• Fan Filter Unit (FFU) Solutions for Cleanrooms

    Flair provides a complete range of fan filter units and ceiling filtration solutions for cleanroom projects, including standard FFU, stainless steel FFU, ducted ceiling HEPA modules and room-side replaceable FFU systems.
    Custom airflow, HEPA/ULPA filtration, housing materials, controls and ceiling interfaces are available for pharmaceutical, semiconductor, electronics and other controlled environments.

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  • Standard Fan Filter Unit
  • Dual-Fan Square FFU
  • Stainless Steel Fan Filter Unit
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Fan Filter Unit (FFU) for Cleanroom Air Filtration

A Fan Filter Unit (FFU) is a self-contained clean air module that combines a fan, HEPA or ULPA filter and airflow control in a compact ceiling-mounted unit. It draws air through the filter and supplies clean, uniform airflow directly into the controlled area.

FFUs are widely used in modular cleanrooms, pharmaceutical facilities, semiconductor and electronics manufacturing, laboratories and other contamination-controlled environments.

Flair provides multiple FFU configurations to meet different ceiling layouts, material requirements, maintenance methods and HVAC strategies.

  • HEPA / ULPA Filtration
  • EC Fan Options
  • Individual or Group Control
  • Custom Ceiling Integration
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Explore Our FFU and Ceiling Filtration Solutions

Select the FFU configuration based on cleanroom design, housing material, airflow strategy and filter maintenance requirements.

standard fan filter unit

Standard Fan Filter Unit

Economical fan-powered HEPA filtration for modular cleanroom ceilings.
Best for: Electronics, laboratories and general cleanrooms.
Stainless Steel Fan Filter Unit

Stainless Steel Fan Filter Unit

SUS304/316L construction for hygienic and corrosion-resistant cleanroom applications.
Best for: Pharmaceutical, biotechnology and food processing.
Ducted ceiling Filter module

Ducted Ceiling HEPA Module

Ceiling filtration module connected to centralized HVAC or ducted air supply.
Best for: Projects requiring central airflow control.
Room-Side Replaceable FFU (RSR FFU)

RSR FFU

HEPA filter can be replaced from inside the cleanroom without accessing the ceiling plenum.
Best for: Pharmaceutical facilities and restricted ceiling spaces.

Which FFU Type Is Right for Your Cleanroom?

Compare the main differences in construction, airflow supply and maintenance access to identify the suitable solution for your project.

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
HEPA / ULPA Available Available Available Available
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
Custom Size Yes Yes Yes Yes

Why Cleanroom Contractors and EPCs Choose Flair FFU

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

  • Flexible Ceiling Integration

    Custom dimensions and mounting interfaces for different ceiling grids and cleanroom structures.

  • Energy-Efficient Fan Options

    EC fan systems help reduce power consumption while supporting stable airflow control.

  • HEPA / ULPA Filtration Options

    H14 HEPA and ULPA configurations are available according to cleanliness and process requirements.

  • Centralized Control Capability

    Individual FFUs or large FFU groups can be monitored and controlled through centralized systems.

  • Custom Housing & Materials

    Painted steel, SUS304 and SUS316L configurations for different cleanroom applications.

  • Factory Testing & Project Support

    Airflow, noise, electrical and functional testing can be completed before shipment.

Engineering Features Across Our FFU Range

AC-centrifugal-fan

EC / AC Fan Options

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

Intelligent Control

3-step Individual speed control, group control and optional remote monitoring.

H14 HEPA / ULPA Filters

Filter grades and efficiency selected according to cleanroom classification.

Stainless Steel handle and cable

Electrical & Wiring Options

Customized voltage, wiring interfaces and control communication.

Airflow Velocity and Uniformity Test

Factory Airflow & Noise Testing

Performance verification before delivery.

certification of cleanroom equipment

Quality & Documentation

Factory inspection and available project documentation according to order requirements.

FFU Centralized Control Systems

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Central Controller / HMI
↓
Network / PLC
↓
Zone A FFUs
Zone B FFUs
Zone C FFUs

用你网站蓝色线条。

不要放太多小设备，避免像电气原理图。

目标是让 EPC 30秒内看懂：

一台控制器可以管理几十甚至很多台 FFU。

For large cleanroom projects, multiple FFUs can be networked into a centralized control system for coordinated airflow control, operating status monitoring and alarm management.

  • Individual & Group Speed Control with touch screen or PC
    Control individual FFUs or zones according to operating requirements.
  • Operating Status Monitoring
    Monitor fan operation, speed and system status.
  • Alarm Management
    Support fault and abnormal-condition alarms.
  • Energy Management
    Adjust fan operation by area or operating mode to reduce unnecessary energy use.PLC / BMS Communication
  • PLC / BMS Communication
    Optional communication with cleanroom control or building management systems.

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

Flair provides project-specific FFU engineering for cleanroom contractors, designers and system integrators. Each unit can be configured according to airflow requirements, ceiling layout, filter efficiency, housing material, electrical standards and control strategy.

  • Dimensions & Ceiling Grid
    Custom width, depth and mounting interfaces.
  • Airflow & External Static Pressure
    Fan selection according to required airflow and system resistance.
  • HEPA / ULPA Filter Grade
    H14 HEPA or ULPA options according to project requirements.
  • Housing Material
    Painted steel, SUS304 or SUS316L.
  • Voltage & Electrical Standard
    110V / 220V / 230V / project-specific electrical requirements.
  • Control & Communication
    Local control, group control, PLC/BMS interface and monitoring options.
Discuss Your FFU Project
FFU 3D drawing

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.

Pharmaceutical & Biotechnology

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

Food & Medical Device

Hygiene-sensitive manufacturing and controlled packaging areas.

Semiconductor & Electronics

Particle-sensitive wafer, electronics and precision assembly environments.

Battery & Advanced Manufacturing

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

Laboratories & Healthcare

Research laboratories, testing facilities and controlled healthcare environments.

soft wall clean booth

Modular & Softwall 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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