• Fan Filter Unit (FFU) Solutions for Cleanrooms

    Customized FFU solutions including standard FFU, stainless steel FFU, ducted ceiling modules, and room-side replaceable (RSR) FFU for pharmaceutical, semiconductor, electronics, and other controlled environments.

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  • Fan Filter Unit 3D drawing
  • Dual-Fan Square FFU
  • Stainless Steel Fan Filter Uni
  • Standard Fan Filter Unit
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What Is a Fan Filter Unit (FFU)?

A Fan Filter Unit (FFU) is a modular air filtration device integrating a fan, HEPA/ULPA filter, and control system. It supplies clean filtered air for cleanrooms and controlled environments requiring precise airflow management.

Flair provides customized FFU solutions with different configurations, materials, and control options to meet various project requirements.

  • H13/H14/U15-U17 filtration available
  • EC / AC fan options
  • Individual or Group Control
  • Customized size, housing, control and integration
  • Suitable for pharma, electronics, labs, food, battery
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Explore Our FFU Product Range

Choose from four FFU and ceiling filtration configurations for different cleanroom layouts, maintenance methods, and process requirements.

standard fan filter unit

Standard Fan Filter Unit（FFU）

● Standard ceiling-mounted FFU for modular cleanrooms and clean zones
● Best for general cleanroom air supply and flexible layouts
● Cost-effective, easy to integrate, widely used
Stainless Steel Fan Filter Unit

Stainless Steel FFU

● FFU with stainless steel housing for stricter hygiene requirements
● Best for pharmaceutical, food, and wet-cleaning environments
● Better corrosion resistance and easier cleaning
Ducted ceiling Filter module

Ducted Ceiling HEPA Module

● Centralized ceiling filtration module connected with ducted air supply
● Best for projects requiring integrated ceiling airflow systems
● Suitable for large cleanroom ceiling layouts and engineered airflow distribution
Room-Side Replaceable FFU (RSR FFU)

RSR FFU

● Room side replaceable filter unit for maintenance from the clean side
● Best for walkable ceiling or limited plenum maintenance conditions
● Faster filter replacement and lower maintenance disruption

Which FFU Type Is Right for Your Cleanroom?

Use this quick comparison to identify the most suitable FFU configuration for your cleanroom layout, maintenance strategy, and process needs.

Selection Factor

Standard FFU

Stainless Steel FFU

Ducted Ceiling HEPA Module

RSR FFU
Fan System Integrated Integrated Central HVAC / project dependent Integrated
Housing Material Painted steel / optional SS SUS304 / SUS316L SS / painted steel SS / painted steel
Air Supply Self-powered Self-powered Ducted Self-powered
Filter Replacement Standard access Project dependent Room-side / project dependent Room-side
Central Control Optional Optional HVAC/BMS integration Optional
Typical Application General cleanroom GMP / hygienic area Central HVAC system Restricted ceiling access

Why Cleanroom Contractors Choose Flair FFU Solutions

Flair supports cleanroom contractors, designers and EPC companies with flexible FFU configurations, project-specific engineering and reliable factory-tested equipment.

  • Project-Based Engineering Support

    Support FFU selection, layout coordination, and cleanroom integration according to project requirements.

  • Customized Design Capability

    Customize FFU dimensions, materials, airflow requirements, and control systems.

  • Multiple FFU Configurations

    Provide standard, stainless steel, ducted ceiling, and RSR FFU options for different applications.

  • Cleanroom Integration Experience

    Support EPC contractors with ceiling coordination and installation requirements.

  • Energy-Efficient Operation

    EC fan options for reduced power consumption.

  • Manufacturing Quality

    Factory testing and documentation support.

Key Engineering Features Across Our FFU Solutions

Our FFU range is designed for flexible cleanroom integration, with configurable fans, filters, controls, housing materials, and testing options.

AC centrifugal fan or EC EBM motor, according to IEEE specification and requirements, low noise

EC Fan Technology

Efficient fan systems selected according to airflow, pressure and control requirements.

Airflow & Leak Testing

Ceiling integration design

Designed for stable airflow performance in cleanroom environments.

FFU High-Efficiency Filtration Module

HEPA/ULPA Filtration

Compatible with different cleanroom ceiling structures.

Efficient fan systems selected according to airflow, pressure and control requirements.

Intelligent Control System

Central monitoring and individual FFU control options.

Airflow & Leak Testing

Airflow Verification & Leak Testing

Performance verification before delivery.

ffu certification

Certification / Documentation

Factory testing and quality documentation available according to order requirements.

Intelligent FFU Monitoring and Centralized Control

  • DC/EC FFU Motor Control System Diagram
  • AC Fan FFU Control System Diagram
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Centralized monitoring and group control are available for projects requiring coordinated airflow management across multiple FFUs. The system can support fan speed adjustment, status monitoring, alarm display, and zone-based management.

  • Individual / group control
  • Air speed adjustment
  • Running status monitoring
  • Fault / alarm indication
  • Suitable for multi-FFU cleanroom projects

Control architecture can be customized according to FFU quantity, cleanroom zoning and project communication requirements.

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Custom FFU Engineering for Cleanroom Projects

Beyond standard products, Flair provides project-specific FFU solutions including layout planning, ceiling integration, customized dimensions, airflow requirements, and control system coordination.

  • Customized FFU dimensions
  • Ceiling layout coordination
  • Airflow and pressure requirements
  • Control system integration
  • Project documentation support
Discuss Your FFU Project
  • Custom FFU Engineering for Cleanroom Projects
  • FFU on ceiing- Custom FFU Engineering for Cleanroom Projects
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FFU Applications in Cleanroom and Controlled Environments

FFUs provide flexible localized clean-air supply for cleanrooms and controlled production environments across a wide range of industries.

Our FFUs deliver HEPA/ULPA filtration for cleanrooms, pharmaceutical labs, medical facilities, and electronics manufacturing. Ideal for ISO-class clean zones, GMP-compliant production, and modular clean booths, they provide consistent airflow, low noise operation, and effective particulate control for sensitive processes,and meet ISO and GMP standards.

Grid FFU for GMP cleanrooms Pharmaceutical & Biotechnology

Pharmaceutical & Biotechnology

GMP cleanrooms, sterile manufacturing and contamination-controlled processing areas.

Ceiling grid FFU for Semiconductor & Electronics

Semiconductor & Electronics

Particle-sensitive wafer, electronics and precision assembly environments.

FFU-based modular cleanrooms for Food & Medical Device

Food & Medical Device

Hygiene-sensitive manufacturing and controlled packaging areas.

T-Grid mounting FFU for Battery & Advanced Manufacturing

Battery & Advanced Manufacturing

Controlled production areas for battery, energy and advanced material manufacturing.

FFU Engineering for Laboratories & Healthcare cleanroom

Laboratories & Healthcare

Research laboratories, testing facilities and controlled healthcare environments.

soft wall clean booth Expandable Clean Areas

Modular / Upgrade Cleanrooms

FFU-based modular cleanrooms, clean booths and localized clean zones.

FAQs

Start Your Cleanroom Project with Confidence，Talk to our experts and get the right FFU solution for your application soon.

Step 1 Preparation

  • Tools: double ladder, scaffold
  • Workers: at least 6 persons, two persons on the ceiling, two stands on the scaffold, the other two transfer FFU
  • Tips: all workers should pay attention to  their safety, especially the persons on the ceiling

Step 2 Install FFU

  • The Workers ①&② take the FFU from the carton, and deliver it to workers ③&④
  • Then workers ①&② fetch HEPA filters
  • The workers ③&④ convey FFU casing to workers ⑤&⑥ on the ceiling sideways

Step 3  Assembly FFU

  • Workers ⑤&⑥ lift the FFU casing simultaneously
  • Workers ①&② convey the HEPA filter to workers ③&④, and repeat until all FFU finish installation；
  • Workers ③&④ pave the HEPA filter on the T-grid ceiling on the level

Step4 Assembly FFU casing

  • Workers ⑤&⑥ place FFU casing on the HEPA filter；
  • Workers ③&④ move the supports platform to install another FFU, repeat steps 1-4

Step1  Take down the old HEPA filter

  • Workers ⑤&⑥ on the ceiling stand on FFU casing, Lift the FFUcasing
  • Workers ③&④ take down the old HEPA filter and deliver it to workers ①&② on the ground
  • Workers ①&② carry the old HEPA filters to pointed place and take the new HEPA filters back

Step 2 Replace HEPA Filter

  • Workers ③&④ catch the new HEPA filter from Workers ①&②, and place it to the T-Grid on level
  • The workers⑤&⑥ place the FFU casing on the new HEPA filter

Step 3 Inspect

  • Workers ⑤&⑥ check and inspect FFU

1.FFU Construction

FFU often consists of a pre-filter, a HEPA/ ULPA filter and the motorized fan, It pulls air through the filters for distribution to cleanrooms or enclosed work stations such as hoods,Which can be installed in the grid  ceiling grid.

FFUs are typically installed in two main configurations, the first is that the FFU draws air from a common plenum. One major advantage of a common plenum FFU system converts the ceiling plenum into a negative pressure space, thereby eliminating the risk of contaminants migrating from the ceiling plenum into the clean space below. Another is The negative pressure is created as the FFU draws surrounding air from the common returns as well as fresh outside air from an AHU.

2.FFU working process in cleanroom

The FFU can be directly ducted from an AHU or terminal device.

They are widely used in pharmaceuticals, biotechnology, medical facilities, electronics, semiconductor manufacturing, food, and cosmetics production, supporting sterile processes, contamination control, and regulatory compliance. Modular and energy-efficient, FFUs allow flexible cleanroom layouts and targeted airflow, protecting sensitive products and equipment.

Yes. Many units include speed controllers or digital interfaces that allow users to adjust airflow based on cleanroom requirements.

  • If the project is cost-sensitive and simple, AC is sufficient.
    For long-term operation or energy-saving targets, EC is the better option.

Yes. High-quality FFUs are engineered to minimize noise, usually operating at 50–60 dB depending on airflow speed and design.

The number depends on:

  • Required ISO class level

  • Room size

  • Air changes per hour (ACH)

  • Ceiling coverage ratio

  • Cleanroom designers typically calculate these parameters during planning.

Yes,Of course .you can consult our technician freely .

Need Help Selecting the Right FFU

Share your cleanroom layout, cleanliness level, ceiling configuration and airflow requirements. Our team can recommend the appropriate FFU solution for your project.

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