TERMIUM Plus®

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WVTR [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 1998-10-15

English

Subject field(s)
  • Chemistry
  • Thermal Insulation
  • Waterproofing (Construction)
DEF

A measure of the rate of transmission of water vapor through a material under controlled laboratory conditions of temperature and humidity.

OBS

Perm: a unit of water vapor transmission defined as 1 grain of water vapor per square foot per hour per inch of mercury pressure difference (1 inch of mercury = 0.491 psi).

French

Domaine(s)
  • Chimie
  • Isolation thermique
  • Étanchéité (Construction)
DEF

Écoulement de la vapeur d'eau perpendiculairement à deux surfaces parallèles d'un matériau, à travers une surface unitaire dans des conditions prescrites. S'exprime en g/m².s.Pa.

Spanish

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