aparametric study of different control and operation concepts for both cooling (summer) and heating(winter) periods.

The indoor air quality management of the railroad passenger cabin is a hot environmental issue inmany countries. Especially, particulate matters are known to be harmful for lung and bronchus, andhigh concentration of carbon dioxide may cause headache and dizziness. Therefore, new regulation tolimit the particulate matters and carbon dioxide concentrations in the railroad passenger cabin is underpreparation in Korea. In this study, a new concept of an integrated novel air cleaning system for railroadpassenger cabin was suggested.

This research determines chemical substance removal rates of domestic air cleaners using with thepollutant constant-emission test. In previous studies, we have already reported the formaldehyderemoval rates of room air cleaners and the high accuracy of our method for predicting indoor pollutantconcentration. In the present study, the VOCs removal rates of room air cleaners were measured.Gas-phase contaminants were supplied to the environmental test-chamber using a custom-builtemission device. And performance evaluation test was conducted to two kinds of air cleaners.

The International Organization for standardization (ISO), Technical Committee 163 "ThermalPerformance and Energy Use in the Built Environment" (ISO/TC 163) is dealing with development oftools that can be used to design and construct or retrofit energy efficient buildings and installations. Theoverall aim for this is to reduce our dependency of non-renewable resources and to reduce theemission of harmful substances to the air. Methods are needed for the evaluation of the energyperformance of complete buildings and parts of buildings or building installations.

Home electrical appliances release hazardous chemical substances produced by the effects of heatingduring their operation. The present study investigated the emission rates of chemical substances onhome electrical appliances such as microwave ovens, vacuum cleaners, electric heaters, electricblankets, multimedia players, electronic dictionaries, MD players and notebook PCs.The VOCs emission rates of comparatively small products were measured using a small-scaleenvironmental chamber with a volume of 0.065 [m3].

In approach to alleviating the problems causing ‘sick building syndrome’, many types of indoor air pollution removal products have been developed. In the various performance evaluation methods for these removal products, the pollutant constant-emission te