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SUNNYDA-Your Best FFU Unit Manufacturer
  • Reasonable prices for high-quality FFU unit
  • Professional manufacturer with 10+ years of experience
  • Professional enigneer and production team
  • single FFU unit
  • customized FFU unit
  • new alloy FFU unit
  • interior components FFU unit
  • single FFU unit
  • customized FFU unit
  • new alloy FFU unit
  • interior components FFU unit

FFU Unit Manufacturer

  • GMP Standard
  • Competitive Price
  • 304 Stainless steel/cold roller steel sheet
  • Adjustable air volume
  • Good after-sale Service and Cost Performance

Your Reliable Partner and Manufacturer of FFU Unit in China

The full name of FFU unit is Fan Filter Unit, also named HEPA fan filter unit, fan powered HEPA filter, etc. The Sunnyda FFU unitis a self-powered air supply filter device. This modular end air supply device has a filtering function to improve the air quality in a clean room. The fan filter unit works by sucking in the air from the top and filters it through the HEPA filter. The filtered clean air is then channeled into the cleanroom.

The filtered clean air is evenly distributed into the cleanroom at a speed of about 0.45m/s±20%. We can configure several FFU units with different air volumes according to your purification requirements in the cleanroom.

The Sunnyda FFU unit is widely used in clean rooms, dust-free operation tables, dust-free production lines, assembled dust-free rooms, and many other applications. It can still be customized to your needs such as simple clean workbenches, clean sheds, clean transfer cabinets, and clean storage closets. The Sunnyda FFU units have a very quiet to a point you will not notice the FFU running. This will help improve the working conditions of your cleanroom.

Sunnyda is your leading manufacturer of FFU units, Send your inquiry today!

Model FFU-001 FFU-002
Outside dimension(mm) 1175x575x300 1175x1175x300
Air volume(m3/h) 1000 2000
Body material New alloy/steel powder coating/stainless steel
Power supply 110-220V/50-60HZ
New weight(kg) 28 60

sunnyda FFU unit material inspection certificate

Sunnyda Support Your Business
hepa FFU Unit
Hepa FFU Unit
galvanized FFU unit
Galvanized FFU Unit
Adjustable FFU Unit
Adjustable FFU Unit
Ceiling mounted FFU unit
Ceiling Mounted FFU Unit
FFU unit for clean room
FFU Unit for Clean Room
Envirco FFU unit
Envirco FFU Unit
High air volume FFU unit
High Air Volume FFU Unit
Customized electric FFU unit
Customized Electric FFU Unit
Terminal FFU Units
Terminal FFU Units
Fan powered FFU unit
Fan Powered FFU Unit
Modular FFU unit
Modular FFU Unit
FFU unit used in cleanroom
FFU Unit Used in Cleanroom
Commerical FFU unit
Commerical FFU Unit
Industrial FFU unit
Industrial FFU Unit
galvanized industrial FFU unit
Galvanized Industrial FFU Unit

How to Control the Quality of Your FFU Unit

Detailed Section-view for FFU Unit

Detailed Section-view for FFU Unit

Fan for FFU Unit

Fan for FFU Unit
FFU Unit Handle

FFU Unit Handle

Supporting feet for FFU Unit

Supporting feet for FFU Unit
Outside cabinet for FFU unit

Outside Cabinet for FFU Unit

Controller for FFU Unit

Controller for FFU Unit
High-efficiency Filter for FFU Unit

High-efficiency Filter for FFU Unit

Galvanized FFU Unit in Production

Galvanized FFU Unit in production
Application for an FFU unit

Application for An FFU Unit

Good Quality Makes the Difference

Good Quality Makes the Difference

Sunnyda FFU unit

The Sunnyda FFU unit frame is made of zinc Aluminized sheet, which corrosion-resistant, lightweight, and strong. The cabinet is designed with golden ratio points, as such, the FFU unit is beautiful and elegant. The ultra-thin body thickness is only 23cm even with the high-efficiency filter. Its total thickness does not exceed 30cm.

The weight is only 24kg, which saves space and is convenient for construction, installation, and daily maintenance. The FFU fan filter unit has obvious energy-saving effects, ultra-low noise, uniform air pressure diffusion, uniform and stable wind speed on the air outlet, low power consumption, low operating cost, and long working life of more than 50,000 hours.

If you are in Europe, you can choose an electric fan filter with a frequency of 220~240V and 50HZ. If you are in North America, we can also set a voltage of 115V and a frequency of 60HZ for you. Our FFU unit adopts energy-saving and environmentally friendly motors that also save a lot of usage costs.

The HEPA filter in the Sunnyda FFU unit uses a well-known brand of fiber filter material. The material is stable, high-quality, long service life, and reduces post-maintenance. The HEPA filter plays a vital role in air purification.

Sunnyda FFU unit complies with ISO9001 and CE quality and safety standards. So, if you are looking for a high-quality fan filter unit manufacturer, Sunnyda will be your best choice. We will support your business to grow better. Get A quick quote now!

stainless steel FFU unit

Physical map display for our FFU unit


The Ultimate FAQ Guide to FFU Unit


1.What is an FFU Unit?
2.What are the Properties of an FFU Unit?
3.What is the Air Velocity in an FFU Unit?
4.Where Can a Fan Filter Unit Be Used?
5.What are the Components of an FFU Unit?
6.How Does a Fan Filter Unit Work?
7.Is the FFU Unit Silent?
8.Is the FFU Unit Environmentally-Friendly?
9.What is the Weight of the FFU Unit?
10.Is the FFU Unit Energy-Efficient?
11.Why Pick the Sunnyda FFU Unit?
12.Sunnyda FFU Unit is ISO9001. What Does That Mean?
13.What Are the Features to Consider When Picking an FFU Unit?
14.What is the Startup Check List for an FFU Unit?
15.What are the Cleaning and Maintenance Needs for an FFU Unit?
16.How Do You Transport and Store an FFU Unit?
17.Fan Clean System Vs. FFU Unit. Why is an FFU Unit Better?
18. What Makes an FFU Unit Great for the Electronic Industry?
19. How Do You Install an FFU Unit?
20.How Do You Correctly Install a High-Efficiency Filter in an FFU Unit?
21. How Can You Troubleshoot the Common FFU Unit Problems?


An FFU Unit is a critical component of a cleanroom that you must set up when building a cleanroom. This is something any cleanroom manufacturer would recommend that you get for your new cleanroom.

If you are not sure what it is all about, this FAQ guide will help you understand more about an FFU unit and how best to use it.


What is an FFU Unit?


FFU unit

A Sunnyda FFU Unit

An FFU unit or a Fan Filter Unit combines the use of a fan and a HEPA or ULPA filter. These two are essential for ensuring there is a proper supply of purified air in the cleanroom. As a result, an FFU unit is essential for improving the overall air quality in a cleanroom. This is achieved by sucking air into the unit and passing it through the filters.

The fan is essential for pushing the air across the filter for better purification and maintaining the correct air velocity in the cleanroom.


What are the Properties of an FFU Unit?


Modular Design

One thing that should make the FFU unit a great choice for most people should be the modular design. Such a design is critical for ensuring that the unit can be adapted to the different cleanrooms and applications. There are times you might need to set up several units to ensure they can supply your cleanroom better. This type of modularity means they can be set up to work together too.


Even Air Velocity

The air velocity is crucial for the functioning of any fan filter unit. The Sunnyda model will maintain a constant air velocity to ensure the air quality is great and still not overwhelming in terms of airspeed. You can always adjust this type of speed to ensure that your FFU unit works great as you want. The change in speed is easily achievable from the panel of the FFU unit.

FFU control panel

Detailed display for FFU controller

Ease of Setting up

The setup process is generally simple. If you have a technical team that has ever handled an FFU unit before, you should have an easy time setting up. Not to worry as Sunnyda can also provide installation services on demand. This will ensure that you always have a great working FFU unit in your cleanroom or any other space you were thinking of setting up.


Environmentally Friendly

The FFU unit from Sunnyda is designed with the environment in mind. One of the things that makes it environmentally friendly is the power use. It is energy-efficient meaning it would also be cheap to maintain. The filtration process will also make it a great unit for the environment. You will not have to use other filtration methods that might otherwise cause harm to the environment.


Impressive Lifespan

The model boasts of up to 50,000 hours in terms of lifespan. Those are many years of using the FFU unit without worrying about replacing it. For most people, they will end up saving more money compared to some models that might need replacement every few months.

Also, the maintenance is straightforward. You will not have to keep repairing the unit as it can work with little to no repair costs. So long as you follow the manufacturer maintenance schedule, you should end up with a unit that works great.


Easily Adaptable

The FFU unit is easily adaptable to different applications. It is why most people love it. They know that it can work for clean rooms, dust-free operation tables, dust-free rooms, and many others. Provided you need an area to have a constant flow of clean air, this is what you should consider getting right away.


What is the Air Velocity in an FFU Unit?


FFU unit

An Illustration of the FFU Unit Working Principle

The FFU unit has an air velocity of 0.45m/s±20%. This should be good enough air velocity that will help you handle the various projects better. Since the air velocity is adjustable, you can always have the unit working at the right velocity. This means you have to understand the cleanroom airspeed, depending on what you are handling. A bit of technical know-how might be necessary on your part to get it right.


Where Can a Fan Filter Unit Be Used?

A fan filter unit can be used widely in clean rooms. This is where you need to provide the workers with the best air quality and ensure no particulates get into the cleanroom. Yes, there are some sensitive cleanroom operations that do not need particulates. As such, a cleanroom fan filter unit is necessary.

Clean rooms are not the only places you can use a fan filter unit. You could also use the same in places such as dust-free operation tables, assembled dust-free rooms, dust-free production lines, and more.

Some users would also customize the unit to work on simple clean workbenches, clean storage closets, and more. As you can see, you can always customize the FFU unit to work great in areas you need a clean air supply.

FFU unit used in Pharma

FFU unit used in Pharma

What are the Components of an FFU Unit?

Here is a list of some of the most common components of an FFU unit.


The Control Unit

It is from the control unit that you can operate your fan filter unit. The control unit gives you various options to consider while setting up the FFU unit. Some of the common speed options include speed, runtime, and more. So, if you want to increase the speed, the panel should do a good job of helping you handle your application better.



It is also called the shell. The shell is crucial for housing all the components of an FFU unit. For this reason, it is built to be strong and durable. Sunnyda can make the housing out of aluminum, stainless steel, and more, depending on the user’s needs. Sunnyda can accommodate more material requests to ensure the unit works great for your needs.

The Primary Filter

Like most filtration systems, there is also the primary filter. The work of the primary filter is to help eliminate most of the large particulates from the air before it gets to the HEPA filter. The primary filter will be the most replaced because it has to trap the debris. This debris can sometimes damage the HEPA filter or easily clog it. As such, having a primary filter is essential.


The HEPA filter

This is a high-efficiency filter important for removing up to 99.99% of the particulates in the air. So long as the particulate is larger than 0.3 microns, the HEPA filter will remove it. Not to worry as the filter will always leave you with the best air quality.

Sometimes rather than using the HEPA filter, an FFU unit can have the ULPA filter. This filter is commonly used where there is the need for better air quality because of the sensitive cleanroom operations.


Airflow Equalization Unit

This is an additional component crucial for equalizing the air in the unit. The equalization is important so that there is better airflow from the FFU unit. Keep in mind that the air velocity needs to be maintained within the set range. So, such a component will be great to make sure this remains a reality. Always specify your needs when ordering an FFU unit from Sunnyda so that the air equalization unit can be set up correctly.

Fan for FFU Unit

Fan for FFU Unit


Sometimes it can be referred to as an impeller. Well, it is necessary for drawing in the air so that it can be sent to the cleanroom. The fan or impeller operation can be adjusted in terms of speed and tilt.

A forward tilt is vital for increasing its sagittal flow of the air in the unit. As such, it would help in removing the dust from the clean area. The backward tilt is ideal for reducing the energy use of the unit and will also keep the operating noise to a minimum. Sometimes you might not even know it is running.



The motor is important for keeping the impeller running correctly. Sunnyda uses the latest technology in ensuring the motor delivers on the best lifespan. On average, you are looking at a lifespan of 50,000 hours. Since the motors are oil-free, have to overheat protection, and sealed bearings, you are sure of the best durability.


Air Duct Connection

This is where the air ducts leading to the cleanroom are connected. The connection must be done correctly to ensure no leakages. Also, this helps in maintaining the best air velocity to the cleanroom always.


How Does a Fan Filter Unit Work?


FFU unit

Multiple Sunnyda FFU Units Ready for Shipping

A fan filter unit operation is not complex as you will get to see. It works by drawing air into the static pressure box by using its fan. Once the air is in the box, it is then pushed across the HEPA or ULPA filter for cleaning and filtration.

Once the air is filtered, the fan will still push it into the cleanroom at a constant speed. The constant speed of air is crucial to the performance of the various processes in the cleanroom. This speed is adjustable depending on the application. The speed is 0.45m/s with a change of 20% whenever necessary.

As simple as that, the FFU will ensure that you always have the best air quality and proper circulation in the cleanroom.


Is the FFU Unit Silent?

Yes. The FFU unit has a silent motor to run the fans. This ensures you do not have to worry about the unit being too loud for various applications. Some people do not even notice that the unit is running. As such, it would be a great thing to own today for your cleanroom.


Is the FFU Unit Environmentally-Friendly?

Yes. The FFU Unit is designed to be environmentally-friendly. This is because of the materials used to make it. Such materials include aluminum-zinc clad sheets. The material boasts of remaining corrosion-resistant for a long time even if it is exposed to the elements. If it can be corrosion-resistant, there is no need for replacing it. So, it will be a great product for the environment as it does not end up in landfills more often.

Other features of the material include being lightweight and strong. These two ensure that your FFU unit is also easy to install and lasts for longer respectively.

Users also love it for having a beautiful and elegant look on overall. The last thing people want is to get a unit that would not deliver on the best finish for their cleanroom. Well, do not worry so much about it when picking the Sunnyda FFU Unit.

Different components for a FFU unit


What is the Weight of the FFU Unit?

The total weight of the FFU unit is 24kg. Most users should find it being lightweight generally. Such a weight for a critical cleanroom component means you can install it easily without requiring expensive lifting equipment.


Is the FFU Unit Energy-Efficient?

Yes. Sunnyda has designed to be great at saving energy the user might use to power it on overall. This comes down to the motor used in the FFU unit. The motor, other than being silent, is still energy-efficient. As such, the user will not have to worry a lot about the increase in energy costs.

Having low power consumption also means that the unit has low operating costs. It is estimated that the FFU unit can last for over 50,000 hours. Such a lifespan means you will not have to spend a lot of money replacing the unit any time soon.


Why Pick the Sunnyda FFU Unit?

If you have not used Sunnyda products before, you might not be sure why you may want to use buy the FFU unit. Here are some quick reasons many people prefer the Sunnyda FFU units;

  • The company has over two decades of making the best FFU units
  • The company has competitive prices you may like on FFU units and other products
  • The brand is ISO9001 certified to guarantee high-quality products
  • The support team is available 24/7 to help you with any questions you might have
  • The company is a one-stop-shop for other cleanroom equipment
  • The brand has a great warranty on FFU units and other equipment for your cleanroom

single FFU unit

A customized single small FFU unit

Sunnyda FFU Unit is ISO9001. What Does That Mean?

The ISO9001 certification means that the company has demonstrated its ability to consistently produce services and products that meet the regulatory and customer requirements. Also, the company has demonstrated continuous improvement in terms of the services and products it provides.

As such, you can easily see why Sunnyda has many clients who trust its services and products. The company also strives to ensure its service and product delivery remain top-notch all the time.


What Are the Features to Consider When Picking an FFU Unit?

You should always take your time to understand what an FFU unit will do for your project. Here are some important features to keep in mind when picking the best FFU unit for your next project.

  • Look at the size of the FFU unit. It has to match the room size specifications and the space allocated to set it up.
  • The material used to make the FFU unit is crucial too. It should be durable and able to stand up to regular use of the FFU unit.
  • The FFU unit airflow performance should be within what you need for your application. It would be nice if the airflow can be adjusted to suit your needs.
  • The noise level should be within the acceptable range. No one wants a noisy FFU unit that might make it hard to work in the cleanroom.
  • Look at the maintenance needs too. A good FFU unit should not require a lot of maintenance. This would make it hard to run the cleanroom when you have to worry about the FFU unit breaking down all the time.

In case you are not sure how to choose the best FFU unit, Sunnyda can step in to help you further. You will end up with the right FFU unit when the Sunnyda experts can point you in the right direction.


What is the Startup Check List for an FFU Unit?


FFU unit

Vacuuming an FFU Unit

There are a few things to keep in mind before you can start using the FFU unit. Here is a quick checklist to keep in mind.

  • Check the voltage and wiring to ensure everything is set up correctly
  • Check to see if the blower wheel can rotate freely and has not been misaligned during installation or shipping
  • Ensure the nuts, screws, and bolts are correctly tightened
  • Proceed to apply power and check if the blower wheel is rotating correctly. Sunnyda tests the blower wheels to ensure they are working correctly before shipping. However, sometimes problems can occur during shipping. So, testing ensures everything is working correctly. Always check the wiring if the blower wheel is not working.

Now that you are satisfied everything is working as expected, go ahead to start using the FFU unit.


What are the Cleaning and Maintenance Needs for an FFU Unit?

It is advisable you periodically clean and maintains the FFU unit as the manufacturer recommends. Each time the FFU unit is not cleaned, it could lead to more dirt accumulating on the impeller. This would lead to more vibrations thus causing more strain on the motor bearings.

You will need a series of preventative maintenances to increase the motor and fan life. It is advisable to inspect the motor, filter, and fan wheel every three months. Based on what you find after the inspection, you can decide if the FFU unit needs an overhaul or not.

If these parts are in great condition, you can stretch the inspections to every six months. However, if they become easily dirty, sometimes monthly service might be necessary.

So, what items need periodic maintenance? Here are some of the things you will have to consider during the periodic service.

  • Change the primary filter
  • Clean the fan wheel to ensure it is working smoothly and quietly as much as possible
  • The motors are mostly equipped with lubricated bearings. This means no lubrication is necessary. However, you can still maintain the motor as recommended by the manufacturer.

It is advisable to always create a checklist of the different maintenance needs you have to accomplish on an FFU unit.

FFU unit layout

Layout for the customized FFU unit

How Do You Transport and Store an FFU Unit?

Sunnyda does a good job of packing the FFU unit correctly. This means that you can end up with a well-packaged product that does not easily get damaged while shipping. Take note of the high-efficiency filter as it would be packaged differently.

When you receive the package, take good care of it too. This includes using the right machines to transport the FFU unit. As much as it might not be the heaviest, it also needs to be carried properly. You could have two people carrying the unit together ensuring it does not fall.

As for storage, it also needs to be stored correctly in a warehouse with temperature ranges from -10℃~+40℃ and its relative humidity, not more than 80%.

The room where you store the FFU unit should not have corrosive gases. The last thing you need is for the FFU unit to start corroding even before it is installed.


Fan Clean System Vs. FFU Unit. Why is an FFU Unit Better?

You are likely to come across a fan clean system and an FFU unit in clean rooms. As much as they might seem like they do the same job, the FFU unit will have more performance benefits. Here is why;

  • The FFU unit offers a laminar flow. This is because the fan clean system design cannot be able to generate laminar flow. As such, it would be hard to maintain the best cleanroom conditions your application needs.
  • The other issue with a fan clean system is that when the fan in the system fails, the whole system stops working. This is because it has a single fan. As for the FFU unit, the model can have multiple fans. So, the unit can keep on working even when one of the fans fails.
  • The lifespan of the high-efficiency filter in the FFU unit will be better than in a fan clean system. Several reports have shown that the airflow in a fan clean system is often inconsistent. This is based on how the HEPA filter is setup. It is why it can also need replacing earlier.
  • The FFU unit also has a better way of keeping the operation noise lower. The same cannot be said for the fan clean system which tends to be noisy.

The worker is installing the FFU Unit

The worker is installing the FFU Unit


What Makes an FFU Unit Great for the Electronics Industry?

Most people might not be sure if setting up an FFU unit in an electronics cleanroom is a good idea. If that is the case, below are some reasons why it might be a necessary option for you to consider.

  • The FFU unit is highly flexible. As such, you would be able to customize it to your needs better. All you need is to adjust the air velocity to have the FFU unit tailored to your needs.
  • The FFU unit will also shorten the construction period for setting up a comprehensive purification system. Also, the FFU unit uses fewer amount of air ducts so it should help you keep the costs lower too. It normally takes a few days to set it up.
  • As much as the initial cost of the FFU unit might be higher, it becomes cheaper with time to run it. You will not have to worry so much about the maintenance costs. In most cases, you only have to do an inspection every three months to see if everything is running correctly.

interior components FFU unit

Section view for a FFU unit

How Do You Install an FFU Unit?

The Sunnyda FFU unit will come completely assembled from our factory. In most cases, the HEPA filter will be in a separate carton. The same applies to other accessories you may want to include with your FFU unit. Here is a quick summary of how you install the FFU unit.

  • Remove the unit from the shipping box and inspect for any possible damage. You can always raise any concerns with Sunnyda in case there is damage.
  • Proceed to install any filters that are in a separate box. Follow the filter installation instructions from the manual. Once you have installed the filters, you are ready for the next step.
  • Raise the unit into its designated position in the ceiling grid. You will need to attach it to the ceiling grid using the supplied installation bolts. Ensure they are tightened correctly to prevent the unit from falling off the ceiling.
  • You can adjust the level of the unit so that there is adequate compression on the gasket where the filters are housed for a proper seal.
  • Proceed to connect power to the FFU unit before you can start using it.

You may have to perform several tests as part of the checklist to ensure the unit is working correctly. Whenever you are stuck, always consult with the product manual or call the Sunnyda customer support.

steel plate powder coating FFU unit

Real shot for the FFU unit after production

How Do You Correctly Install a High-Efficiency Filter in an FFU Unit?

As much as you will not always replace the high-efficiency filter, there is a time it has to be done. What is crucial is that the replacement should be done right.

Before you can replace the high-efficiency filter, conduct a test on it ensuring that the filter needs to be replaced. In most cases, you replace it when there is an increase in the particle count in the cleanroom or when the filter is clogged.

You need to remove the FFU from the ceiling in most scenarios. Open the different screws on the unit to reach the HEPA filter embedded in the unit. Once you reach the old filter, remove it and replace it with the new filter. Make sure to keep the sheet metal from touching the paper media. Sometimes any contact can lead to the damage of the filter media.

Once the filter is correctly positioned, you can now close the housing and reattach the screws. Proceed to reinstall the FFU unit to its position.

It is worth mentioning that each time you replace the HEPA filters, use the new gaskets too. This ensures no additional sealing is necessary.

Sunnyda will provide you with all the important maintenance steps to take when replacing the high-efficiency filters or any other filter type. Just make sure you are using the correct replacement products to maintain the overall performance of the FFU unit.


How Can You Troubleshoot the Common FFU Unit Problems?

It is important you understand how to solve some of the common issues that might arise with your FFU unit. Here are some quick troubleshooting tips to get you going.

Low air velocity

When this happens, check the primary filter. If it is clogged, simply replace it. You may also have to clean it where necessary.

Another solution is to adjust the speed of the blower. You can always increase the speed to get a higher blower output.

Check the power of the FFU unit ensuring it has proper voltage, frequency, and amperage.

If it seems like the air velocity is still low, replace the HEPA or ULPA filter.

front view of FFU unit

Different air volumes for different uses

High Air Velocity

Sometimes you can also experience high air velocity too. For this one, simply adjust the speed to a low-speed setting.


Excessive contamination

Excessive contamination can sometimes lead to non-laminar flow. Keep in mind that a cleanroom needs a laminar flow.

When excessive contamination is detected, check to see if there are any large obstructions in the airflow pattern.

Also, check to see if there are any other air moving devices in the cleanroom that might disrupt the laminar airflow.

You can also conduct a photometer and smoke test to check if the HEPA or ULPA filter is not filtering as expected. You can replace or reseal the filter to improve performance.


The motor does not run

The first thing to do is check if there is power going to the motor. Also, it should be at the correct voltage.

Check to see if the speed controller also has power. There are times the speed controller might be at 0%. This will make the motor not to run, so increase the speed to turn on the motor.

Check the wire harness between the motor and speed controller. It should be working correctly if you want the motor to run too.

If you are experiencing any more problems, do not hesitate to contact Sunnyda for more help. The customer care team is always available to help where possible to keep your FFU unit running correctly.



From the guide above, it is easy to see how an FFU unit is important for your cleanroom operation. There is no doubt you would always want to use it more often to see how it makes your cleanroom better. It is not just for your cleanroom, but other areas where there is a need for improved air quality.

If you are interested in getting one, talk to Sunnyda today for more information or to place your order.

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