1. When space is limited, can a high-efficiency filter without partitions be considered?
Can.
When the internal space of the clean equipment, FFU, EFU or terminal air supply device is limited, high-efficiency filters without partitions can be used as a structural option.
Compared with traditional high-efficiency filters with partitions, partition-less filters do not use paper partitions or aluminum partitions. Instead, they use glue lines to fix the fold distance of the filter material, which can reduce the space occupied by some internal structures.
However, whether the filter is suitable for a certain space cannot only look at the 'thinness' aspect , but also needs to consider the filter area, air volume, resistance, filtration efficiency and equipment structure.
2. Why is the partition-less structure suitable for some space-constrained equipment?
High-efficiency filters without partitions usually adopt a folding structure of the filter material, and the fold distance of the filter material is controlled by glue lines.
This structure can adjust the filter material fold distance and filter area according to the product thickness requirements, thereby providing a certain design space for compact equipment.
Especially in the following equipment, filter thickness needs to be considered:
FFU fan filter unit
EFU fan filter unit
Clean shed
Clean workbench
Local clean air supply equipment
Some semiconductor equipment equipped with clean devices
These devices often require fans, filters, control components and other structures to be placed simultaneously within a limited height, so the size of the filter will directly affect the design of the entire machine.
3. Is a thinner filter more suitable for equipment with limited space?
no.
Filter thickness is only one factor in selection.
If you simply reduce the thickness of the filter, you may need to reconsider the fold distance of the filter material, filter area, surface wind speed and system resistance.
For example:
The filter becomes thinner → the internal filtration area may change → the air volume and resistance need to be rechecked → the fan operating point also needs to match.
Therefore, a truly reasonable thin design should find a suitable matching relationship between equipment space, filter area, air volume and resistance.
4. What parameters do you need to focus on when space is limited?
It is recommended to focus on confirming the following parameters:
parameter
Why you need to pay attention
filter thickness
Affects the overall height of the device
Length and width dimensions
Determine if installation matches
filter area
Affects air volume and resistance
Filtration efficiency
Meet cleanliness requirements
Rated air volume
Match the equipment design air volume
initial resistance
Match the fan static pressure
Sealing method
Affects the sealing of the filter after installation
replacement space
Affect later maintenance
Among them, thickness, filter area and resistance usually need to be considered together.
5. How to choose FFU device when space is limited?
FFU is usually installed on the ceiling of a clean room or in a clean air supply area.
The equipment needs to accommodate fans, filters and control components, so the overall height of the equipment needs to be controlled.
If the project has clear requirements for the FFU height, after determining the target air volume and filtration efficiency, a high-efficiency filter without partitions of appropriate thickness can be selected based on the equipment structure.
It is recommended to confirm at the same time when selecting:
FFU overall size + filter size + equipment height + target air volume + filtration efficiency + fan static pressure
This can avoid only determining the filter thickness and then discovering that the air volume or fan parameters do not match.
6. Why does EFU equipment need to pay more attention to filter thickness?
Some EFUs are used in semiconductor equipment, electronic manufacturing equipment or local clean environments.
Such equipment may require structural integration with production equipment, so the installation space may be limited by the height of the equipment and surrounding structures.
In this case, filter thickness becomes an important parameter in EFU design.
For example:
The installation height of the equipment is limited ↓ The overall thickness of the EFU needs to be controlled ↓ The appropriate filter structure needs to be selected ↓ The filter area and target air volume must be ensured at the same time ↓ The fan must be matched according to the filter resistance
This is also the reason why high-efficiency filters without partitions have application value in some EFU equipment.
7. How to take into account the filtering area in a structure without partitions?
When the external size of the filter is limited, the filter material needs to be folded to form an effective filtering area.
The partition-less structure usually uses glue lines to fix the fold distance of the filter material.
By adjusting:
Filter media fold distance
Filter length
filter thickness
Effective filter area
The internal structure of the filter can be designed.
However, the larger the filtration area, the better. It also needs to be comprehensively matched with the filter resistance and target air volume.
8. How to avoid excessive filter resistance when space is limited?
Filter resistance is related to factors such as filter material performance, filter area, surface wind speed, and filter structure.
In the case of limited equipment space, if the filter area is limited and the system still requires a large air volume, it is necessary to focus on checking the working wind speed and resistance of the filter.
Matching can usually be done from the following directions:
Increase effective filtration area
By rationally designing the fold distance of the filter material and the filter area, a more sufficient filter channel is provided for the air flow.
Optimize filter size
Increase the filter size within the limits allowed by the equipment.
Match fan performance
Select the appropriate fan working point based on the actual resistance of the filter.
Adjust system air volume
If the project allows, the actual operating air volume can be reasonably determined based on the clean room design requirements.
9. Which partitionless filters are suitable for clean equipment with limited space?
The high-efficiency filter without partitions can be configured according to the specifications of different equipment.
equipment
Main factors of concern
FFU
Thickness, air volume, resistance, efficiency
EFU
Thickness, equipment height, fan static pressure
Clean shed
Size, air volume, filtration efficiency
Clean workbench
Filtration area, air volume, installation space
Local cleaning equipment
Size, air volume, filtration efficiency
Semiconductor equipment
Thickness, size, air volume, cleanliness requirements
The specific model needs to be determined according to the equipment structure.
10. Can high-efficiency filters without partitions be designed in a thin shape?
Design can be carried out according to product structure and equipment requirements.
Thin designs often do not simply reduce the filter thickness, but require re-matching:
Filter material + fold distance + filter area + air volume + resistance + outer frame structure
If the customer has clear equipment height restrictions, the internal space or installation dimensions of the equipment can be provided, and the manufacturer will match the specifications based on actual conditions.
For equipment such as FFU and EFU, the internal space occupied by the fan and control system also needs to be considered.
11. Do you still need to consider filter replacement when space is limited?
need.
After the filter is installed, subsequent maintenance and replacement need to be considered.
If the internal space of the equipment is very tight and the filter replacement path is not designed in advance, subsequent maintenance may be affected.
Therefore, in the product design stage, in addition to considering:
'Can it be installed'
You should also consider:
'Can it be replaced and maintained normally in the future?'
Especially for filters installed on the ceiling of clean rooms, on top of equipment, or around production equipment, maintenance methods need to be determined in advance.
12. Aili industrial partitionless high-efficiency filter and space-limited equipment
Aili Industrial can match the specifications of the high-efficiency filter without partitions according to the actual installation space of the clean equipment.
If the customer has equipment height restrictions, they can provide:
Overall device size
Filter installation dimensions
Maximum thickness allowed
Target air volume
Filtration efficiency
Fan parameters
Usage environment
Aili Industry can comprehensively consider filters, fans and equipment structures.
For integrated clean equipment such as FFU and EFU, the matching between the filter and the fan can also be considered from the perspective of the whole machine.
Is it necessary to choose a filter without partitions if the space is relatively small?
uncertain. A comprehensive judgment needs to be made based on the equipment structure, air volume, filtration efficiency and filter thickness. The partition-less structure is only a solution that can be considered when space is limited.
Can high-efficiency filters without partitions be made into ultra-thin specifications?
The design can be carried out according to the installation space of the equipment, but the filter area, air volume and resistance need to be checked at the same time, and the thickness cannot be reduced only.
How should I choose a filter if the FFU height is limited?
First determine the maximum height allowed by the equipment, then determine the filter installation size, target air volume and filtration efficiency, and then match it based on filter thickness and resistance.
Is EFU suitable for thin-type partitionless HEPA?
Can be configured according to the EFU device structure. For applications where equipment height is limited, filter thickness, air volume, resistance and fan static pressure need to be confirmed at the same time.
Will the thinner the filter, the more space-saving the device will be?
It is usually possible to reduce the height occupied by the filter itself, but the overall space is also affected by the fan, control components and other structures, so an overall design is required.
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 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 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 too high, you need 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 20%-30% of the 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 air volume system adaptability. 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 the model, you need to confirm the installation depth, select the 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.
