ASHRAE Journal - March 2009 - (Page 64) Figure 1a (left): New F7 (~MERV13) ἀberglass bag ἀlter. Figure 1b (right): The same ἀlter after ἀve months of continuous operation. Used Filters By Gabriel Bekö, Ph.D. And Indoor Air Quality T he presence of used filters in a ventilation system can have an adverse impact on perceived air quality, Sick Building Syndrome symptoms, and performance of office work. This article briefly summarizes earlier works leading to this conclusion, as well as reviews our more recent studies performed to gain better understanding of this problem. Possible mechanisms responsible for the emission of noxious compounds from ventilation filters are described. Finally, the economic impact of polluting ventilation filters and possible engineering solutions are discussed. Mechanical ventilation systems are commonly used to ensure that ventilation standards and guidelines are met. However, studies have documented that building occupants, especially in older and mechanically ventilated buildings, 64 ASHRAE Journal productivity.4,5 The prevalence of asthma and allergic diseases has increased during the past decades, most likely due to changes in environmental exposure. 6 Many of the particles either generated indoors or entering the buildings from outdoors can trigger allergic reactions, asthma, and upper and lower respiratory symptoms.7 Moreover, epidemiological studies report close association between outdoor airborne particles and mortality and morbidity.8 Particulate pollutants (smoke, dust f ibers, bioaerosols such as viruses, bacteria, and microorganisms) and gaseous pollutants may enter the buildings About the Author Gabriel Bekö, Ph.D., is a post-doctoral research fellow at the International Centre for Indoor Environment and Energy, Department of Civil Engineering, Technical University of Denmark in Lyngby, Denmark. consider the indoor air quality unacceptable and suffer from Sick Building Syndrome (SBS) symptoms, sometimes referred to as Building-Related Symptoms (BRS).1,2,3 Consequently, poor air quality can negatively affect occupants’ ashrae.org March 2009 http://www.ashrae.org
Table of Contents Feed for the Digital Edition of ASHRAE Journal - March 2009 Contents Commentary Industry News Letters Meetings and Shows Special Section 2009 ASHRAE Technology Awards Feature Articles Heat Recovery for Office Tower Air Motion Control in the Hospital Operating Room Anniversary Feature: Five Defrost Methods for Commercial Refrigeration Groundwater Issues: Commercial Open Loop Heat Pump Systems Used Filters and Indoor Air Quality Building Sciences Emerging Technologies Washington Report Products Special Products People Classified Advertising Advertising Index ASHRAE Journal - March 2009 ASHRAE Journal - March 2009 - (Page Cover1) ASHRAE Journal - March 2009 - (Page Cover2) ASHRAE Journal - March 2009 - (Page 1) ASHRAE Journal - March 2009 - (Page 2) ASHRAE Journal - March 2009 - Contents (Page 3) ASHRAE Journal - March 2009 - Contents (Page 4) ASHRAE Journal - March 2009 - Commentary (Page 5) ASHRAE Journal - March 2009 - Industry News (Page 6) ASHRAE Journal - March 2009 - Industry News (Page 7) ASHRAE Journal - March 2009 - Industry News (Page 8) ASHRAE Journal - March 2009 - Industry News (Page 9) ASHRAE Journal - March 2009 - Letters (Page 10) ASHRAE Journal - March 2009 - Letters (Page 11) ASHRAE Journal - March 2009 - Letters (Page 12) ASHRAE Journal - March 2009 - Letters (Page 13) ASHRAE Journal - March 2009 - Meetings and Shows (Page 14) ASHRAE Journal - March 2009 - Meetings and Shows (Page 15) ASHRAE Journal - March 2009 - 2009 ASHRAE Technology Awards (Page 16) ASHRAE Journal - March 2009 - 2009 ASHRAE Technology Awards (Page 17) ASHRAE Journal - March 2009 - 2009 ASHRAE Technology Awards (Page 18) ASHRAE Journal - March 2009 - 2009 ASHRAE Technology Awards (Page 19) ASHRAE Journal - March 2009 - 2009 ASHRAE Technology Awards (Page 20) ASHRAE Journal - March 2009 - 2009 ASHRAE Technology Awards (Page 21) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 22) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 23) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 24) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 25) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 26) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 27) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 28) ASHRAE Journal - March 2009 - Heat Recovery for Office Tower (Page 29) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 30) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 31) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 32) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 32A) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 32B) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 32C) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 32D) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 32E) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 32F) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 33) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 34) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 35) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 36) ASHRAE Journal - March 2009 - Air Motion Control in the Hospital Operating Room (Page 37) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 38) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 39) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 40) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 41) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 42) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 43) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 44) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 45) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 46) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 47) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 48) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 49) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 49A) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 49B) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 50) ASHRAE Journal - March 2009 - Anniversary Feature: Five Defrost Methods for Commercial Refrigeration (Page 51) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 52) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 53) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 54) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 55) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 56) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 57) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 58) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 59) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 60) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 61) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 62) ASHRAE Journal - March 2009 - Groundwater Issues: Commercial Open Loop Heat Pump Systems (Page 63) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 64) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 65) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 66) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 67) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 68) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 69) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 70) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 71) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 72) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 73) ASHRAE Journal - March 2009 - Used Filters and Indoor Air Quality (Page 74) ASHRAE Journal - March 2009 - Building Sciences (Page 75) ASHRAE Journal - March 2009 - Building Sciences (Page 76) ASHRAE Journal - March 2009 - Building Sciences (Page 77) ASHRAE Journal - March 2009 - Building Sciences (Page 78) ASHRAE Journal - March 2009 - Building Sciences (Page 79) ASHRAE Journal - March 2009 - Emerging Technologies (Page 80) ASHRAE Journal - March 2009 - Emerging Technologies (Page 81) ASHRAE Journal - March 2009 - Emerging Technologies (Page 82) ASHRAE Journal - March 2009 - Emerging Technologies (Page 83) ASHRAE Journal - March 2009 - Emerging Technologies (Page 84) ASHRAE Journal - March 2009 - Emerging Technologies (Page 85) ASHRAE Journal - March 2009 - Emerging Technologies (Page 86) ASHRAE Journal - March 2009 - Washington Report (Page 87) ASHRAE Journal - March 2009 - Products (Page 88) ASHRAE Journal - March 2009 - Products (Page 89) ASHRAE Journal - March 2009 - Special Products (Page 90) ASHRAE Journal - March 2009 - Special Products (Page 91) ASHRAE Journal - March 2009 - People (Page 92) ASHRAE Journal - March 2009 - Classified Advertising (Page 93) ASHRAE Journal - March 2009 - Classified Advertising (Page 94) ASHRAE Journal - March 2009 - Classified Advertising (Page 95) ASHRAE Journal - March 2009 - Advertising Index (Page 96) ASHRAE Journal - March 2009 - Advertising Index (Page Cover3) ASHRAE Journal - March 2009 - Advertising Index (Page Cover4)
For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.