The use of double glass has spread largely to achieve thermal isolation and reduce the consumption of energy in refrigerating in summer or heating in winter. The manufacture of double glass has entered in Syria, and become very important necessity for achieving gain in consumption of energy, and specially in the drying process of its before joining tow glasses together and making double panes. The researcher has prepared mathematical model for heating exchanger which is used in drying of panes by using Matlab program, and by this pattern the researcher has studied the effect of different factors on design of the heating exchanger for finding the optimal design which ensure reducing in using the energy in the drying process.