Particle Concentrations in an Air-Conditioned Office Building With Normal and High Efficiency Filtration

Details

• Personal Author:
  Faulkner D ; Fisk WJ ; Mendell MJ ; Sullivan D
• Description:
  Indoor and outdoor particle concentrations and ventilation rates were measured versus time in a large office building without tobacco smoking. Periodically, high efficiency filters replaced the normal filters in air handling systems. For all particle sizes, indoor concentrations varied considerably with time. Even with the normal air filters, which have a low efficiency for submicron particles, number concentrations of submicron particles were a factor of three to six smaller indoors compared to outdoors. The high efficiency filters reduced the indoor-outdoor particle concentration ratio for submicron particles by 70% to 95%. For larger particles, the decreases in indoor concentrations were substantially smaller. Comparisons of model predictions with measured data indicate a large rate of removal of submicron indoor particles by some process other than ventilation or air filtration, and also provide evidence of significant indoor generation or resuspension of particles larger than 1 micrometer. [Description provided by NIOSH]
• Subjects:
  Air Conditioning Air Pollutants, Occupational Dust Environmental Monitoring Epidemiology Morbidity Mortality Occupational Health Particulate Matter Safety
• Keywords:
  Air-conditioning Air-conditioning-equipment Air-filters Air-monitoring Air-purification Air-quality-control Air-quality-measurement Air-quality-monitoring Airborne-dusts Airborne-fibers Airborne-particles Analytical-methods Analytical-processes Morbidity-rates Mortality-rates Office-equipment Office-workers Particulate-dust Particulates Respirable-dust Statistical-analysis

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• ISBN:
  1860812953
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  California ; Ohio ; OSHA Region 5 ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSHEFS - Division of Surveillance, Hazard Evaluations, and Field Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  19-24
• Volume:
  4
• NIOSHTIC Number:
  nn:20028173
• Citation:
  Proceedings of Indoor Air '99, The 8th International Conference on Indoor Air Quality and Climate, Volume 4, Edinburgh, Scotland, August 8-13, 1999. London: Construction Research Communications Ltd., 1999 Aug; :19-24
• Editor(s):
  Raw G; Aizlewood C; Warren P
• Federal Fiscal Year:
  1999
• Peer Reviewed:
  False
• Source Full Name:
  Proceedings of Indoor Air '99, The 8th International Conference on Indoor Air Quality and Climate, Volume 4, Garston, Scotland, August 8-13, 1999
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:24343c7c6300664d39ab5bf9ee0bfceebbbdaaa06a9e0b5d879038464f1e13c3eafe2b67072d5037211e722dd8ce2474368f583c5b1ee185274e1a19541680b3
• Download URL:
  https://stacks.cdc.gov/view/cdc/189798/cdc_189798_DS1.pdf
• File Type:
  [PDF - 584.14 KB ]