In industrial electronic systems, cooling is an essential part. In induction furnaces, this task is done by water. The most important part of power transmission to the melt is the coil, which is located inside the melting pot. This cylindrical sensitive piece is made of copper profiles through which water passes. Due to the high electrical losses in the coil, its precise design is of great importance, because the overall efficiency of an induction furnace is highly dependent on it, and most of the electrical losses occur in this part. In addition, the lack of accuracy in design details can cause risks for furnace personnel. Using the right profile, designing the dimensions and number of rounds, the right frequency, etc. are necessary in the design of the coil.