8. FFU (Fan Filter Unit)
The fan filter unit (FFU) is a equipment of clean room that combines air circulation and air filtration by a blower and a high-efficiency filter (HEPA/ULPA). It is mainly used to filter harmful dust particles in the air of the clean room, and continuously and staby supply clean air. Cooperate with the overall air chande frequency planning to ensure that the clean room level meets international standards.