In a small case study involving an office room and a laboratory in a building equipped with aHVAC system VOC and particle samples were collected. Both rooms used for theexperiments were newly renovated and low, but measurable amounts of typical indoor VOCand SVOC were present in the air several weeks after finishing of the renovation work. TheVOC concentrations decreased slowly during the test period of 3 weeks.Particulate matter in the room air was characterized regarding the size distribution bySMPS.
The concentrations of ultra fine particles (UFPs) were measured in the medium-size city ofGothenburg, Sweden, in the large city of Copenhagen and at a rural site in Denmark. InGothenburg, field measurements were conducted both in several residential and officebuildings, while in Denmark measurements comprise two office buildings, one of themlocated at a rural site. Concentrations of UFPs were measured simultaneously indoors andoutdoors.
A study on pollutant dispersion and distribution inside public taxi transfer interchanges (TTIs)is reported. The pollutant levels inside TTIs are affected by many factors, for example, taxidata, climatic conditions, human activities and geometrical layout of TTIs. A sitemeasurement of respirable suspended particulate (RSP) level is carried out in a typical TTI inHong Kong. After analysing the effect of the above factors on RSP level, we propose to useartificial neural networks (ANNs) to study such phenomena.
Ultra-fine and fine particle formation as a result of chemical reactions between ozone and fourdifferent air fresheners and a typical lemon-scented domestic cleaner was studied in a fullyfurnished, naturally ventilated office. The study showed that under conditions representativeof those occurring in such offices, air fresheners or scented cleaners may react with ozone toform secondary organic aerosols (SOA). The tested air fresheners were relatively smallsources of SOA with detectable increases occurring only in the ultra-fine particle numberconcentration.
Characterization of indoor particle sources from 14 residential houses in Brisbane, Australia,was performed. The approximation of PM2.5 and the submicrometre particle numberconcentrations were measured simultaneously for more than 48 h in the kitchen of all thehouses by using a photometer (DustTrak) and a condensation particle counter (CPC),respectively. From the real time indoor particle concentration data and a diary of indooractivities, the indoor particle sources were identified.
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.
A cubic experimental chamber with 2.5m of sides was designed to measure the impact of the ventilation on particle concentration. Particles of 0.3 - 15µm diameter were used. Two ventilation parameters were studied: the ventilation rate (0.5 and 1.0 ach) an
Natural ventilation and infiltration are used for pollutant dilution and providing ‘fresh’ outdoor air supply in many buildings, in particular in residential buildings. Questions are often asked when natural ventilation should be encouraged. A balance-poi
The study has been carried out in two different French buildings. The main objective of the study was to know more about office buildings’ indoor air quality as well as HVAC installation working over a long period (1 year). A lot of data are available but
Indoor air is complex with its pollutants constantly changing (in time, spatial distribution and proportions). Furthermore distinction between organic compounds and particles becomes ambiguous.So developing a valid Indoor Air Pollution Indice becomes difficult : a symptom has usually different causes, and a given pollutant brings different effects alone or in combinaison with other kinds of exposure.