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Humidity

/Humidity
Humidity2018-01-10T00:23:17+00:00

Humidity is water vapour present in an air mass. There are four generally accepted expressions of humidity used in the water damage restoration industry;

  1. Humidity Ratio (HR)
  2. Relative Humidity (RH)
  3. Water Vapour Pressure (WVP)
  4. Specific Humidity (SH)

The most common expression is ‘relative humidity’; relative humidity is the amount of moisture contained in a sample of air as compared tp the maximum amount the sample of contain at that temperature. This definition is accurate in concept; but strictly speaking, relative humidity is the ratio of the partial pressure of water in a sample of air to the water vapour pressure at saturation of that air at a given temperature and atmospheric pressure.

Please see below, Pressure vs Temperature Diagram;

 

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