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Article: Natural ventilation for reducing airborne infection in hospitals

TitleNatural ventilation for reducing airborne infection in hospitals
Authors
KeywordsInfection control
Isolation room
Natural ventilation
Ventilation rate
Issue Date2010
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/buildenv
Citation
Building And Environment, 2010, v. 45 n. 3, p. 559-565 How to Cite?
AbstractHigh ventilation rate is shown to be effective for reducing cross-infection risk of airborne diseases in hospitals and isolation rooms. Natural ventilation can deliver much higher ventilation rate than mechanical ventilation in an energy-efficient manner. This paper reports a field measurement of naturally ventilated hospital wards in Hong Kong and presents a possibility of using natural ventilation for infection control in hospital wards. Our measurements showed that natural ventilation could achieve high ventilation rates especially when both the windows and the doors were open in a ward. The highest ventilation rate recorded in our study was 69.0 ACH. The airflow pattern and the airflow direction were found to be unstable in some measurements with large openings. Mechanical fans were installed in a ward window to create a negative pressure difference. Measurements showed that the negative pressure difference was negligible with large openings but the overall airflow was controlled in the expected direction. When all the openings were closed and the exhaust fans were turned on, a reasonable negative pressure was created although the air temperature was uncontrolled. The high ventilation rate provided by natural ventilation can reduce cross-infection of airborne diseases, and thus it is recommended for consideration of use in appropriate hospital wards for infection control. Our results also demonstrated a possibility of converting an existing ward using natural ventilation to a temporary isolation room through installing mechanical exhaust fans. © 2009 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/59031
ISSN
2014 Impact Factor: 3.341
2014 SCImago Journal Rankings: 1.871
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, ChinaHKU 7115/04E
Health, Welfare and Food Bureau, Hong Kong SAR GovernmentHA-NS-002
Funding Information:

The work described in this paper was supported jointly by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. HKU 7115/04E) and a Hospital Authority-commissioned project under the Research Fund for the Control of Infectious Diseases (RFCID) by the Health, Welfare and Food Bureau (Project No. HA-NS-002), Hong Kong SAR Government.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorQian, Hen_HK
dc.contributor.authorLi, Yen_HK
dc.contributor.authorSeto, WHen_HK
dc.contributor.authorChing, Pen_HK
dc.contributor.authorChing, WHen_HK
dc.contributor.authorSun, HQen_HK
dc.date.accessioned2010-05-31T03:41:43Z-
dc.date.available2010-05-31T03:41:43Z-
dc.date.issued2010en_HK
dc.identifier.citationBuilding And Environment, 2010, v. 45 n. 3, p. 559-565en_HK
dc.identifier.issn0360-1323en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59031-
dc.description.abstractHigh ventilation rate is shown to be effective for reducing cross-infection risk of airborne diseases in hospitals and isolation rooms. Natural ventilation can deliver much higher ventilation rate than mechanical ventilation in an energy-efficient manner. This paper reports a field measurement of naturally ventilated hospital wards in Hong Kong and presents a possibility of using natural ventilation for infection control in hospital wards. Our measurements showed that natural ventilation could achieve high ventilation rates especially when both the windows and the doors were open in a ward. The highest ventilation rate recorded in our study was 69.0 ACH. The airflow pattern and the airflow direction were found to be unstable in some measurements with large openings. Mechanical fans were installed in a ward window to create a negative pressure difference. Measurements showed that the negative pressure difference was negligible with large openings but the overall airflow was controlled in the expected direction. When all the openings were closed and the exhaust fans were turned on, a reasonable negative pressure was created although the air temperature was uncontrolled. The high ventilation rate provided by natural ventilation can reduce cross-infection of airborne diseases, and thus it is recommended for consideration of use in appropriate hospital wards for infection control. Our results also demonstrated a possibility of converting an existing ward using natural ventilation to a temporary isolation room through installing mechanical exhaust fans. © 2009 Elsevier Ltd.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/buildenven_HK
dc.relation.ispartofBuilding and Environmenten_HK
dc.subjectInfection controlen_HK
dc.subjectIsolation roomen_HK
dc.subjectNatural ventilationen_HK
dc.subjectVentilation rateen_HK
dc.titleNatural ventilation for reducing airborne infection in hospitalsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0360-1323&volume=45&issue=3&spage=559&epage=565&date=2010&atitle=Natural+ventilation+for+reducing+airborne+infection+in+hospitalsen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.buildenv.2009.07.011en_HK
dc.identifier.scopuseid_2-s2.0-70350583069en_HK
dc.identifier.hkuros161294en_HK
dc.identifier.hkuros192415en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70350583069&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume45en_HK
dc.identifier.issue3en_HK
dc.identifier.spage559en_HK
dc.identifier.epage565en_HK
dc.identifier.isiWOS:000272307700005-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectDispersion and ventilation control of exhalation pollutants in hospital wards-
dc.relation.projectUnderstanding droplets due to the use of nebulizers and respiratory activities-
dc.identifier.scopusauthoridQian, H=36091859600en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK
dc.identifier.scopusauthoridSeto, WH=35293452400en_HK
dc.identifier.scopusauthoridChing, P=7005847968en_HK
dc.identifier.scopusauthoridChing, WH=7101701289en_HK
dc.identifier.scopusauthoridSun, HQ=7404828427en_HK
dc.identifier.citeulike5352348-

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