Calculation of infiltration heat loss of plastic-steel windows

Taking a typical residence layout as an example, calculates the ratio of infiltration heat loss to total heat load of typical residence in several cities by the calculation method regulated in the code. Experiments on the air infiltration by tracer gas method and obtains the range of air infiltration rate per unit length of the crack. According to the comparison between calculation and experiment results, considers that the calculation method is practical and can be referred to during project design.