The Basic fan unit provides efficient protection in environments with hazardous particles in the form of solid and liquid aerosols such as dust, smoke, fumes and fibers. Equipped with Li-Ion battery, electronic control of contstant airflow and advanced system for warning the wearer in the case of low airflow. Individualy adjustable airflow from 170 lpm up to 240 lpm can be easily controlled by just one button. All the relevant information clearly visible due to newly designed LED control panel.