Subjective experiments were conducted in summer and winter in order to clarify the effects ofhumidity and indoor chemical pollutants on subjective comfort and productivity, and evaluatethe seasonal differences in their reactions. Subjects were exposed to three levels of humidityconditions and 2 indoor air quality levels in a climate chamber performing the simulatedoffice works. For all conditions, SET* was constant. Subjects adapted to the indoor air qualityduring the 180-min exposures under the polluted conditions.
After moving into a new office building, employees complained about irritation of eyes, sorethroat and unspecific symptoms. A working group was appointed to investigate indoor airpollution.Air samples and floor dust samples for the analysis of organic compounds were collected inoffice rooms. Within 8 months, several measurement campaigns were conducted to assess thetrends of the concentrations of air pollutants.
The first survey of the ‘French permanent survey on Indoor Air Quality’ will start in 2003 on a random sample of 710 dwellings. To optimize the study cost, a ranking method was developed for prioritizing 70 pollutants including chemical and biological age
The term air conditioning not only prescribes comfort temperature and the relative humidity,but also the quality of air inside the room. Indoor air quality (IAQ) has become a concomitantof air conditioning. The pollutants generated inside the room affect the quality of air inside theroom. The major pollutants considered are CO2, sulfur dioxide, toluene, etc. Monitoring andcontrolling of all the pollutants is cumbersome. CO2 is considered as the surrogate index ofpollutants. Appendix D of the ASHRAE standards 62-1999 recommends a ventilation rate of15 cfm per person.
A number of different thermal manikins have been applied in literature to experimentallystudy the indoor environment. These manikins differ in size, shape and level of geometriccomplexity ranging from simple box or cylinder shaped thermal manikins to humanlikebreathing thermal manikins. None of the reported studies, however, deals with the influenceof geometry of the thermal manikin.
This paper investigates the pollutant distribution patterns in a ‘negative pressure’ isolation room by means of objective measurement and CFD modelling. The isolation room has two air supply diffusers and two extract grilles mounted in the ceiling. Numero
There is increasing evidence of a causal link between airborne particles and ill health and thisstudy examined the exposure to both airborne particles and the gas phase contaminants ofenvironmental tobacco smoke (ETS) in a bar. The work reported here utilized concurrent andcontinuous monitoring using real-time optical scattering personal samplers to recordparticulate (PM10) concentrations at two internal locations. Very high episodes were observedin seating areas compared with the bar area.
A study of the microclimate in four rooms in historic buildings reveals the different priorities,and, therefore, the different climatic data, needed by museum conservators, compared withpeople studying human welfare. In particular, it is important for conservators to know if a lowpollutant concentration indoors is due to a clean outdoor climate, a low air exchange rate orpollutant absorbent artwork on the interior walls of the building.
There is increasing evidence of a causal link between airborne particles and ill health and thisstudy monitored the exposure to both airborne particles and the gas phase contaminants ofenvironmental tobacco smoke (ETS) in a nightclub.The present study followed a number of pilot studies in which the human exposure toairborne particles in a nightclub was assessed and the spatio-temporal distribution of gas phasepollutants was evaluated in restaurants and pubs.
The aim of this work was to assess the influence of the ambient air quality and some indoorsources on the concentration levels of airborne fine particles and volatile organic compoundsin a large school of arts. Measurements were conducted, for both indoor and supply air, ineight office rooms in four floors controlled by four separate air handling units (AHU). Fineparticle measurements by SMPS in the size range 15-700 nm indicate that the placement ofthe HVAC air feed points and different AHUs affect the total particle concentration and sizedistribution in the supply air.
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