Hot-air dryer is utilized for drying as well as preheating non-hygroscopic plastics. It is provided to patrons at an attractive rate. Its main task is to eradicate moisture from the air. It does this by cooling it with a refrigerant. Thus, the water vapor is condensed, and the air can be compressed. The output of the machine is dry compressed air. Hot-air dryer can perform its task without making any damage. The machine work well with the help of its innovative features such as control unit, heater blower unit, drying hopper and others.