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Aug 15, 2025

Are FFU and HEPA BOX suitable for a Class 100 cleanroom?

Hey there! As a supplier of FFU (Fan Filter Unit) and HEPA BOX, I often get asked whether these products are suitable for a Class 100 cleanroom. In this blog, I'll share my insights on this topic.

First off, let's understand what a Class 100 cleanroom is. A Class 100 cleanroom is defined by the Federal Standard 209E (although it's been replaced by ISO 14644 - 1, but the concept remains similar). In a Class 100 cleanroom, the number of particles equal to or larger than 0.5 micrometers cannot exceed 100 particles per cubic foot of air. That's a pretty high - standard environment, usually required in industries like semiconductor manufacturing, pharmaceutical production, and some high - end research facilities.

FFU in a Class 100 Cleanroom

FFUs are a popular choice for cleanroom applications. They consist of a fan and a filter in a single unit. The fan draws in air and forces it through the filter, removing contaminants in the process.

One of the biggest advantages of using FFUs in a Class 100 cleanroom is their flexibility. You can install multiple FFUs in a modular way, which allows you to customize the airflow and filtration capacity according to the size and specific requirements of your cleanroom. For example, if you have a large cleanroom, you can simply add more FFUs to ensure sufficient air circulation and filtration.

Another great thing about FFUs is their energy efficiency. Modern FFUs are designed with energy - saving motors and advanced control systems. This means you can maintain the required air quality in your Class 100 cleanroom without breaking the bank on electricity bills.

FFUs also offer easy maintenance. Since each unit is self - contained, if one FFU malfunctions, you can simply replace or repair it without shutting down the entire cleanroom. This reduces downtime and keeps your production or research activities running smoothly.

However, there are also some considerations when using FFUs in a Class 100 cleanroom. The noise level can be an issue, especially if you have a large number of FFUs running. But don't worry, many manufacturers, including us, offer low - noise FFUs to solve this problem. Also, the initial cost of installing FFUs can be relatively high, but considering the long - term benefits in terms of energy savings and easy maintenance, it's definitely a worthy investment.

HEPA BOX in a Class 100 Cleanroom

HEPA BOXes, on the other hand, are essentially pre - fabricated filter units. They are usually equipped with high - efficiency particulate air (HEPA) filters, which are capable of removing 99.97% of particles 0.3 micrometers or larger.

HEPA BOXes are very reliable when it comes to maintaining the air quality in a Class 100 cleanroom. Their design ensures a consistent and uniform airflow distribution, which is crucial for achieving the strict particle count requirements of a Class 100 environment.

They are also relatively easy to install. You can mount HEPA BOXes on the ceiling or walls of your cleanroom, depending on your layout and airflow needs. This makes them a great option for retrofitting existing cleanrooms or for building new ones from scratch.

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One of the key benefits of HEPA BOXes is their long service life. The high - quality filters used in HEPA BOXes can last for a long time, reducing the frequency of filter replacements. This not only saves you money on filter costs but also minimizes the disruption to your cleanroom operations.

But just like FFUs, HEPA BOXes have their limitations. They may not be as flexible as FFUs in terms of adjusting the airflow. Once installed, it can be more difficult to change the airflow pattern or increase the filtration capacity without significant modifications.

Our Products

We offer a wide range of FFU and HEPA BOX products that are specifically designed for Class 100 cleanrooms. For example, our Gel Seal Terminal HEPA / ULPA Module provides excellent sealing performance, ensuring that there is no leakage of contaminated air. It uses advanced gel - seal technology to prevent particles from bypassing the filter.

Our Gel Seal Silent Hood HEPA Box is a great choice if you're concerned about noise. It's designed to operate quietly while still providing high - efficiency filtration. The gel - seal design also enhances the overall performance and reliability of the unit.

And for those who need easy filter replacement, our Roomside Replaceable HEPA Box is the perfect solution. You can replace the filter from the room side, which is much more convenient and reduces the risk of contamination during the replacement process.

Conclusion

So, are FFU and HEPA BOX suitable for a Class 100 cleanroom? The answer is a resounding yes! Both FFUs and HEPA BOXes have their own unique advantages and can play important roles in maintaining the strict air quality standards of a Class 100 cleanroom.

If you're in the market for FFU or HEPA BOX products for your Class 100 cleanroom, don't hesitate to get in touch with us. We have a team of experts who can help you choose the right products based on your specific needs. Whether you're building a new cleanroom or upgrading an existing one, we're here to support you every step of the way.

References

  • Federal Standard 209E
  • ISO 14644 - 1

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Claire Li
Claire Li
Clean air is more than just a product—it’s a commitment. As the marketing director at Suzhou National Purification, I’m dedicated to raising awareness about the importance of high-quality filtration systems. Follow me as we discuss industry trends and best practices.