What is FFU?

FFU, the full name of Fan Filter Unit in English, and Fan Filter Unit in Chinese, is a modular terminal air supply device with its own power that combines a fan and a high-efficiency (or ultra-high-efficiency) air filter.

Different from traditional centralized clean air conditioning systems, FFU adopts a decentralized layout - each FFU operates independently and can flexibly adjust the air volume and start and stop according to the needs of different areas of the clean room. This 'break it into parts' design concept enables FFU to show obvious advantages in terms of energy saving, flexibility, reliability and other aspects.

So, what are the advantages of FFU? This article will analyze one by one from multiple dimensions.

1. Significant energy-saving advantages

Energy saving is one of the most prominent advantages of FFU over traditional centralized air conditioning systems.

The power of a single unit is low, and the operating cost is greatly reduced. The power of a single FFU is usually 80-150W-. Compared with the 'continuous operation of all areas' mode of centralized air conditioners, FFU can independently control start, stop and air volume according to the actual cleanliness requirements of each area to avoid unnecessary waste of energy.

EC motors further amplify the energy-saving effect. The FFU equipped with EC (electronically commutated DC brushless) motor has more obvious energy-saving advantages. The efficiency of EC motors can reach more than 90%, and they can save 30%-50% of energy compared with traditional AC motors. Actual measurement data shows that the average power of EC DC FFU is about 60W, while that of traditional AC FFU is about 160W, and the energy consumption is reduced to about 45% of the latter.

The energy-saving benefits of large-scale deployment are particularly impressive. Taking the semiconductor industry as an example, TSMC has improved the operating efficiency from 55% to more than 60% by optimizing the FFU fan structure, saving an average of 1.56 million kilowatt hours of electricity and reducing 805 tons of carbon dioxide emissions in a single factory. In a Class 10,000 clean workshop, the use of EC motor FFU can save more than 200,000 yuan in electricity bills every year.

2. Flexible deployment and modular design

FFU's modular design is another of its core strengths.

Free combination and configuration as needed. FFU adopts standard module sizes and can be freely combined and zoned controlled according to the actual needs of the clean room. Clean rooms in different areas and different cleanliness levels can be configured with different specifications and quantities of FFU-.

Adaptable and can be adjusted at any time. The independent structural features of FFU allow it to adjust the layout at any time, making up for the lack of mobility in the clean room and solving the problem of changes in cleanliness requirements caused by production process adjustments.

Ideal for renovations and renovations. In the renovation and renovation of new clean rooms or clean factories, FFU can not only improve the cleanliness level, reduce noise and vibration, but also significantly reduce the cost.

Flexible to adapt to various ceiling structures. FFU can be used with any ceiling frame system to easily meet the requirements of cleanliness level 100, 10 or even 1.

3. Low noise and low vibration

Clean rooms have strict requirements on noise and vibration - noise affects the working environment of operators, and vibration may interfere with the normal operation of precision equipment.

Low operating noise. FFU operating noise is typically between 45 and 55 decibels -. Using EC motor and FFU with optimized air duct design, the noise can be further reduced. Compared with traditional products, the noise can be reduced by 6-7dB(A)-.

Low vibration, protecting precision equipment. FFU uses an external rotor centrifugal fan, which has the characteristics of low vibration and long life. For applications such as semiconductor lithography machines and measurement equipment that are extremely sensitive to micro-vibrations, low vibration characteristics are particularly important.

4. Easy installation and maintenance

Modular structure, easy to install. FFU adopts modular structure design, which is easy to install, replace and move. There is no need for complex air duct systems, which can significantly shorten on-site construction time -

Filter replacement is easy. Some FFUs adopt a separate design of the box and filter, making it more convenient to replace the filter. The bottom-mounted filter FFU can be replaced directly from the clean room side without entering the ceiling space, which reduces the difficulty of maintenance and the impact on production.

Low maintenance costs. FFU uses long-life, maintenance-free high-quality fans, which have a long working time and do not require frequent maintenance.

5. Efficient filtration performance

FFU is usually equipped with a two-stage filtration system - primary efficiency and high efficiency (or ultra-high efficiency). After the air intercepts large particles through the primary filter, it is then finely filtered by a HEPA high-efficiency filter (retention rate for 0.3 μm particles ≥ 99.97%) or an ULPA ultra-high-efficiency filter (retention rate for 0.12 μm particles ≥ 99.9995%) to ensure that the sent air is highly clean.

Compared with traditional centralized air supply systems, FFU can generate positive pressure, thereby reducing the risk of bypass leaks in the clean room ceiling.

6. Intelligent control capabilities

Modern FFU supports a variety of control methods, from simple manual speed adjustment to complex computer group control systems.

A variety of control methods are available. FFU supports a variety of control methods such as stepless speed regulation and multi-speed speed regulation, and can flexibly adjust the wind speed according to actual needs.

Centralized control at scale. Through the computer group control system, a large number of FFUs can be connected to a unified platform for centralized management, and operating parameters can be dynamically adjusted according to cleanliness requirements to achieve predictive maintenance and real-time monitoring.

FFU advantages at a glance

Summarize

The fundamental reason why FFU has become the mainstream air supply equipment in modern clean rooms is that it solves many pain points of traditional centralized air conditioning systems: high energy consumption, poor flexibility, long construction period, and complex maintenance.

For companies that need to build new clean rooms, the FFU solution can significantly reduce the initial investment and construction difficulty; for factories that need to be renovated and upgraded, FFU can be deployed flexibly without affecting normal production; for companies that pursue long-term operational benefits, the energy-saving advantages of EC motor FFU can recover the price difference of the initial investment within a few years.

Choosing the right FFU product requires comprehensive consideration of many factors such as cleanliness level, installation space, budget and long-term operating costs.

Aili Industry—Full industry chain FFU manufacturer

Aili Industrial has been deeply involved in the field of clean room equipment for nearly two decades. From fan winding, box processing to control system development, the entire industry chain independently manufactures FFU fan filter units. The products cover a full range of standard, ultra-thin, energy-saving (EC motor), group control, and stainless steel types, supporting full-dimensional customization in size, material, motor, control method, filtration level, etc., and adapting to the different cleaning needs of 13 major industries including semiconductors, panel displays, pharmaceuticals, food, and data centers.

If you need FFU selection suggestions or customized solutions, please contact the professional technical team of Aili Industry.