This article examines the effectiveness of air cleaners ranging from portable to duct-mounted devices and lists a variety of technologies that claim to remove particulate matter, chemicals/odors, VOCs and other pollutants. Determination of performance indices and summary of test results are presented.
In this article, models for estimating how the indoor environment quantitatively affects sick leave and work performance are presented. Working environment, facility services, personal motivation, psychological aspects are factors, other than IEQ, that affect work performance too.
Standard 62 was first published in 1973, the latest version designated as 62.1 was published in 2004 . Throughout its existence, that standard has generated controversy on the one hand and has served the building industry for ventilation and IAQ on the other hand. This article attempts to explain some of the concerns regarding that standard, and to counter some of the issues that have been raised.
Ultrafine particle (UFP) exposures can cause oxidative stress and inflammation in the lungs. The objective of that study was to examine the contribution of home heating systems such as electric baseboard heaters, wood stoves, forced-air oil/natural gas furnace, to indoor UFP exposures. The results of the cross-sectional survey conducted in 36 homes in the cities of Montreal, Quebec and Pembroke are presented. The authors' findings suggest that home heating systems are not important determinants of indoor UFP exposures.
15 single-family houses with attached garages in southeast Michigan have been investigated for that study whose aim was to characterize VOC concentrations, exposures, airflows, and source apportionments.39 VOC species were detected indoors, 36 in the garage, and 20 in ambiant air. Garagz/indoor ratios and multizone IAQ models show that nearly all of the benzene and most of the fuel-related aromatics in the houses resulted from garage sources. Their conclusion are presented.
Indoor air quality and occupancy levels were investigated in seventeen bars , before and after the smoking ban that took effect on September 1, 2005 in Austin, Texas. Number of occupants, number of lit cigarettes, temperature, relative humidity, room volume, PM 2.5, CO and CO2 concentrations have been measured for that study. Results and conclusions are presented.
This is one of two CLIMA 2007 papers on gas phase air cleaning by this author. The Science of Gas Phase Air Cleaning’ covers aspects of air quality, gas phase air cleaning (particularly adsorption) limitations and opportunities, capital and energy saving
Limited data exist on indoor air and environmental quality (IEQ) in schools, and how IEQ affects students’ health or performance in China. Research was conducted in different types of indoor environments in a university to explore possible relationship. I
Due to criteria for building energy efficiency today’s buildings are better insulated and the envelope is more air tight. These improvements have led to a more comfortable buildings and lower running costs. However, the new indoor environments are more de
There is pronounced interest of engineers in new systems for storey smoke control system.The operational principle of this system is based on independent smoke removal from each storey. Independent ducts with fans and outlets are built for each floor of the building. For this approach it is important to safety remove smoke from the building. One of the proposed approaches is to use nozzle type outlets characterized with high flow and velocity to evacuate combustion products from the building.
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