Abstract The problem of intensification of thermal processes and the process of heat exchange in a plate heat exchanger of the HHN02 type is considered. A comparison is made of two types of heat exchangers - shell-and-tube and plate. The formulas for calculating heat transfer and heat transfer coefficients are presented. The analysis of theoretical studies on the intensification of heat transfer in a plate heat exchanger with a corrugated surface of the plates is carried out. A full-scale experiment was carried out on a specially designed semi-industrial stand “Independent heating system of a residential building”. It has been found that the use of a corrugated surface is capable of providing a high value of the heat transfer coefficient. It has thus confirmed the advantages of the plate heat exchanger in comparison with the shell-and-tube.