A re-analysis of a study was made : it concerned 10 groups of 6 female subjects performing office tasks at their own pace during several hours exposures to 6 different air quality conditions. That re-analysis showed that CO2 produced by subjects at each air quality level was affected by air-quality. A change in breathing pattern or a slow down of work rate in polluted air would reduce both metabolic rate and thus the CO2 production rate.
In the literature, different measuring methods around the odour intensity, the perceived air quality and the hedonic sensation of odours exists.The new two step approach for the assessment of the perceived air quality separates clearly intensity measurements of odours and acceptance methods. Thanks to it a possible link of the two measurement methods is shown.
This paper analyses HVAC systems and their possibilities to face risks in case of environmental emergencies. For the author well designed systems are capable of providing protection if equipped with a recirculation option and with the best possible air cleaning facilities.
In this paper, current ECS (Environmental Control Systems) have been studied and the risks have been emphasized regarding to air pollutants, health and comfort within the context of indoor air quality. The factors that influence IAQ in aircrafts are presented : pressure, oxygen, temperature, humidity and air contaminants along with the physiological problems that could be caused by atmosphere such as hypoxia, deep vein thrombosis, transmission of infections.
Most European countries have made large progress in reduction of energy consumption in the housing sector during the last two decades. However, much more can be achieved, as has been shown in Germany and Austria by thousands of Passive Houses. By definition, passive houses do not exceed an energy consumption of 15 kWh per square metre floor area per year for heating purposes. No separate heating system is required. The house can be kept comfortable by adding a small amount of heat to the ventilation air.
This paper describes in detail draft Government guidance on the ventilation of buildings in England and Wales. This guidance is fundamentally based on indoor air quality criteria so as to limit the build-up of moisture and other pollutants which would otherwise affect the occupants health. The guidance provides the building designer with a choice of three approaches. The first approach is to meet specified performance criteria. These are typically levels of air pollutants that should not be exceeded.
European Directive for Energy Performance of Buildings was approved in the beginning of 2003. The transition period is 3-6 years depending of the article. European Standardisation Organisation (CEN) has drafted several standards to help the member countries implementing the directive. One of these is the Criteria for the indoor environment including thermal, indoor air quality (ventilation) light and noise. The standard specifies design values of indoor environment, values to be used in energy calculations, and methods how to verify the specified indoor environment in the buildings.
This paper gives a sum up of the results of performance testing in an IEQ (indoor environment quality) chamber built in Shanghai Research Institute of Building Science (SRIBS).
A field study was conducted in Shangaï, China in 200 and 2001 on thermal comfort in non-air-conditioned buildings. Around 1800 office workers answered a questionnaire , and measurements were made simultaneously. The authors explored if it is justifiable f
This paper compares different ways to reach a spatial temperature distribution inside living and working spaces for industrial or technological use such as drying and conditioning chambers, sterilizers etc.
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