The impacts of balanced and exhaust mechanical ventilation on indoor radon

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Models for estimating radon entry rates, indoor radon concentrations, and ventilation rates in houses with a basement or a vented crawl-space and ventilated by natural infiltration, mechanical exhaust ventilation, or balanced mechanical ventilation are described. Simulations are performed for a range of soil and housing characteristics using hourly weather data for the heating season in Spokane, WA. For a house with a basement, we show that any ventilation technique should be acceptable when the soil permeability is less than approximately 10/sup -12/m/sup 2/. However, exhaust ventilation leads to substantially higher indoor radon concentrations than infiltration or balanced ventilation with the ... continued below

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Pages: 13

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Fisk, W.J. & Mowris, R.J. February 1, 1987.

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Description

Models for estimating radon entry rates, indoor radon concentrations, and ventilation rates in houses with a basement or a vented crawl-space and ventilated by natural infiltration, mechanical exhaust ventilation, or balanced mechanical ventilation are described. Simulations are performed for a range of soil and housing characteristics using hourly weather data for the heating season in Spokane, WA. For a house with a basement, we show that any ventilation technique should be acceptable when the soil permeability is less than approximately 10/sup -12/m/sup 2/. However, exhaust ventilation leads to substantially higher indoor radon concentrations than infiltration or balanced ventilation with the same average air exchange rate when the soil permeability is 10/sup -10/m/sup 2/ or greater. For houses with a crawl-space, indoor radon concentrations are lowest with balanced ventilation, intermediate with exhaust ventilation, and highest with infiltration.

Physical Description

Pages: 13

Notes

NTIS, PC A02/MF A01; 1.

Source

  • INDOOR AIR '87: 4th international conference on indoor air quality and climate, Berlin, F.R. Germany, 17 Aug 1987

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  • Other: DE87009164
  • Report No.: LBL-23136
  • Report No.: CONF-870853-4
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 6412760
  • Archival Resource Key: ark:/67531/metadc1212905

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1, 1987

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 29, 2018, 11:01 p.m.

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Fisk, W.J. & Mowris, R.J. The impacts of balanced and exhaust mechanical ventilation on indoor radon, article, February 1, 1987; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1212905/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.