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What size is a fan filter unit?

  • Author:Jason Peng

  • Cleanroom Engineering Technology Manager of Deiiang Company.

    Product R&D Manager of GDC Inc. Cleanroom Equipment Manufacturing Company.

    Executive Director of Guangdong Cleanroom Industry Association of China.

    Engaged in R&D of related products for 15 years, with rich relevant technical experience

  • 2025-02-10  |  Visits:

In the world of cleanroom technology, fan filter units (FFUs) play a crucial role in maintaining air quality and cleanliness. Understanding the available sizes of FFUs is essential for professionals tasked with designing and managing controlled environments. This article aims to provide valuable insights into the various dimensions, customization options, and specifications of FFUs to support effective Cleanroom operations.


What Size is a Fan Filter Unit?

Fan filter units come in various standard and custom sizes to meet specific CleanRoom requirements. Generally, they are designed to fit seamlessly into different layouts and airflow capacities.

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Product NameAC FFU
Product ModelDC-FFU-A01DC-FFU-A02DC-FFU-A03DC-FFU-A04
Dimension(mm)575x575x220575x1175x220875x1175x2751175x1175x295
Filter Dimension(mm)570x570x69570x1170x69870x1170x691170x1170x69
Air volume500m³/h1000m³/h1500m³/h2000m³/h
Noise52~62dB(A)52~62dB(A)52~62dB(A)52~62dB(A)
Air Pressure200PA200PA260PA290PA
Power170W170W200W240W
Weight28Kg35Kg47Kg55Kg
MaterialGalvanized/powder coated/SUS 304 plate
Supply PowerAC 1N 110, 220V/50,60Hz
Control System3 stage regulation, group reguation
Filter Efficiency99.95%MPPS above H13-U16@EN1822
Pre FilterG3/G4 Filter, nylon filter
Work Statuspower Indicator, work indicator, Error indicator
Connection Type3 Pin Aviation Male Female socket, terminat blocks
Overload ProtectionOverload protect of motor and controller
Monitor Contact Communication Methodport of reserve and Erro


Product NameEC FFU
Product ModelDC-FFU-E01DC-FFU-E02DC-FFU-E03DC-FFU-E04
Dimension(mm)575x575x225575x1175x275875x1175x3051175x1175x305
Filter Dimension(mm)570x570x69570x1170x69870x1170x691170x1170x69
Air Volume500m³/h1000m³/h1500m³/h2000m³/h
Noise48~54dB(A)48~54dB(A)52~58dB(A)52~58dB(A)
Air Pressure210PA210PA280PA280PA
Power60W90W140W160W
Weight28Kg35Kg47Kg55Kg
MaterialGalvanized/powder coated/SUS 304 plate
Supply PowerAC 1N 110, 220V/50,60Hz
Control SystemManual stepless regulation; PC group regulation
Filter Efficiency99.95%MPPS above H13-U16@EN1822
Pre FilterG3/G4 Filter, nylon filter
Work StatusWork indication; Error indication
Connection TypeTerminal Bolcks
Overload ProtectionOverload protect of motor and controller
Monitor Contact Communication MethodR485 TCP

FFU Customized Size

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Custom sizing for fan filter units is essential in achieving optimal Cleanroom performance. Depending on the specific application, FFUs can be tailored to unique dimensions, airflow rates, and filtration requirements.

  • Tailored Solutions

    Customized FFUs allow for tailored solutions that fit various cleanroom layouts and operational needs.

  • Flexibility in Design

    The flexibility in design ensures that even non-standard spaces can effectively maintain cleanliness and airflow.

  • Enhanced Performance

    Custom sizes enable better performance, as the FFUs can be designed to meet specific challenges, such as restricted space or unique equipment configurations. This adaptability enhances operational efficiency, reduces contamination risks, and ensures compliance with industry standards.


FFU's Airflow Capacity

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The airflow capacity of a fan filter unit is critical for ensuring adequate filtration and CleanRoom standards. Common ratings range from 200 CFM to over 1,000 CFM.

Selecting the proper airflow capacity is essential to maintain the required cleanliness levels in various applications, from pharmaceuticals to Electronics manufacturing. Higher airflow rates help reduce particle concentration and improve overall air quality. Furthermore, FFUs can be integrated into larger systems to enhance air circulation and filtration efficiency, ensuring that the cleanroom meets stringent industry regulations and standards.


Size of HEPA/ULPA Filters in FFU

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HEPA and ULPA filters installed in FFUs are typically standardized for ease of replacement and maintenance. Common sizes for HEPA filters include 24x24 inches and 12x24 inches. These dimensions facilitate compatibility with most FFUs and ensure optimal filtration efficiency. The choice of HEPA or ULPA filters depends on the cleanliness level required for the specific cleanroom environment. HEPA filters capture particles down to 0.3 microns with an efficiency of 99.97%, while ULPA filters are designed to capture even smaller particles with efficiencies exceeding 99.999%. This makes them suitable for the most stringent applications, such as in pharmaceutical or Semiconductor industries. Selecting the appropriate filter size is critical for achieving effective airflow and filtration performance in FFUs.


FFU Shell Material

The shell material of fan filter units is vital for durability and functionality. It influences factors like weight, corrosion resistance, and ease of maintenance.

Explosion-proof FFU .jpg

Common Materials

FFUs are commonly constructed from stainless steel, aluminum, or galvanized steel, each offering unique benefits.

Durability Considerations

Stainless steel provides high durability and resistance to corrosion, making it ideal for sterile environments.

Maintenance and Cleaning

The choice of shell material also impacts maintenance practices. Smooth surfaces are easier to clean and maintain, reducing the risk of contamination in cleanrooms. Furthermore, compliance with international standards, such as ISO 14644 for cleanrooms, is essential for ensuring the reliability and efficiency of FFUs in various applications.

Cost-Effectiveness

While materials like aluminum may be more cost-effective, careful consideration of the operational environment is crucial for long-term performance and reliability.


How to Maintain and Upkeep FFU?

Proper maintenance and upkeep of fan filter units (FFUs) are crucial for ensuring optimal performance and extending their lifespan.

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1. Regular Inspections

Conduct regular inspections of the FFUs to check for any signs of wear, damage, or contamination. This includes examining filters, fan motors, and housing for any irregularities.

2. Filter Replacement

Filters should be replaced according to the manufacturer's guidelines or when pressure differentials indicate clogging. Regular filter changes help maintain air quality and ensure the effectiveness of the unit.

3. Cleaning Protocols

Develop a cleaning schedule that includes wiping down the exterior surfaces of the FFUs to remove dust and contaminants. Use appropriate cleaning agents that do not leave residues that could affect the cleanroom environment. Additionally, ensure that the fan and motor components are free from dust buildup, as this can impair airflow and efficiency.

4. Professional Servicing

Consider scheduling professional servicing at regular intervals to perform comprehensive checks and maintenance. This can include testing airflow rates, checking the integrity of seals, and ensuring that all components function optimally. Regular professional maintenance enhances reliability and helps prevent costly downtime.

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De Chuang Kunling Company Case Introduction:

At De Chuang Kunling Company, we pride ourselves on providing high-quality FFUs and comprehensive maintenance solutions. Our expertise in cleanroom technology ensures that our clients receive unparalleled support, helping them maintain optimal cleanroom conditions efficiently. With our commitment to quality and service, we enhance your operational efficiency while upholding the highest standards in cleanroom management.

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