The performance of windows to water intrusion is a function of air pressure difference on the inside and outside surfaces of the window. The pressure difference for which a window is tested for water intrusion is a function of its performance grade (permissible design wind load). What is the relationship between the performance grade of a window and the pressure difference for which it is tested for water intrusion?

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The Answer of The performance of windows to water intrusion is a function of air pressure difference on the inside and outside surfaces of the window. The pressure difference for which a window is tested for water intrusion is a function of its performance grade (permissible design wind load). What is the relationship between the performance grade of a window and the pressure difference for which it is tested for water intrusion?

The Performance of Windows to Water Intrusion Is a Function