Field test method of air leakage through installed exterior windows in residential buildings

The commonly-used test method is questioned through the comparison of two sets of data yielded respectively in the field tests of air leakage through the same installed exterior window by different testers. Combining with the features of exterior windows generally used in residential buildings and the condition of current measuring apparatus, puts forward the overall uncertainty of 20% as a control object, and specifies the limited values of outdoor wind velocity and additional air leakage and the uncertainty control objectives of different measured parameters.