When the wood dryer is running in the main hall, the fuel inside the machine will burn outside to produce heat energy. These energies will be fully absorbed through the transfer medium, and then the medium will evenly spread the absorbed temperature throughout the large material box of the dryer, forming a high temperature of about 180 degrees. Then, the air in the entire furnace box is circulated by the thermal circulation fan inside the equipment. The high temperature combined with air circulation can achieve a drying effect that everyone can imagine.