Fan filter units are stand-alone units with integrated HEPA-filter, fan and control system. The FFU filters the top air through a HEPA filter, and the filtered clean air is uniformly sent out over the entire air outlet at the velocity of 0.45 m/s ± 20%. - FFU shell and HEPA filter adopt split design, easy to install and replace. - Microprocessor control system, energy-saving and low noise. - Long service-life blower, up to 100,000 hours, maintenance-free and small vibration. - Suitable for using separately or connecting together for assembly line.