Cleanroom FFU (Fan Filter Unit) Air Cleaning Equipment

Cleanroom FFU (Fan Filter Unit) Introduction‌

An FFU (Fan Filter Unit) is a modular air purification device that integrates a fan and a filter, designed to supply clean air to cleanrooms and serve as a critical component in maintaining high-cleanliness environments.

‌Core Function and Working Principle‌

The FFU draws in air through its built-in fan, filters it through a high-efficiency filter (such as HEPA or ULPA), and then delivers the purified air at a uniform velocity (typically 0.45 m/s ±20%) to create a vertical unidirectional airflow, effectively removing airborne particles. Its modular design allows for flexible installation, replacement, and expansion, minimizing disruption to production operations.

‌Key Features‌

• ‌Space-saving‌: No need for large air ducts, reducing installation space requirements.
• ‌Flexible layout‌: Can be adjusted in conjunction with cleanroom wall panels; the number of FFUs can be increased or decreased to change cleanliness levels.
• ‌Negative pressure sealing‌: The plenum is designed with negative pressure to prevent leakage and contamination of the cleanroom.
• ‌Energy-efficient‌: Low duct resistance and recirculation of return air reduce energy consumption.

‌Typical Applications‌

FFUs are widely used in industries such as electronics, pharmaceuticals, and food, particularly in areas requiring local cleanliness levels of Class 100 or higher (e.g., production lines, clean booths). In electronic cleanroom facilities, they are often part of an HVAC system that includes a makeup air unit (MAU) and a dry cooling coil (DC) to control humidity, temperature, and cleanliness separately.

‌Example Technical Specifications‌