Clean room purification equipment FAQ and selection guide

There are many types of clean room purification equipment, and different products play different roles in air filtration, clean air supply, personnel purification, material transfer, local cleaning and environmental control. Equipment selection usually requires comprehensive consideration of cleanliness level, processing air volume, air supply speed, system resistance, filtration efficiency, installation space, control method, operating time and specific process environment.


Aili Industrial FAQ and Selection Knowledge Center focuses on FFU, EFU, BFU, air filter, high-efficiency air supply outlet, fan box, air conditioning box, air shower room, transfer window, clean workbench, clean shed, weighing room, laminar flow equipment and intelligent control system to sort out common problems in the design, selection, installation, operation and maintenance of clean room purification equipment.


Users can search for relevant answers by product category, question type or application industry, or contact Aili Industrial for equipment configuration and selection communication based on project parameters.

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All clean room purification equipment FAQs

Filter by product, problem type and application industry to find technical issues and selection content related to project conditions.

Aili industrial lithium battery dedicated EFU FFU

This section mainly explains the basic principles of FFU, air volume calculation, wind speed setting, quantity configuration, filter selection, centralized control and the differences between different air supply equipment, helping users make selections based on cleanliness, space, air volume, static pressure and control requirements.

Aili Industry can provide selection suggestions for FFU specifications, air volume, filter level, installation quantity and group control method based on the clean room area, ceiling structure, cleanliness level, air exchange frequency, equipment resistance and control requirements.

EFU FFU air filter unit for Aili Industrial Panasonic placement machine (1)

This section mainly introduces the structure, application scenarios of EFU and the differences between EFU and FFU, helping equipment manufacturers choose appropriate equipment-side filtration and air supply solutions based on installation size, target air volume, external static pressure and clean air requirements.


Aili Industrial can customize the EFU dimensions, box height, air volume, wind speed, filtration efficiency, installation method and control interface according to the internal space of semiconductor equipment, SMT equipment, automation equipment and local clean units.

Aili Industrial BFU filter unit

This section focuses on the structural differences between FFU, BFU and high-efficiency air supply outlets, as well as the selection methods in new clean rooms, partial renovation projects and centralized air supply systems.



When choosing BFU, high-efficiency air supply vents or FFU, you need to comprehensively consider whether it has a centralized air supply system, available static pressure, installation space, noise requirements, maintenance methods and post-control requirements. You cannot judge based on filter efficiency alone.

Aili Industrial HEPAULPA Filter

This section mainly introduces the difference between HEPA and ULPA, the selection method of H13 to U16 filtration levels, and the basis for judging the filter replacement cycle, helping users take into account filtration efficiency, system resistance, operating energy consumption and maintenance costs.



The higher the filter level, the better. The actual selection must be comprehensively determined based on the target cleanliness, detected particle size, system air volume, available static pressure, filter installation size, sealing method and operating energy consumption.

Aili Industrial BFU filter unit

Frequently Asked Questions about Clean Workbench and Selection of Airflow Forms

The clean workbench provides a relatively independent local clean environment for the operating area through fans and air filters. According to the flow direction of clean air, common forms include horizontal flow clean benches and vertical flow clean benches.


This section mainly compares the differences between the two air flow forms in terms of structure, operating space, product protection, air flow direction and applicable scenarios, helping users choose a suitable clean workbench based on the process flow.

Aili Industrial DC Fan Chassis

The fan box is used to provide the required air power for air conditioning systems, purification equipment or local air supply systems. The main parameters of the fan box include air volume, full pressure or static pressure, motor power, speed regulation method, noise, interface size and installation direction.


This section mainly explains how to determine the air volume and static pressure of the fan box, and helps users make selections based on pipeline resistance, filter resistance, air outlet resistance and system margin.。

Aili industrial plate chemical filter

Chemical filters are primarily used to treat specific gaseous pollutants in the air and have different working goals than HEPA or ULPA filters for particulate matter filtration. Different chemical filter materials have different processing capabilities for acidic gases, alkaline gases, organic gases and other pollutants.


This section mainly introduces the types of pollutants that chemical filters can handle, as well as the pollutant composition, concentration, temperature and humidity, target removal requirements and replacement cycles that need to be paid attention to when selecting filter materials.

Aili Industrial BFU filter unit

Frequently Asked Questions about FFU and Intelligent Control of Clean Equipment

The clean workbench provides a relatively independent local clean environment for the operating area through fans and air filters. According to the flow direction of clean air, common forms include horizontal flow clean benches and vertical flow clean benches.


This section mainly compares the differences between the two air flow forms in terms of structure, operating space, product protection, air flow direction and applicable scenarios, helping users choose a suitable clean workbench based on the process flow.

Search by category of clean room purification equipment

1. Clean air supply and circulation equipment


FAQ classificationClassification description
FFU FAQ →FFU working principle, specifications and dimensions, air volume and speed, filtration efficiency, centralized control, installation and maintenance and clean room application
EFU FAQ →EFU structural height, equipment-side installation, ultra-thin design, air volume calculation, filter configuration, control method and customized selection
BFU FAQ→BFU structure, air volume and static pressure, ceiling installation, filter configuration, and differences from FFU and high-efficiency air supply outlets
Frequently Asked Questions about Fan Box→DC fan chassis, AC fan chassis, air volume and static pressure, pipe connections, energy-saving transformation, noise and control methods
Frequently Asked Questions about Air Conditioning Box→Air treatment process, functional section configuration, filter section, fan section, surface cooling section, heating and humidification and project selection
Clean air supply system problems→Cooperation between MAU, FFU, DCC and other systems, as well as clean room air supply, return air and pressure difference design
2. Air filtration products


FAQ classificationClassification description
Primary filter FAQ →Primary filter type, efficiency, dust holding capacity, resistance, installation location and replacement cycle
Frequently Asked Questions about Medium Efficiency Filter→Selection, air volume, resistance and air conditioning system application of bag type, plate type and other medium efficiency filters
HEPA Filter FAQ →H13, H14 efficiency, structural form, rated air volume, initial resistance, final resistance and leak detection method
ULPA Filter FAQ→U15, U16, U17 efficiency levels, application scenarios and differences from HEPA filters
Frequently Asked Questions about High Temperature Resistant Filters →Operating temperature, material configuration, installation sealing and high temperature working conditions precautions
Frequently Asked Questions about Large Air Volume Filters→Air volume, resistance, structure and air conditioning system application of V-type, box-type and other large air volume filters
Liquid tank seal filter FAQ →Liquid tank sealing structure, sealing method, installation conditions, leak detection and replacement methods
PTFE Filter FAQ →PTFE filter material characteristics, resistance, filtration efficiency and clean equipment applications
Chemical Filter FAQ →AMC control, target gas, filter material selection, processing air volume, installation location and replacement judgment
3. Clean air supply terminal equipment


FAQ classificationClassification description
Frequently Asked Questions about High-Efficiency Air Supply Vent→High-efficiency air supply outlet structure, air volume, size, static pressure box, filter configuration and installation method
Liquid tank sealing high-efficiency air supply outlet FAQ →Liquid tank sealing, DOP leak detection, filter installation and replacement, and high clean environment applications
Disposable high-efficiency air supply outlet FAQ →Integrated structure, usage conditions, installation methods and overall replacement method
Top-intake high-efficiency air supply outlet FAQ →Top air inlet structure, air duct connection, ceiling space and installation requirements
Side air inlet high-efficiency air supply outlet FAQ →Side air inlet structure, installation space, air duct layout and applicable projects
Laminar flow hood FAQ →Vertical laminar flow, horizontal laminar flow, clean air flow coverage, wind speed and filtration configuration
4. Personnel and material purification equipment
FAQ classificationClassification description
Frequently Asked Questions about Air Shower→Dimensions, wind speed, nozzles, interlocking and installation of single, multi-person, pass-through and corner air showers
Frequently Asked Questions about Cargo Shower→Cargo shower, channel size, door structure, air shower time and logistics purification process
Frequently Asked Questions about Delivery Window→Mechanical interlocking, electronic interlocking, static, dynamic, self-cleaning transfer windows and installation methods
Clean Wardrobe FAQ→Clean laundry storage, air supply filtration, UV function and clean area configuration
Frequently Asked Questions about Clean Shoe Cabinets →Clean shoe storage, ventilation filtration and changing area configuration
Frequently Asked Questions about Material Purification→Cleaning, blowing, transferring and contamination control before materials enter the clean area
5. Local cleaning and operating protective equipment
FAQ classificationClassification description
Clean bench FAQ →Structure, wind speed, filters and applications of single, double, horizontal flow and vertical flow workbenches
Clean shed FAQ →Clean shed area, cleanliness, number of FFU, enclosure structure, installation and expansion methods
Weighing Room FAQ →Negative pressure control, air flow organization, filtration system, pressure difference and weighing operating environment
Sampling room FAQ→Sampling area cleanliness control, air flow mode, filtration configuration and installation conditions
Laminar Flow Workspace FAQ →Local clean airflow, coverage, wind speed uniformity and process equipment support
Safety cabinet FAQ→Safety cabinet type, air flow protection, filtration configuration and applicable operating range
6. Control system, fans and core components
FAQ classificationClassification description
Frequently asked questions about FFU group control system→Single machine control, partition control, centralized monitoring, work and duty modes, communication and address settings
FFU touch screen controller FAQ →Type 86 controller, device quantity, zone settings, wind speed adjustment, start and stop and status viewing
Computer group control system FAQ →Multi-partition management, single machine control, parameter setting, operation plan and equipment status monitoring
Frequently Asked Questions about EC/DC Fans→Differences, speed regulation methods, input power, noise and working condition matching between EC, DC and AC fans
Fan motor FAQ→Motor type, power, speed, temperature rise, control method and fan matching
RS485 communication FAQ→Communication cabling, device address, distance, interface, troubleshooting and group control connection
6. Control system, fans and core components
FAQ classificationClassification description
Frequently asked questions about FFU group control system→Single machine control, partition control, centralized monitoring, work and duty modes, communication and address settings
FFU touch screen controller FAQ →Type 86 controller, device quantity, zone settings, wind speed adjustment, start and stop and status viewing
Computer group control system FAQ →Multi-partition management, single machine control, parameter setting, operation plan and equipment status monitoring
Frequently Asked Questions about EC/DC Fans→Differences, speed regulation methods, input power, noise and working condition matching between EC, DC and AC fans
Fan motor FAQ→Motor type, power, speed, temperature rise, control method and fan matching
RS485 communication FAQ→Communication cabling, device address, distance, interface, troubleshooting and group control connection

About Aili Industry

Aili Industry focuses on the R&D and production of FFU, EFU, BFU, air filters, high-efficiency air supply vents, fan boxes, air showers, transfer windows, clean benches, clean sheds, weighing rooms and clean equipment control systems.

Relying on a 30,000-square-meter manufacturing base, Aili Industry covers production links such as fans, motors, control systems, sheet metal processing, air filters, and complete machine assembly. It can provide product selection and customization support based on clean room projects, equipment-side clean air supply, local clean environment, and energy-saving renovation projects.

Contact Us

Aili Industrial develops and manufactures FFU, EFU, HEPA/ULPA air filters, high-efficiency air supply vents, fan boxes and other clean air equipment. Relying on motors, fans, control systems, filters and complete machine supporting capabilities, we provide selection and customization support for clean room and production equipment projects.

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