##  [Air Leakage](/air-leakage) 

  ##  [Air Leakage](https://engineering.quantumdictionary.io/air-leakage-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

Uncontrolled movement of indoor or outdoor air through gaps, cracks, joints, and penetrations in the building envelope or between conditioned and unconditioned zones, driven by pressure and temperature differentials, resulting in unintended heat transfer, moisture transport, and contaminant exchange.