U-value

noun
U-val·​ue | \ˈyü-ˌval-(ˌ)yü \

Definition of U-value 

: a measure of the heat transmission through a building part (such as a wall or window) or a given thickness of a material (such as insulation) with lower numbers indicating better insulating properties — compare r-value

First Known Use of U-value

1949, in the meaning defined above

History and Etymology for U-value

unit

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Dictionary Entries near U-value

uva grass

uvala

U-valley

U-value

uvanite

uvarovite

UVB

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The first known use of U-value was in 1949

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