Fan Filter Unit (FFU)

  • Filtering Range: It can effectively filter 0.3㎛~1㎛ tiny particles.
  • Filtering Efficiency: The filtering efficiency reaches 95-99.99%, improving the indoor air quality.
  • Long lifespan: Replacement frequency of 12 months, saving maintenance costs. (Replacement time will be adjusted according to environmental requirements)
  • Applications: Commercial, Industrial, Semiconductor, Biotechnology, Pharmaceuticals, Dust-Free Filters.

Fan Filter Units (FFUs)

Fan Filter Unit (Fan Filter Unit) is an air circulation and filtration equipment that combines a fan and a high-efficiency filter (HEPA/ULPA). This fan unit reduces energy loss considering its low pressure drop and adjusts the airflow by controlling the rotational speed of the motor.

(3 phases variable speed turbofan) is beneficial for clean room laminar flow and easily achieves clean room cleanliness in a modular system environment.


Filter Frame: Galvanized Steel, Aluminum & Stainless Steel
Housing: Galvanized Steel, Stainless Steel, Aluminum
Filter Media: Glass Fiber
H13 (EN1822)/MERV17-18 (ASHRAE 52.2)
MPPS : ≥ 99.95% DOP : ≥99.99%@0.3 pm
H14 (EN1822)/MERV19 (ASHRAE 52.2)
MPPS : ≥ 99.995% DOP : ≥99.999%@0.3 um
Flame Retardant Grade: UL 900
Separator: Hot melt adhesive
Max. Temperature:≦80℃
Power Supply: AC 1 or 3 phase 220-230V (50-60Hz)


✔ Low pressure drop design
✔ Energy saving
✔ Longer service life
✔ Easy to install
✔ Lower noise


Designed for being applied for pharmaceutical companies, semiconductors, optics, wafer electronics, biotechnology, and hospital operating rooms, etc.

Benefits of FFUs (Fan Filter Units)
  1. High-efficiency Filtration: FFUs are usually equipped with high-efficiency HEPA or ULPA filters, which can effectively capture and remove tiny particles in the air, such as dust, bacteria and viruses, to ensure high efficiency in air purification.
  2. Self-driven System: Each FFU contains a built-in fan that allows it to operate independently without the need to connect to a central air conditioning system. This design enhances the system’s flexibility and ease of installation.
  3. Energy-saving: Modern FFU design emphasizes on energy efficiency and usually adopts energy-saving motors and fans to reduce energy consumption and operating costs.
  4. Low Noise: The FFU is designed with noise control in mind, making it run at a lower noise level, suitable for the areas where require a quiet environment, such as laboratories, hospitals and high-precision manufacturing facilities.
  5. Wide Range of Applications: FFUs are widely used in places that require clean room environments, such as semiconductor manufacturing, biotechnology, pharmaceutical production, food processing and other industries, where they are critical to maintaining air purification standards in specific areas.
    FFU filter units have become important equipment for modern clean rooms and other places requiring high air purification standards due to their high efficiency filtration capacity, independent operation system, energy-saving design, low noise characteristics and wide range of applications.




HEPA (High Efficiency Particulate Air Filter) is an air filtration efficiency level that can remove 99.97% or more of particles over 0.3 microns in diameter. HEPA filters are made of thousands of extremely fine fibers that can trap both small and larger particles.
They are very effective in removing particles from the air. HEPA filters are made of chemical fibers and glass fibers, which are randomly arranged to form layers of fine, irregular filters that cut off airborne particles of different sizes.
HEPA filters are classified as H10, H11, H12, H13, H14, and U15. Since different filters have different particle sizes, it is natural that they need to be replaced at different times.
When purchasing a filter, the filter specification will indicate the “Initial Pressure Loss”, which is the wind resistance of the new filter itself. As more particles are added to the filter, the air resistance will increase. Therefore, it is usually recommended to replace the filter when the air resistance reaches 2 to 3 times of the initial pressure loss of the filter.
Take our high efficiency HEPA as an example, at a specific airflow (different sizes will be tested at different airflows) the pressure loss is 250 pa right out of the factory, and when the pressure loss comes to 500 pa, it means it’s time to replace it. (9.8 pa = 1 mm water gauge)

FFU Filter Unit Information
Model No.Housing Size
WxHxD (mm)
Housing Size
WxH (ft.)
Filter Size
WxHxD (mm)
Filter Rating
Air Flow
Initial Resistance
In W.G.    Pa
Rec. Final P.D.
Power Supply
FFU-66-1577x577x2402’x2′570x570x50H13/H142333960.3587≤ 250
(1.0 In W.G.)
55~59220~230V 50~60Hz

◎ Face Velocity: 0.38 m/s
◎ Other sizes are available upon request.