##  [U-Value](/u-value) 

  ##  [U-Value](https://engineering.quantumdictionary.io/u-value-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The overall heat transfer coefficient of a building element, expressed as the steady-state heat flow per unit area per unit temperature difference between two defined environments (commonly W·m⁻²·K⁻¹).