ASHRAE Journal - February 2012 - 83

For gaseous contaminants, efforts to remove these substances have been less than stellar. Solutions have been available using adsorption, absorption or chemisorption. In most cases, these types of ﬁlters only have been applied if the application was considered toxic, carcinogenic, corrosive or odorous to a level considered unacceptable to the building occupants, or the non-human contents of the building were judged to be especially important (e.g., in museums and some speciﬁc manufacturing facilities). Activated carbon air ﬁlters provide the most reasonable solution to reducing ozone exposure in commercial HVAC applications. At the same time, carbon air ﬁlters will reduce other molecular contaminants such as volatile organic compounds (VOCs), bio-efﬂuents and organic-based odors that may be considered objectionable to building occupants. The reaction between ozone and carbon is catalytic in that the ozone is not adsorbed on the surface of the carbon as are other gases, but rather the reaction will form carbon dioxide and oxygen (C + 2 O3 ó CO2 + 2 O2). Ozone does not have a signiﬁcant effect on the life of the carbon ﬁlter in the system, but the carbon will be affected by other gas contaminants that it will adsorb at the same time. When installed in a system with little or no challenge for the carbon surface area by other gases, the air ﬁlter’s afﬁnity for removing ozone is almost indeﬁnite.

For practical purposes the air ﬁlter should be replaced when its efﬁciency on ozone removal falls below 50%. This determination may be made by removing a ﬁlter from the system and subjecting it to an ozone removal efﬁciency test at an air ﬁlter testing laboratory. Once a baseline of ozone removal efﬁciency degradation is established a repetitive or preventive maintenance (PM) schedule may be formulated for ﬁlter replacement.

Manufacturers’ Direction
One of the detriments facing HVAC engineers is the lack of product literature speciﬁc to the use of carbon for ozone removal. Manufacturers have been slow to provide this information, as the primary use of gaseous contaminant removal ﬁltration has centered on hazardous or gas-speciﬁc applications. Although the beneﬁts of carbon air ﬁltration have been unquestionable, the application of such has been considered costly, references to servicing or replacing the ﬁlters have been difﬁcult to ﬁnd, and there has been anxiety in applying carbon that is based upon a perceived lack of information to apply the products properly. In contrast, particulate ﬁlter information is readily available, there are deﬁned ﬁlter evaluation methods to address contaminant removal (ASHRAE Standard 52.2-2007, Method of Testing

www.info.hotims.com/37995-43

February 2012

ASHRAE Journal

83

ASHRAE Journal - February 2012

Table of Contents for the Digital Edition of ASHRAE Journal - February 2012

ASHRAE Journal - February 2012
Contents
Commentary
Industry News
Letters
Meetings and Shows
Feature Articles
Building Integrated Aquaculture
Integrating Solar and Hydronic Heating in Residential and Small Commercial Systems
Advantages of Integrated Control in Solar Combisystems
Using Building Mass to Heat and Cool: Thermo Active Building Systems (TABS)
Design Considerations for Commercial Kitchen Ventilation
Special Section
InfoCenter
Standing Columns
Standards and Codes
Emerging Technologies
Products
IAQ Applications
Special Products
Classified Advertising
Advertisers Index
ASHRAE Journal - February 2012 - ASHRAE Journal - February 2012
ASHRAE Journal - February 2012 - Cover2
ASHRAE Journal - February 2012 - 1
ASHRAE Journal - February 2012 - 2
ASHRAE Journal - February 2012 - Contents
ASHRAE Journal - February 2012 - Commentary
ASHRAE Journal - February 2012 - 5
ASHRAE Journal - February 2012 - Industry News
ASHRAE Journal - February 2012 - 7
ASHRAE Journal - February 2012 - 8
ASHRAE Journal - February 2012 - 9
ASHRAE Journal - February 2012 - Letters
ASHRAE Journal - February 2012 - 11
ASHRAE Journal - February 2012 - 12
ASHRAE Journal - February 2012 - 13
ASHRAE Journal - February 2012 - Meetings and Shows
ASHRAE Journal - February 2012 - 15
ASHRAE Journal - February 2012 - Building Integrated Aquaculture
ASHRAE Journal - February 2012 - 17
ASHRAE Journal - February 2012 - 18
ASHRAE Journal - February 2012 - 19
ASHRAE Journal - February 2012 - 20
ASHRAE Journal - February 2012 - 21
ASHRAE Journal - February 2012 - 22
ASHRAE Journal - February 2012 - 23
ASHRAE Journal - February 2012 - 24
ASHRAE Journal - February 2012 - 25
ASHRAE Journal - February 2012 - Integrating Solar and Hydronic Heating in Residential and Small Commercial Systems
ASHRAE Journal - February 2012 - 27
ASHRAE Journal - February 2012 - 28
ASHRAE Journal - February 2012 - 29
ASHRAE Journal - February 2012 - 30
ASHRAE Journal - February 2012 - 31
ASHRAE Journal - February 2012 - 32
ASHRAE Journal - February 2012 - 33
ASHRAE Journal - February 2012 - Advantages of Integrated Control in Solar Combisystems
ASHRAE Journal - February 2012 - 35
ASHRAE Journal - February 2012 - 36
ASHRAE Journal - February 2012 - 37
ASHRAE Journal - February 2012 - 38
ASHRAE Journal - February 2012 - 39
ASHRAE Journal - February 2012 - 40
ASHRAE Journal - February 2012 - 41
ASHRAE Journal - February 2012 - 42
ASHRAE Journal - February 2012 - 43
ASHRAE Journal - February 2012 - Using Building Mass to Heat and Cool: Thermo Active Building Systems (TABS)
ASHRAE Journal - February 2012 - 45
ASHRAE Journal - February 2012 - 46
ASHRAE Journal - February 2012 - 47
ASHRAE Journal - February 2012 - 48
ASHRAE Journal - February 2012 - 49
ASHRAE Journal - February 2012 - 50
ASHRAE Journal - February 2012 - 51
ASHRAE Journal - February 2012 - 52
ASHRAE Journal - February 2012 - 53
ASHRAE Journal - February 2012 - Design Considerations for Commercial Kitchen Ventilation
ASHRAE Journal - February 2012 - 55
ASHRAE Journal - February 2012 - 56
ASHRAE Journal - February 2012 - 57
ASHRAE Journal - February 2012 - 58
ASHRAE Journal - February 2012 - 59
ASHRAE Journal - February 2012 - 60
ASHRAE Journal - February 2012 - 61
ASHRAE Journal - February 2012 - 62
ASHRAE Journal - February 2012 - 63
ASHRAE Journal - February 2012 - InfoCenter
ASHRAE Journal - February 2012 - 65
ASHRAE Journal - February 2012 - 66
ASHRAE Journal - February 2012 - 67
ASHRAE Journal - February 2012 - 68
ASHRAE Journal - February 2012 - 69
ASHRAE Journal - February 2012 - 70
ASHRAE Journal - February 2012 - 71
ASHRAE Journal - February 2012 - Standards and Codes
ASHRAE Journal - February 2012 - 73
ASHRAE Journal - February 2012 - 74
ASHRAE Journal - February 2012 - 75
ASHRAE Journal - February 2012 - 76
ASHRAE Journal - February 2012 - 77
ASHRAE Journal - February 2012 - Emerging Technologies
ASHRAE Journal - February 2012 - 79
ASHRAE Journal - February 2012 - 80
ASHRAE Journal - February 2012 - Products
ASHRAE Journal - February 2012 - IAQ Applications
ASHRAE Journal - February 2012 - 83
ASHRAE Journal - February 2012 - 84
ASHRAE Journal - February 2012 - Special Products
ASHRAE Journal - February 2012 - Classified Advertising
ASHRAE Journal - February 2012 - 87
ASHRAE Journal - February 2012 - Advertisers Index
ASHRAE Journal - February 2012 - Cover3
ASHRAE Journal - February 2012 - Cover4
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_MCDEBX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WNYSQY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XATVOD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FJSHSS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_CCBZDS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XDEFVG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2023november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2023november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VHGNBL
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WPKBNJ
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_UUVCDE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RTGDEW
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2023
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LKRFXS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_AZSOFG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ERCDBH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QWDFRV
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JHGVDF
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OPUYHG
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SREIBM
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LRTGLK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OKRFGH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2022november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2022november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TZSERA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_LVRUIX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RPTVYZ
https://www.nxtbook.com/nxtbooks/ashrae/mini_pub_catalog
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XIYTGD
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2022
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RFGDOB
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PABXNU
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_REMKLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PICVBT
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_AOYTVW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JQOPLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_IOYTBC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SGAJJF
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_IGHYER
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_PDRKLS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2021november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2021november_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_XCODFR
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QSLFGO
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ILKVNM
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2021
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OPDJKD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VJKSRY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDHUTC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JPPKRR
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDLTTH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_CKLLES
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SLDOX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_HJETUK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OLUHGE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ZERDGH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QVMNEO
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RTPOKE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_BBATRE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_STUBMW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TPEMPE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JNMKDS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FBTTPA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WQMMNE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TVBRYN
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2020
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_KTUZMA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ABEDGD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201910
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201909
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019septmeber_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019september
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201908
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201907
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201906
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201905
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201904
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019april
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201903
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019march
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201902
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201901
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2019
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018december
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018october
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2018
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201810
https://www.nxtbook.com/nxtbooks/ashrae/ashraeinsights_201806
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201805
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201804
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201803
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201712
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201711
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201710
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201709
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201705
https://www.nxtbook.com/nxtbooks/ashrae/ashrae_meetinginsert_201610
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acrexindia
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer
https://www.nxtbook.com/nxtbooks/amca/2014summer2
https://www.nxtbook.com/nxtbooks/amca/2014summer
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acma_2014summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201311
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201309
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acmasupp_2013fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201305
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201303
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2013winter
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201211
https://www.nxtbook.com/nxtbooks/ashrae/achr_expo_mexico2012
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201209
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v3
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201205
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201203
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012winter
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201111_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201109_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2011summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201105
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201103
https://www.nxtbookmedia.com