Clearing the Air: Advances in Affordable Filtration for IAQ
Considering that a majority of the worlds population lives in urban areas where outdoor air does not meet local, regional, and/or national air quality standards, it seems intuitive that occupied spaces ventilated with outdoor air that is considered to be unacceptable according to these standards are subject to reduced air quality when this air is not cleaned prior to introduction to these spaces. However, many buildings provide no more air cleaning than the simple dust filters that were supplied with the HVAC system. Fortunately, air cleaning technologies have evolved to the point that the IAQ professional has a viable means of providing a healthy, comfortable indoor environment. Further, ventilation standards and mechanical codes have similarly evolved with an eye on IAQ and how best to achieve an acceptable indoor environment. Increasingly, air cleaning is being used to provide and maintain acceptable IAQ in commercial buildings with many options available for the control of particulate pollutants, and nearly as many options for the control of gaseous pollutants. Employing air filtration systems as an integral part of an HVAC system can effectively reduce airborne contaminants to well below standard levels, but effective control of environmental pollutants requires the use of a filtration system optimized for both particulate and chemical removal. Use in either recirculation or mixed recirculation and outdoor air flows is effective for controlling undesirable contaminants and has the potential for conserving energy. This paper will present an overview of several countriesambient air quality standards, what contaminants are being measured, and what criteria are used to determine acceptability. Examples of local air quality data will be provided along with a discussion of suitable air cleaning technologies. This will include some of the more effective air cleaning options available today as well as some of the more promising emerging technologies. Cost considerations will be presented along with the potential energy savings possible allowed with existing ventilation standards.
Air cleaning Air pollution Air quality standards Gas-phase air filtration IAQ
Christopher O. Muller Larry Jin
Purafil,Inc.,Doraville,Georgia,USA purafil Asia,Beijing,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
1473-1481
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）