The test standard ASTM E783 – Standard Test Method for Field Measurement of Air Leakage Through Installed Exterior Windows and Doors is used to evaluate air leakage rates of various building envelope products installed in the field.  This test method is intended to represent the effects of wind loads on exterior building surface components with respect to air leakage.



Summary of Test Method

Test specimens are installed in the exterior building wall and are typically selected by the project architect or owner’s representative.   A test chamber is constructed on the interior or exterior of the specimen with an air supply system that will provide the specified test pressure difference.  The ASTM E783 test pressures are applied typically in the  positive (inward) direction while air infiltration data is recorded. Calibrated test measuring equipment is used to measure test pressures and air flow data.   A record of visual observations are made to evaluate the system and any failures of the specimen.   



Significance and Use

The ASTM E783 Test Standard is an industry standard that is used to evaluate building envelope  products with respect to pressures induced by wind load on a building structure.  In many cases,  this test is required by many project specifications and various building codes.   Project designers typically use the test data and results to develop specific project calculations and details for construction of the system being used.