FFU Fan Filter Unit (Fan Filter Unit) is a Fan Filter Unit. FFU fan filter unit can be used for modular connection, widely used in electronic, pharmaceutical, food, biological engineering, medical, laboratory and other applications. FFU has initial and efficient two-stage filter. The air is inhaled from the top of the FFU and filtered through the initial and high efficiency filter. The clean air after filtration is delivered at a constant speed of 0.45m/S/S plus or minus 20% in the whole air.