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Relative Humidity and Health

Bacteria, viruses, fungi, mites, asthma and range of relative humidity

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Relative humidity (RH) should be within certain limits for controlling health aspect:

  • Bacteria, 30 - 60% RH
  • Viruses, 50 - 70% RH
  • Fungi, less than 70% RH
  • Mites, less than 70% RH
  • Respiratory infections, above 40% RH
  • Asthma, close to 50% RH
  • Chemical interactions, less than 40% RH
  • Ozone production, above 75% RH

In general relative humidity for human comfort ranges 30 - 60% RH.

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Related Topics

  • Physiology - Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more

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