fan filter unit specifications

Fan Filter Unit (FFU) Specifications

According to the different requirements of clean room, fan filter units (FFU) have different components. However, no matter what kind of fan filter unit is, it still has basic parts that enable it to provide clean air for cleanroom. In this article, VCR will provide the fan filter unit specifications.

Điểm neoI. Fan Filter Unit (FFU) Structure

These fan filter unit (ffu) components include pre-filter, housing, air pipe connecting parts, motor, blower wheel, airflow equalization device, final filter, protective net, controllerĐiểm neo

1. Pre-filter

The main task of pre-filter is to prevent damage to HEPA filter caused by construction debris.

Điểm neo2. Housing

The material of housing is steel, galvanized steel, powder-coated steel, stainless steel, etc. There are varying options for different use environments. The housing thickness is about 1.2~2.0 cm.

Điểm neo3. Air pipe connecting parts

In cleanrooms with a low level of cleanliness, there is no static pressure on the ceiling, the air pipe connecting parts make the connection between air pipe and FFU more convenient.

Điểm neo4. Motor

Both AC motors and DC motors are used in fan filter unit. DC motor is big, expensive, easy to control and highly energy-consuming, while AC motor is smaller, cheaper. and more energy-saving. The control of AC motor requires the corresponding technology. The service life of motor in fan filter unit ranges from 40 000 to 100 000 hours.

Some high-quality motor has oil-free lubrication, sealed bearings, thermal overload protection, and long service life.

Điểm neo5. Blower wheel

There are two types of blower wheel: the forward curved centrifugal type and the backward curved centrifugal type.

The forward one provides large air volume and enhances the dust removement, while the backward one reduces the energy consumption and noise.

fan filter unit specifications: blower wheel

Điểm neo6. Airflow equalization device

With varying demands of FFU, many manufacturers have begun to equip fan filter unit with the airflow equalization device to adjust the outlet airflow of FFU, thereby improving the flow distribution in cleanroom.

There are 3 types of equalizing devices: The first is an orifice plate, and the outlet airflow of the FFU is adjusted mainly by the dense distribution of the holes on the plate. Second is the grille, which adjusts the FFU outlet airflow mainly through the density of the grille. The other is the power curve, which mainly induces the flow of airflow through the shape of the curve, and at the same time regulates the airflow through the dense distribution of holes on the curve.

Điểm neo7. Filter

Final filter is HEPA filter or ULPA filter.

Read more about these filters

HEPA filter for fan filter unit

HEPA filter

Điểm neo8. Protective net

Its function is to protect the filter, most of which is anti-static

FFU protective net

FFU protective net

Điểm neo9. FFU controller

FFU can be roughly divided into several types of switch, continuous adjustment, computer control, etc. The functions performing at the same time include single control, partition control, alarm, and operation status display.

fan filter unit (ffu) control switch


II. Fan Filter Unit (FFU) Specifications


FFU1175 FFU575
Size 1175 x 575 x 300 mm 575 x 575 x 300 mm
Housing material Stainless steel/ powder-coated steel/… Stainless steel/ powder-coated steel/…
Filter HEPA H13 99.95%@0.3 micron HEPA H13 99.95%@0.3 micron
Filter size 1170 x 570 x 69 mm 570 x 570 x 69 mm
Airflow 1080 m3/h 550 m3/h
Air velocity 0.45 m/s 0.45 m/s
Power 220V 50Hz 1 phase
Noise 55 dB

If you keep these fan filter unit (ffu) features on your mind, you can easily purchase a better one. So you must know the requirement of the fan filter unit specifications before buying it. Then, you can select the best FFUs from many brands.


Vietnam Cleanroom Equipment (VCR) specializes in providing cleanroom equipment for construction contractors. We provide high-quality products with competitive prices and large quantities nationwide. The equipment includes:

Differential pressure gauge, FFU Fan Filter Unit, Pass box, Clean room air filter, HEPA box, Clean booth, cleanroom steel door, Isolator cabinet, and other equipment

For details, please refer to Vietnam cleanroom equipment official website

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