HEPA high efficiency filter

Aili Industrial HEPA high-efficiency filter is a high-efficiency air filter used for air particle filtration. It is mainly installed in clean air conditioners, air handling units (AHU), FFU, clean equipment and other air purification systems.

The product adopts a pleated filter material structure, which forms a larger effective filtration area within a limited filter volume, and reduces the use of traditional separation materials through a partition-less structure.

According to different project requirements, Aili Industrial HEPA high-efficiency filters can use glass fiber filter material or PTFE low-resistance filter material , and be equipped with aluminum profile frames, double-sided protective nets and different forms of sealing structures.

Products can provide H13, H14 and other HEPA filtration levels, and higher-level filtration products can also be configured according to project requirements. It should be noted that H13/H14 and U15/U16/U17 belong to different filtration level ranges, and the specific classification and test results should be determined based on corresponding standards and product testing data. Both EN 1822 and ISO 29463 use MPPS related test methods to classify and evaluate high-efficiency filters.

2. Product structure of Aili Industrial HEPA high-efficiency filter

3. Working principle of Aili Industrial HEPA high-efficiency filter

HEPA high-efficiency air filters do not filter particulate matter through simple 'sieve aperture'.

When air passes through high-efficiency filter materials, particulate matter will be affected by a variety of filtration mechanisms, including:

Inertial collision → interception → diffusion → comprehensive effect inside the filter medium

For high-efficiency filters, the filtration efficiency does not remain exactly the same at all particle sizes. EN 1822 and ISO 29463 systems use **MPPS (Most Penetrating Particle Size, the most penetrating particle size)** as an important evaluation condition.

Therefore, to judge whether a HEPA filter reaches H13 or H14, you should check the test results under the corresponding standards, not just the '0.3μm filtration efficiency' data.

4. What is the difference between H13 and H14?

According to the classification of EN 1822/ISO 29463, H13 corresponds to ISO 35 H, and H14 corresponds to ISO 45 H; the overall efficiency requirements of the two are different, and they also involve evaluation requirements such as local penetration rate.

5. Product features of Aili Industrial HEPA high-efficiency filter

6. Product specifications of Aili Industrial HEPA high-efficiency filter

7. Common sizes and reference parameters of Aili Industrial HEPA high-efficiency filters

Relevant specifications support non-standard customization. The actual operating air volume and resistance need to be confirmed based on the filtration grade, filter material, installation method and test conditions.

8. Different sealing structures of Aili Industrial HEPA high-efficiency filters

The sealing structure of the high-efficiency filter needs to match the on-site installation frame. The performance of the filter body and the sealing status of the system after installation need to be considered during project design and acceptance.

9. Gasket type HEPA filter

The gasket type HEPA filter is matched with the filter mounting frame through a sealing gasket such as EPDM.

This structure is suitable for air treatment equipment that uses a compression method to install the filter. During actual installation, it is necessary to ensure that the sealing surface between the filter and the frame fits perfectly.

Common configurations include: 610×610mm → 570×1170mm → non-standard sizes. Filter thickness can be selected based on system resistance and installation space.

10. Knife edge HEPA filter

The knife-edge HEPA filter adopts a knife-edge structure and a sealant groove. It is often used in clean air treatment systems that have clear requirements for the sealing structure of the filter installation.

When selecting a knife edge filter, you not only need to determine the filter size, but also confirm: knife edge position → liquid tank size → installation direction → sealant → filter thickness

Aili Industry can carry out matching design according to the installation structure of the filter section of the equipment.

11. Liquid tank seal HEPA filter

The liquid tank seal filter is inserted into the sealing liquid tank through the filter blade to form a continuous seal.

The liquid tank sealing structure is suitable for clean systems that require filter installation and sealing. In particular, the dimensions of the filter and liquid tank frame need to be confirmed simultaneously during the equipment design stage.

Aili Industrial can provide:

Top liquid tank → Side liquid tank → Liquid tank knife edge → Matching installation structure

The specific structure is determined according to the equipment design.

12. Glass fiber HEPA filter

Glass fiber is one of the common filter materials in the field of high-efficiency air filtration.

Aili industrial HEPA filters can use glass fiber filter material to increase the effective filtration area through the pleated structure.

Glass fiber HEPA filters can be used for:

Clean room → AHU → FFU → Pharmaceutical → Medical → Laboratory → Electronic manufacturing

The specific filtration level and product structure are confirmed according to project requirements.

13. PTFE HEPA filter

For some projects that have requirements for filter material properties, resistance or special environments, Aili Industrial also provides PTFE low-resistance filter material solutions.

The selection logic of PTFE filters is different from that of ordinary glass fiber filters. Product performance cannot be judged based on the material name alone.

Need to consider comprehensively:

Filter material → Filtration level → Air volume → Initial resistance → Temperature and humidity → Chemical environment → Sealing material

If the project has a special gas or chemical environment, it is also necessary to confirm whether the complete product materials such as frame, sealant and gasket are suitable.

14. Application scope of Aili Industrial HEPA high-efficiency filter

Aili Industrial HEPA filters are used in clean rooms, hospitals, laboratories, electronics manufacturing, pharmaceuticals and air handling systems.

15. Application of Aili Industrial HEPA high-efficiency filters in clean rooms

Cleanroom air handling systems often require multi-stage filtration to reduce the particle load entering the clean area.

HEPA filters can be installed in: AHU → Clean air conditioning box → FFU → HEPA air supply outlet →  The specific installation location of the clean equipment depends on the air flow organization and air treatment plan of the clean room.

For clean environments such as semiconductors, electronics, and pharmaceuticals, the filtration level needs to be determined based on the cleanliness level, number of air changes, air supply volume, and process requirements.

16. Application of Aili Industrial HEPA filters in AHU

AHU is an air handling unit, which usually includes different functional sections such as mixing section, filtration section, surface cooling section, heating section, and fan section.

HEPA filters can be installed in the corresponding filtration section of the air handling unit according to the system design.

Need to confirm when selecting: AHU air volume → number of filters → filter size → filtration level → initial resistance → fan residual pressure

If the system uses multiple filters installed in parallel, the air volume distribution of each filter needs to be considered at the same time.

17. Aili Industrial HEPA high-efficiency filter and FFU matching

FFU is a common terminal air supply equipment in clean rooms, usually consisting of a fan, box, filter and control system.

As one of the core filtration components of FFU, HEPA filter needs to be combined with:

FFU size → fan capacity → filter resistance → air supply volume → cleanliness level to match.

Aili Industry also has FFU, EFU and high-efficiency filter products, so for projects that require filters and clean equipment, specifications can be communicated from the overall structure of the equipment.

18. How to choose HEPA filter

19. HEPA high-efficiency filter selection should not only focus on filtration efficiency

Many purchasers first focus on H13 or H14, but the actual selection also needs to consider air volume and resistance.

For example, the same H13 filter:

610×610×70 → 610×610×93 → 610×610×117

Due to the different area and structure of the filter material, the corresponding initial resistance may also be different.

Therefore, the selection of HEPA filters should also consider:

Filtration efficiency + air volume + initial resistance + size + sealing + usage environment

20. HEPA high efficiency filter replacement cycle

There is no set replacement cycle for HEPA filters that applies to all items.

The actual replacement time is related to the following factors:

Pre-filtration → Environmental dust → System running time → Air volume changes → Filter pressure difference → Cleanliness requirements

It is recommended to judge the filter status through pressure difference and cleanliness monitoring data during operation.

When the filter resistance continues to increase and affects the normal operation of the system, or when the filter is damaged or leaks, it needs to be inspected and replaced according to the maintenance system.

21. Precautions for installing HEPA high-efficiency filter

22. HEPA high-efficiency filter testing

The testing of high-efficiency filters usually needs to be carried out according to corresponding standards and project requirements.

Testing content may include: filtration efficiency → initial resistance → size → appearance → sealing → leak detection

For H13, H14 and ULPA grade filters, the filtration efficiency evaluation needs to be combined with corresponding test methods. Both the EN 1822 and ISO 29463 systems regard MPPS as an important condition for the efficiency evaluation of high-efficiency filters.

23. Why does the HEPA filter adopt a partitionless structure?

The main feature of the partition-less structure is that the filter material is directly pleated and fixed by hot melt glue, etc., and traditional aluminum foil or paper partitions are no longer used to maintain the distance between the filter materials.

This works:

But the absence of baffles does not mean that the filter has lower resistance under all operating conditions. The final resistance depends on the filter material, filter area, fold number, air volume and filtration level. The actual parameters need to be subject to product testing data.

24. Customization capabilities of Aili Industrial HEPA high-efficiency filters

25. Manufacturing supporting equipment for Aili Industrial HEPA high-efficiency filters

Aili Industrial has long been engaged in the production of clean equipment and air filtration products. Its products cover HEPA filters, ULPA filters, FFU, EFU, fans and other purification equipment.

In the HEPA filter project, Aili Industry can carry out according to different project needs:

Filter material selection → Filter design → Frame processing → Filter material folding → Sealing → Testing → Packaging

For clean room projects that require FFU, EFU and high-efficiency filters at the same time, matching communication can be carried out based on the size and filtration parameters between the equipment.

This product matching method is more convenient for projects that require unified specifications, non-standard sizes and overall coordination of clean equipment.

26. What purchasing needs does Aili Industrial HEPA high-efficiency filter suit?

27. What is the difference between HEPA high efficiency filter and ULPA ultra high efficiency filter?

28. Frequently Asked Questions about HEPA High Efficiency Filter FAQ

What is a HEPA high efficiency filter?

HEPA high-efficiency filter is a high-efficiency air filter used for air particle filtration. It is commonly used in clean rooms, air handling units, FFU, medical, pharmaceutical, electronic manufacturing and laboratories.

What does HEPA mean?

HEPA is the abbreviation of High Efficiency Particulate Air, which is usually called high-efficiency air filter in Chinese.

Which one is suitable for clean room, H13 or H14?

Both can be used in clean rooms, the specific choice depends on the cleanliness level, system design and project requirements. H13 and H14 belong to different filtration levels and cannot be determined simply based on the words 'clean room'.

What is the filtration efficiency of H13?

According to the EN 1822/ISO 29463 system, the overall efficiency of H13 corresponding MPPS is not less than 99.95%. Specific products also need to meet corresponding local penetration rate requirements.

What is the filtration efficiency of H14?

According to the EN 1822/ISO 29463 system, the overall efficiency of H14 corresponding MPPS is not less than 99.995%. Specific products should be subject to the test results under the corresponding standards.

Does the HEPA filter have to be 99.97%@0.3μm?

It is not recommended to understand it this way. 99.97%@0.3μm is one of the common HEPA performance expressions in the industry, but the standard classification of H13/H14 needs to be combined with MPPS testing. Different standards and test methods cannot be mixed directly.

Can HEPA filters use PTFE filter media?

Can. Aili Industrial product information provides glass fiber filter material and PTFE low-resistance filter material solutions. The specific selection shall be confirmed according to the project requirements.

What sealing methods are available for HEPA filters?

Common structures include EPDM gaskets, liquid tank seals and knife edge seals, etc. Aili Industrial can configure them according to the equipment installation structure.

Can HEPA filters be custom sized?

Can. Aili Industry supports standard size and non-standard size HEPA filter customization.

Can HEPA filters be used in AHUs?

Can. HEPA filters can be used as high-efficiency filtration sections in air handling units. The specific selection needs to be based on the AHU air volume, filter size and system resistance.

Can HEPA filters be used with FFU?

Can. FFU usually needs to be equipped with a high-efficiency filter, which needs to be matched according to the size of the FFU box, fan capacity, filtration level and filter resistance.

Can HEPA filters be used in the semiconductor industry?

Can. Semiconductor clean environments will use HEPA or ULPA filters according to the cleanliness requirements of different areas. The specific level needs to be determined according to the clean system design.

Can HEPA filters be used in the pharmaceutical industry?

Can. HEPA filters are often used in pharmaceutical clean air conditioning and clean production areas. The specific grade and sealing structure are selected according to project requirements.

Can HEPA filters be used in hospitals?

It can be used according to the air purification design of specific areas. The filtration requirements of different medical areas are not exactly the same and need to be determined according to the project design specifications.

Is the lower the resistance of the HEPA filter, the better?

This cannot be judged alone. Filters need to be comprehensively selected between filtration efficiency, air volume, resistance, size and operating life.

How often should HEPA filters be replaced?

There is no uniform fixed period. It is usually determined based on filter pressure difference, cleanliness, air volume and actual operating environment.

How to tell if the HEPA filter needs to be replaced?

Judgment can be made based on changes in filter pressure difference, system air volume, cleanliness detection and filter appearance status.

Can HEPA filters be cleaned and reused?

It is generally not recommended to clean high-efficiency filter media yourself. The filter material and structure of the high-efficiency filter are manufactured through specific processes. Cleaning may affect the structure and sealing status of the filter material. Specifically, it should be handled in accordance with product maintenance requirements.

Can HEPA filter frames be made of aluminum profiles?

Can. Aili Industrial's existing product materials use aluminum profiles and undergo surface oxidation treatment.

Can HEPA filters use stainless steel frames?

Can be confirmed according to project requirements. For special environments, the frame, filter material and sealing materials need to be considered comprehensively.

Can HEPA filters be used as liquid tank seals?

Can. Aili Industrial's existing products include top liquid tank and side liquid tank structures.

How to choose the size of HEPA filter?

It is necessary to first measure the width, height and depth of the filter section of the equipment, and then confirm it based on the system air volume and filtration level.

What parameters do you need to provide when purchasing a HEPA filter?

It is recommended to provide:

Size → Filtration level → System air volume → Initial resistance requirement → Filter material → Sealing method → ​​Frame material → Usage environment → Quantity

29. HEPA high-efficiency filter selection information table

30. Aili Industrial HEPA High Efficiency Filter

Aili Industry provides HEPA high-efficiency filters, and has the ability to support FFU, EFU, ULPA filters, fans and other clean equipment products.

For different projects, we can start from the filter itself or combine it with the entire air treatment system for specification confirmation.

Filtration level → Air volume → Size → Resistance → Filter material → Sealing → Use environment

For standard size products, selection can be made based on existing specifications; for AHU, FFU, clean room and semiconductor projects, non-standard designs can also be made based on equipment structure and project parameters.

Aili Industrial has a production base of approximately 30,000 square meters. Product manufacturing involves fans, motors, control systems, sheet metal, filters and purification equipment. For projects that require HEPA filters + FFU/EFU + clean equipment , the same manufacturing system can communicate product specifications, reducing the interface confirmation work between different equipment.