FFU modular connection to use, the FFU is widely used in clean rooms, dust free console dust-free, dust-free production lines, assembly rooms and applications such as local Baiji. FFU with early, efficient two-level filter. Fans from the top of FFU air intake and early, efficient filter, filtered clean air throughout the surface to 0.45M/S ± 20% wind speed the wind speed is sent out. It for a different size, different levels of cleanliness in clean room, micro-environmental quality of clean air. In the new clean room, clean room renovation renovation, you can improve the cleanliness level and reduce noise and vibration, and can greatly reduce the cost, easy to install and maintain, is ideal for a clean environment components.