OpenLegislation

Division 3.3.2.3 Relative humidity

United Kingdom

Original text. Later amendments are not shown.

If humidity is measured as a relative humidity RH %, the amount of water of an ideal gas x H2O [mol/mol] is calculated by means of equation (7-80):

x H2O = RH % 100 × RH % 100 × P H2O P abs (7-80)

Where:

RH %

  • relative humidity [%]

    • p H2O

  • water vapour pressure at 100 % relative humidity at the location of relative humidity measurement, T sat=T amb [kPa]

    • p abs

  • wet static absolute pressure at the location of relative humidity measurement [kPa]