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

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'U-value.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.