1. Which clean rooms are suitable for high-efficiency filters without partitions?
High-efficiency filters without partitions are mainly used in clean air treatment systems that need to control particulate matter in the air.
Since the partition-less structure can fix the fold distance of the filter material through glue lines, it has a certain structural design space in terms of filter size, thickness and filter area, so it can be applied to a variety of clean equipment.
Common applications include:
industry
Typical application areas
Common equipment
semiconductor
Clean production areas and clean areas around equipment
FFU, EFU
Electronic manufacturing
Precision assembly and production clean area
FFU, clean shed
photovoltaic
Cell and module related production areas
FFU, clean air supply equipment
pharmaceutical
Clean production area and experimental area
Clean air conditioning, terminal air supply equipment
biology laboratory
Experimental operation area
Clean air supply equipment
Precision manufacturing
Precision machining and assembly area
FFU, clean shed
The specific product structure and filtration efficiency need to be determined according to project requirements.
2. Why do semiconductor clean rooms use high-efficiency filters without partitions?
Semiconductor production environments usually need to control particulate matter in the air, and some production equipment has certain requirements for installation space and air supply methods.
In such applications, filters usually need to be matched with FFU, EFU or clean air supply systems around the equipment.
The partition-less structure can design the filter thickness, filter area, etc. according to the internal space of the equipment, so it is suitable for some clean air supply equipment with limited space.
For semiconductor-related projects, in addition to focusing on filtration efficiency when selecting, you also need to pay attention to:
filter size
filter thickness
Target air volume
initial resistance
Sealing method
Fan static pressure
Equipment installation space
If it is an EFU application, the filter also needs to be matched to the overall structure of the device.
3. Is HEPA without partition suitable for electronic manufacturing clean rooms?
Can.
In the electronics manufacturing process, some precision products and production processes need to control particulate matter in the air.
HEPA without partitions can be used in FFU, clean booths, clean workbench and other clean air treatment equipment.
For example:
Precision electronic assembly
Display panel related production
Precision optical products
Electronic component manufacturing
Precision detection area
The specific filtration efficiency and air volume need to be determined according to the production process and clean room design requirements.
4. Can high-efficiency filters without partitions be used in pharmaceutical clean rooms?
The selection can be made based on the structure of the clean air conditioning system and terminal air supply equipment.
Pharmaceutical production environments often need to control particulate matter in the air, and also need to pay attention to the sealing performance, materials, and maintenance and replacement methods of filters.
If the high-efficiency filter without partitions is installed at the end of the clean room, key points need to be confirmed:
For different clean areas, the required filtration levels and air treatment methods may be different, so it is not appropriate to directly determine the filter model based on the industry name alone.
5. Are high-efficiency filters without partitions suitable for laboratories?
Can.
Clean air handling equipment in the laboratory may include clean workbenches, local clean equipment, and clean room air supply systems.
If the equipment space is relatively compact, a partitionless filter with corresponding thickness and structure can be selected according to the actual installation size.
Laboratory applications also need to determine filtration efficiency based on the specific experiment type, air handling requirements, and equipment design.
6. Where are baffleless filters typically installed in clean rooms?
The partitionless high-efficiency filter can be installed in different locations according to the equipment structure.
Common ways include:
FFU end
The filter is installed directly inside the FFU, and the fan pushes the air through the filter and then sends it to the clean area.
EFU device
The filter cooperates with the EFU fan system and is used in some clean equipment or local clean spaces.
Clean shed
The filter is installed on the top of the clean shed, and a corresponding clean airflow environment is formed through continuous air supply.
Clean workbench
The filter cooperates with the fan and workbench structure to provide filtered air to the operating area.
Clean room terminal air supply system
Filters can be installed in ceiling air supply units or other terminal filtration devices.
7. What should you pay attention to when choosing separator-less HEPA for semiconductor applications?
The selection of filters for semiconductor clean rooms usually needs to be considered from a system perspective.
First, the cleanliness and filtration efficiency requirements need to be determined, and then the filter size is determined based on the size of the equipment.
At the same time, the relationship between air volume and resistance also needs to be considered.
For example:
The filter area is smaller → the face wind speed may increase → the resistance may change → the fan operating point needs to be rematched.
Therefore, the filter cannot be selected separately from the fan and equipment.
For EFU used in semiconductor equipment, equipment height, maintenance space and filter replacement methods also need to be considered.
8. What parameters should be paid attention to in pharmaceutical applications of high-efficiency filters without partitions?
Filter selection for pharmaceutical clean rooms can focus on the following:
parameter
Main content
Filtration efficiency
Determine according to clean area requirements
filter size
Matches the terminal equipment installation space
Air volume
Matches the clean room air supply volume
initial resistance
Match the static pressure capacity of the fan
Sealing method
Make sure the filter is connected reliably to the mounting frame
Frame material
Choose according to clean environment
filter material
Choose according to project requirements
Maintenance method
Consider space for later replacement and maintenance
If the project has specific requirements for materials, testing documents or verification data, these should be confirmed in advance during the procurement stage.
9. What local cleaning applications are partitionless filters suitable for?
In addition to large clean rooms, partitionless high-efficiency filters can also be used in some local clean environments.
For example:
Precision assembly area
Product testing area
Experimental operation area
Clean workbench
Clean shed
Clean space inside the equipment
Clean area around semiconductor equipment
Such applications usually have certain requirements on equipment size and local air supply methods, so the filter needs to be designed in conjunction with the specific equipment.
10. What are the differences in the selection of partitionless filters in different industries?
Although different clean industries may use high-efficiency filters without partitions, the selection priorities are not exactly the same.
Application industry
Main factors of concern
semiconductor
Cleanliness, filtration efficiency, air volume, equipment height
Electronic manufacturing
Particle control, air volume, equipment structure
photovoltaic
Air volume, filtration efficiency, operating environment
pharmaceutical
Cleanliness requirements, sealing, materials and maintenance
laboratory
Filtration efficiency, air volume, installation space
Precision manufacturing
Particle control, localized clean airflow
Therefore, the specific application should be provided during the actual purchase, rather than just providing the information 'HEPA required'.
11. Application of Aili industrial partitionless high-efficiency filter
Aili Industry can provide partition-less high-efficiency filter configurations according to different clean equipment and industry applications.
Since Aili Industry also involves products such as filters, fans, motors, control systems, FFU and EFU , filter selection can be considered in combination with the overall machine structure in actual projects.
For example, the EFU used in semiconductor equipment needs to be determined at the same time:
Equipment height + filter thickness + air volume + filtration efficiency + fan static pressure + installation method
For electronics, photovoltaics and other clean manufacturing projects, specifications can be matched based on the clean area, equipment type and target air volume.
If the customer already has equipment drawings or filter installation dimensions, corresponding specifications can be designed based on the existing structure.
12. What information is needed to select a high-efficiency filter without partitions?
In order to facilitate manufacturers to accurately match products, it is recommended to provide the following information when purchasing:
project
Example
Use industry
Semiconductors, electronics, pharmaceuticals, etc.
Use equipment
FFU, EFU, clean shed, etc.
filter size
Length×width×thickness
Target air volume
m³/h
Filtration efficiency
H13, H14, etc.
Installation method
Top mounting, side mounting, etc.
Frame material
Aluminum alloy, stainless steel, etc.
Sealing method
Gaskets, liquid tanks, etc.
Usage environment
Normal temperature, special environment, etc.
The more complete the information, the better it is to determine the appropriate filter structure and specifications.
13. FAQ
Are high-efficiency filters without partitions suitable for semiconductor clean rooms?
Can. The partition-less high-efficiency filter can be used with clean air supply equipment such as FFU and EFU. The specific filtration efficiency, size and air volume need to be determined according to the requirements of the semiconductor clean room and equipment.
Can partition-less HEPA be used in pharmaceutical clean rooms?
The selection can be made based on the structure of the clean air conditioner and terminal air supply equipment. At the same time, the filtration efficiency, sealing method, materials and related project requirements need to be confirmed.
Are partitionless filters suitable for the electronics industry?
Can. Electronic manufacturing, precision assembly, display panels and other areas that require air particle control can choose corresponding filters based on actual needs.
Can barrier-free HEPA be used for EFU in semiconductor equipment?
Can. It needs to be matched according to the installation space of the EFU equipment, filter thickness, air volume, resistance and filtration efficiency.
HEPA installation should be carried out according to the airflow direction and installation drawing confirmed on site: first check the filter and frame, then clean the installation surface, press the seal evenly, and finally verify the air volume and seal under specified operating conditions.
When it is found that the HEPA installation direction is inconsistent with the product or box identification, the acceptance of this position should be suspended, the supplier's drawings and airflow arrows should be checked, and then adjusted according to the allowed installation method. Just because the filter fits into the frame doesn't mean the orientation is correct.
When purchasing HEPA, you should at least clarify the outer frame size, efficiency level and applicable standards, rated air volume, resistance, structure, sealing method, use environment and testing data requirements. The old filter element replacement project also requires installation frame and disassembly and assembly path information.
Differences in high-efficiency filter quotations may come from efficiency levels, filter materials, structural dimensions, resistance requirements, sealing methods, detection range and order quantity. When comparing prices, you should first confirm whether each quotation corresponds to the same technical conditions.
The installation quality of the liquid tank high-efficiency filter directly affects the sealing effect and cleanliness. Before installation, it is necessary to check that the appearance of the filter is not deformed or damaged, that the liquid tank is intact, and that the box knife edge is flat and free of burrs. During installation, pay attention to controlling the injection amount of sealant to 70%-80% of the depth of the liquid tank, and inject glue evenly and continuously along the periphery of the liquid tank. The filter must be vertically embedded in the knife edge and pushed into place; after installation, it is recommended to conduct a visual inspection, a PAO leak test and an initial resistance record. Common problems include sealant overflow (too much glue), insufficient sealant (too little glue), difficulty in pushing the filter (skew or size mismatch), and PAO leak detection frame leakage (insufficient insertion depth or missing glue). Aili industrial liquid tank high-efficiency filter is provided with polyurethane sealant and installation guidance materials, and the engineering technical team can provide installation technical guidance support.
The liquid tank high-efficiency filter and the ordinary non-partition high-efficiency filter belong to the non-partition filter category. The core difference lies in the frame structure and sealing method. The liquid tank filter frame has a liquid tank groove, and liquid sealant is injected to achieve sealing. The sealant flows and fills all irregular gaps. It has high long-term reliability and is suitable for ISO class 5 and above clean rooms. Ordinary filters without partitions are sealed by sealing tape extrusion, with a simple structure and low cost, and are suitable for ISO class 5 and below scenarios. The filtration area of the liquid tank filter of the same size is slightly smaller (about 5%-10% less), the price is higher, and the replacement operation is cleaner. When selecting, a comprehensive judgment must be made based on the cleanliness level, leak detection requirements, replacement frequency and budget. Aili Industrial produces two types of filters at the same time, with efficiency levels covering H13, H14 and U15-U17. Each unit has been tested and a test report has been issued.
The liquid tank high-efficiency filter and the ordinary non-partition high-efficiency filter belong to the non-partition filter category. The core difference lies in the frame structure and sealing method. The liquid tank filter frame has a liquid tank groove, and liquid sealant is injected to achieve sealing. The sealant flows and fills all irregular gaps. It has high long-term reliability and is suitable for ISO class 5 and above clean rooms. Ordinary filters without partitions are sealed by sealing tape extrusion, with a simple structure and low cost, and are suitable for ISO class 5 and below scenarios. The filtration area of the liquid tank filter of the same size is slightly smaller (about 5%-10% less), the price is higher, and the replacement operation is cleaner. When selecting, a comprehensive judgment must be made based on the cleanliness level, leak detection requirements, replacement frequency and budget. Aili Industrial produces two types of filters at the same time, with efficiency levels covering H13, H14 and U15-U17. Each unit has been tested and a test report has been issued.
V-type high-efficiency filters can reach H13 and H14 levels of EN1822:2009 standards. The total MPPS efficiency of H13 is ≥99.95%, and the local penetration rate is ≤0.25%; the total MPPS efficiency of H14 is ≥99.995%, and the local penetration rate is ≤0.025%. H13 is suitable for ISO7-8 clean rooms, electronic assembly, food processing and other scenarios; H14 is suitable for ISO5-6 clean rooms, pharmaceutical GMP, hospital operating rooms, semiconductor manufacturing and other key places. The V-shaped filter is designed with a V-shaped structure and can achieve large air volume carrying and controllable resistance in both H13 and H14 grades. When selecting, a comprehensive judgment must be made based on cleanliness level requirements, industry specifications and system air volume. Aili industrial V-type high-efficiency filters strictly comply with the EN1822 standard, and the efficiency levels cover H13 and H14. H14-level products are scanned and tested for leaks one by one, and test reports are provided.
The initial resistance is the pressure difference value of the new V-type high-efficiency filter under the rated air volume, in Pa, which is the basic parameter for selection, operation and maintenance. The initial resistance of V-type filter H13 grade is usually ≤200Pa, and the initial resistance of H14 grade is usually ≤250Pa. Under the same conditions, the resistance of H14 is slightly higher than H13. The initial resistance is used for fan head calculation and energy consumption assessment during selection, and is used as a basis for replacement judgment during operation - the final resistance is usually set to twice the initial resistance. When the actual measured initial resistance is high, it is necessary to check whether the actual air volume matches the rated air volume, and check whether the installation is standardized. Initial resistance is an important parameter affecting operating costs. Aili Industrial V-type high-efficiency filter is designed with low resistance. The initial resistance of H13 is ≤200Pa, and the initial resistance of H14 is ≤250Pa. Each unit has been tested for resistance and a test report has been issued.
V-type high-efficiency filters are suitable for both constant air volume (CAV) and variable air volume (VAV) HVAC systems. The air volume of the CAV system is constant and the working conditions are stable. The V-shaped filter can take advantage of low resistance and high efficiency when selected according to the designed air volume. The air volume of the VAV system is dynamically adjusted as the load changes. The V-shaped filter has a strong structure and good adaptability to wide wind speeds. The wind speed can reach 2.5m/s under the initial resistance condition of 250Pa, adapting to wind speed fluctuation conditions. When selecting the VAV system, the maximum design air volume should be used as the basis, and a 20%-30% fan pressure head margin should be reserved. It is also recommended to configure a differential pressure transmitter to monitor the resistance in real time. V-type filter efficiency grade (H13/H14) does not affect the adaptability of the air volume system. Aili Industrial V-type high-efficiency filter has a solid structure, rated air volume covering 2400-4200m³/h, and is suitable for CAV and VAV systems. Each unit has been scanned and tested for leaks one by one and a test report has been issued.
The selection of large air volume V-type high-efficiency filter requires comprehensive consideration of four core parameters: rated air volume, overall size, initial resistance and efficiency level. Common specifications include rated air volume covering 850-4200m³/h, external dimensions ranging from 287×592×292mm to 1220×610×292mm, and initial resistance as low as ≤200Pa. The selection steps include calculating the total air volume of the system, determining the air volume requirement of a single unit, selecting the overall dimensions according to the parameter table, checking the installation space (especially the depth direction, the standard is 292mm), selecting the efficiency level (H13 or H14), checking the initial resistance and evaluating the replacement cycle. It is recommended to reserve 10%-20% air volume margin when selecting a model to avoid neglecting the depth size, the impact of efficiency level on air volume, and the difference between initial resistance and final resistance. Aili Industrial provides a variety of dimensions and V-shaped configurations, with rated air volume covering 850-4200m³/h. It strictly complies with the EN1822 standard. Each unit has been scanned and tested for leaks one by one and a test report has been issued.
The V-type high-efficiency filter is arranged in a V-shape with multiple filter elements without partitions, which increases the filtration area to 3-5 times that of ordinary flat-plate filters under the same external dimensions. Its core principle is to expand the filter material from a two-dimensional plane to a three-dimensional space, making full use of the depth direction of the frame. The increased filtration area brings practical advantages such as low resistance (initial resistance can be as low as ≤200Pa), large air volume (rated air volume can reach 2400-4200m³/h), high dust holding capacity and reduced number of filters. V-type filters are suitable for large air volume scenarios in limited spaces such as the end of air-conditioning boxes, compact HVAC systems, return air ducts in clean factories, and upgrades of existing systems. When selecting, you need to confirm the installation depth, select a V-shaped configuration according to the air volume, and check the system resistance. Aili industrial V-type high-efficiency filters strictly comply with the EN1822 standard and are available in 3V, 4V, and 5V specifications. Each unit has been scanned and tested for leaks one by one and a test report has been issued.
V-Bank high-efficiency filter (V-type combined high-efficiency filter) uses multiple filter elements without partitions to form a V-shaped structure. The rated air volume can reach 2400-4200m³/h. It is suitable for constant air volume (CAV) and variable air volume (VAV) HVAC systems. Typical application scenarios include hospital operating rooms and ICUs, pharmaceutical GMP workshops, electronic and semiconductor clean workshops, food processing plants, data centers, hotels and schools and other commercial buildings, as well as industrial ventilation facilities such as power plants. V-Bank filters can be used as high-efficiency filtration or ULPA pre-protection at the end of air conditioning boxes in HVAC systems. They have technical advantages such as large air volume carrying capacity, low operating resistance, high dust holding capacity, and saving installation space. Aili Industrial V-Bank high-efficiency filters strictly comply with EN1822 standards, with efficiency levels covering H13 and H14, adapting to the needs of various HVAC air treatment systems. Each unit has been scanned and tested for leaks one by one and a test report has been issued.
The V-type partitionless high-efficiency filter uses multiple partition-less filter elements to form a V-shaped structure. The filtration area can reach 3-5 times that of ordinary filters, the rated air volume can reach 2400-4200m³/h, and the initial resistance can be as low as ≤200Pa. In large air volume systems, compared with ordinary high-efficiency filters, V-type filters have the advantages of reducing the number of filters, saving installation space, reducing installation costs, reducing operating energy consumption, and extending the replacement cycle. The efficiency level covers H13 and H14, and is suitable for large air volume scenarios such as terminal filtration of air-conditioning boxes, electronic semiconductors, pharmaceuticals and medical care, and power plants. When selecting, you need to pay attention to parameters such as rated air volume, initial resistance, efficiency level, and overall dimensions. Aili Industrial V-type partitionless high-efficiency filter strictly complies with the EN1822 standard and provides large air volume design, low resistance and high dust holding capacity, optional multi-material frames and unit-by-unit inspection services.
The V-type high-efficiency filter (V-Bank) uses multiple filter elements without partitions to form a V-shaped structure. The filtration area can reach 3-5 times that of ordinary filters. The designed air volume is more than 2 times higher than that of high-efficiency filters with partitions. The initial resistance can be as low as ≤200Pa. Compared with ordinary high-efficiency filters, V-type filters require fewer installations, smaller installation space, lower operating resistance, higher dust holding capacity and longer service life under the same air volume. The efficiency level covers H13 and H14, and is mainly used in scenarios such as terminal filtration of air-conditioning boxes, large air volume HVAC systems, electronic semiconductors, pharmaceuticals, medical and power plants. Aili industrial V-type high-efficiency filters strictly comply with the EN1822 standard, provide multiple specifications and are tested one by one, and support customized production.
The thickness (50mm, 70mm, 90mm, 120mm) and filter area of the high-efficiency filter without partitions directly affect the air volume carrying capacity, initial pressure difference, dust holding capacity and service life. 70mm is the standard configuration of FFU, which strikes a balance between space occupation and performance; 90mm and 120mm are suitable for equipment with ample space such as air-conditioning boxes, with larger filter area and longer replacement cycle. When selecting, a comprehensive judgment must be made based on the size of the installation space, system air volume, fan head margin and full life cycle cost. If space allows, choosing a thicker filter, lower energy consumption and longer replacement intervals can usually pay back the cost difference within 1-2 years. Aili Industrial provides multiple thickness specifications of 50-120mm and non-standard customization services. Each unit is scanned and tested for leaks one by one and a test report is issued. The engineering and technical team can assist in air volume calculation and resistance calculation.
The partition-less high-efficiency filter uses ultra-fine glass fiber filter paper and hot-melt adhesive line separation technology, and can cover the full range of efficiency levels of H13, H14 and ULPA U15, U16, and U17. According to the EN1822 standard, H13 efficiency ≥ 99.95%, H14 ≥ 99.995%, U15 ≥ 99.9995%, U16 ≥ 99.99995%, U17 ≥ 99.999995%. Different levels correspond to different cleanliness requirements - H13 is suitable for ISO 7-8 clean rooms, H14 is suitable for ISO 5-6 clean rooms, and the local penetration rates of H13 and H14 differ by ten times. ULPA conducts efficiency assessments in the particle size range of 0.1-0.2μm and is suitable for high cleanliness environments of ISO level 4 and above. When selecting a model, a comprehensive balance must be made based on the cleanliness level, industry standards, system air volume and budget. Aili Industrial has independent production capabilities throughout the industry chain and strictly follows the EN1822 standard. Each filter is scanned and tested for leaks one by one and a test report is provided. It supports full series customization of H13, H14 and U15-U17.
When the installation space of FFU, EFU, clean shed or other clean equipment is limited, high-efficiency filters without partitions can be considered. The partition-less structure uses glue lines to fix the fold distance of the filter material, and has a certain design space in terms of filter thickness, filter area and internal structure. The actual selection should not only focus on the thickness of the filter, but also need to comprehensively consider the filtration efficiency, target air volume, initial resistance, fan static pressure, sealing method and later replacement space. Aili Industry can match the specifications of high-efficiency filters without partitions based on the equipment installation dimensions and operating parameters.
Partitionless high-efficiency filters can be used in clean environments such as semiconductors, electronic manufacturing, photovoltaics, pharmaceuticals, laboratories and precision manufacturing according to different specifications, and are often used in conjunction with FFU, EFU, clean sheds and clean room terminal air supply equipment. Different applications have different requirements for filtration efficiency, air volume, resistance, size, thickness and sealing methods, so selection needs to be based on specific equipment and clean environments. Aili Industry can match the specifications of high-efficiency filters without partitions based on industry applications, equipment structures and project parameters.
High-efficiency filters without partitions usually adopt filter material folding, glue line separation and outer frame sealing structure, without using traditional paper partitions or aluminum partitions. Its specifications mainly include overall dimensions, thickness, filtration efficiency, air volume, initial resistance, outer frame material and sealing method, etc. When used in FFU, EFU, clean sheds and clean room terminal air supply equipment, it needs to be matched based on the installation space, fan performance and target air volume. Aili Industry can provide corresponding specifications and configurations of high-efficiency filters without partitions based on equipment size, air volume, filtration efficiency and usage environment.
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.
