U-value

noun

U-val·​ue ˈyü-ˌval-(ˌ)yü 

: 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

Examples of U-value in a Sentence

Recent Examples on the Web

Made of several layers of materials and fabric, they are designed to provide thermal resistance (known as R-value) and prevent thermal transmittance conductivity (known as U-value). —Heidi Wachter, Treehugger, 14 July 2023

Word History

Etymology

unit

First Known Use

1949, in the meaning defined above

Rhymes for U-value

• value
• eigenvalue
• undervalue