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Fan Filter Unit

Fan Filter Unit – Class 100 Cleanliness, Modular Design

The fan filter unit (FFU) is a self-powered terminal air purification device that integrates a fan and a HEPA/ULPA within a single housing. Installed in the ceiling system of a cleanroom, it delivers high-purity air to local areas through its dedicated fan-driven airflow. It is suitable for both laminar and turbulent flow cleanrooms, and can be flexibly installed in a variety of ceiling structures to achieve cleanliness levels from Class 1000 to Class 1. FFUs are widely used in cleanrooms, clean benches, clean production lines, and localized high-purity zones, making them an ideal choice for enhancing cleanliness, reducing noise, and lowering costs in both new construction and renovated clean environments.

Fan Filter Unit PDF
A stainless steel fan filter unit
Features
  • Uses high-quality HV-brand ultra-fine glass fiber filter paper for stable filtration performance and extended service life.
  • Equipped with either high-performance domestic motors or imported EBM direct-drive motors for reliable, energy-efficient operation.
  • Captures ≥ 0.3 μm particles with up to 99.99% efficiency, meeting Class 100 cleanroom standards.
  • 3-speed adjustable airflow, allows flexible settings based on operational needs, ensuring optimal FFU performance.
  • CE-certified, complies with international safety and performance standards.
Structure
  1. Handle and box body: The handle and the box body are made of stainless steel or galvanized aluminum alloy steel plates, featuring a sturdy structure and strong corrosion resistance.
  2. Air inlet protection net: The FFU air inlet can be equipped with a coarse efficiency air filter.
  3. Speed switch: Three-speed airflow adjustment are provided to meet the airflow requirements of various clean zones.
  4. HEPA/ULPA filter: Engineered to capture fine particles, ensuring the supply of clean air and compliance with cleanroom class standards.
  5. EBM motor: Equipped with high-performance AC or EC motors, with options for imported EBM or domestic brands, ensuring stable operation and high energy efficiency.
  6. Control panel: It is used for start-stop control, wind speed regulation and operation status monitoring.
6 essential components of a fan filter unit
Operating Principle

The operating principle can be divided into three main steps: air intake, air filtration, and air discharge.

  • First, the built-in fan generates airflow and draws indoor air through the air inlet.
  • Next, the air passes through the HEPA/ULPA filter, removing dust, bacteria, and other particulates.
  • Finally, the filtered clean air is uniformly supplied into the room through the entire air outlet surface at a velocity of 0.45±20% m/s, thereby completing the air purification process.

During this process, the FFU operates continuously to circulate and purify indoor air, delivering high-quality clean air to cleanrooms and microenvironments of various sizes and cleanliness levels.

Fan filter unit working principle flowchart
Specification
Table 1: Fan Filter Unit Specification
Item JFFU140S JFFU160S JFFU180S JFFU280S
JFFU140AZ JFFU160AZ JFFU180AZ JFFU280AZ
Air Velocity (m/s) 0.35 – 0.5
Filter Mesh Filtration efficiency for particles ≥ 0.3 μm reaches ≥ 99.99%
HEPA/ULPA Filter Efficiency (%) ≥ 99.99% @ ≥ 0.3 μm U15 or higher grade filters available
Noise (db @ 0.45 m/s) ≤ 50
Power Supply (V) 220 V ± 10%, 50±2 Hz
Maximum Input Power (kW) 140 160 180 280
External Dimensions (mm) 1175 × 575 × 300 1175 × 575 × 300 1175 × 875 × 330 1175 × 1175 × 300
1175 × 575 × 250 1175 × 575 × 250 1175 × 875 × 280 1175 × 1175 × 250
Primary Air Filter Specifications (mm) 454 × 404 × 25
HEPA/ULPA Filter Specifications (mm) 1170 × 570 × 69 1170 × 570 × 69 1170 × 870 × 69 1170 × 1170 × 69
External Static Pressure (Pa) 120
Weight (kg) 24 28 42 52
Note: Non-standard sizes can be customized. S represents stainless steel material; AZ represents aluminized zinc steel plate.
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