What is air infiltration in window performance?
Air infiltration is the measured rate of air leakage through a window assembly under standardized test conditions.
Plain-English explanation
For homeowners, air infiltration relates to drafts and unwanted outside air movement. For engineers and specifiers, it is a controlled test value tied to product performance standards.
Test context
The source document references ASTM E283 testing at a test pressure of 1.57 psf for air leakage resistance.
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