AstroFan FFU-EC is suitable for the clean room using a large number of FFUs. It has a convenient and comprehensive cluster control system, and uses a computer software to realize the intelligent control of the running state and fault of each FFU. In terms of maintenance cost, EC-FFU is more energy-saving than AC-FFU and saves considerable energy annually for the clean room using a large number of FFUs. Meanwhile, EC-FFU has the characteristic of low noise.