1. What are the common structures and specifications of high-efficiency filters without partitions?
High-efficiency filters without partitions usually adopt a structure of filter material folding + glue line separation + outer frame sealing , without using traditional paper partitions or aluminum partitions.
Since there is no fixed partition structure restriction, the partition-less high-efficiency filter can be designed according to the installation space, air volume and filtration efficiency requirements of different equipment.
Actual product specifications usually need to be confirmed from the following dimensions:
Filter size, thickness, filtration efficiency, air volume, initial resistance, filter material type, outer frame material and sealing method.
2. Basic structure of high-efficiency filter without partitions
A conventional high-efficiency filter without partitions mainly consists of the following parts:
structure
Main function
High efficiency filter material
Filter particulate matter in the air
glue line
Fixed filter media fold distance
outer frame
Support the overall structure of the filter
sealant
Secures the filter media and creates a seal
gasket
Forms a seal against the equipment mounting surface
protective net
Provide structural protection for filter media
According to different usage environments, the material and structure of the filter can also be adjusted.
3. Common specifications of high-efficiency filters without partitions
1. Overall dimensions
The overall dimensions are mainly determined by the equipment installation space.
Common parameters include:
Length × Width × Thickness
If used for FFU, EFU and other equipment, the size needs to be determined according to the filter installation frame inside the equipment.
For air conditioning boxes and clean air supply equipment, the design needs to be combined with the filter installation section inside the equipment.
2. Filter thickness
Filter thickness affects the overall structure and internal space of the device.
For ordinary air treatment equipment, you can choose according to the filter area and air volume.
For compact equipment such as FFU and EFU, it is important to consider the relationship between the filter thickness and the overall height of the equipment.
If the equipment has clear restrictions on height, it can be matched by adjusting the fold distance of the filter material, filter area and structure.
3. Filtration efficiency
The partitionless high-efficiency filter can be configured with corresponding filtration efficiency levels according to project requirements.
Common high-efficiency filter applications involve:
H13
H14
For applications with higher cleanliness requirements, ULPA grade filters can also be configured according to the product structure.
The specific efficiency level needs to be determined based on project standards, cleanliness levels and actual air cleanliness requirements.
4. Air volume of high-efficiency filter without partitions
Filter air volume is not a fixed value, but is related to the following factors:
filter size
Effective filter area
Filter material performance
face wind speed
Filtration efficiency
initial resistance
Use equipment
Filters of the same size may have different actual air volumes under different operating conditions.
Therefore, when purchasing a high-efficiency filter without partitions, it is recommended to provide both the size and the target air volume , instead of only providing the filter frame size.
5. Initial resistance of filter without partitions
Initial resistance is one of the important parameters in the selection of high-efficiency filters.
When air passes through the filter, it will produce a certain resistance. The structure, filter material, filter area and operating wind speed of the filter will all affect the resistance.
For FFU and EFU, filter resistance needs to be considered in conjunction with fan performance.
If the filter resistance is high and the fan's static pressure capacity is insufficient, the actual air supply volume may not reach the system design value.
Therefore, during the equipment selection stage, the following should be carried out:
Fan + filter + air volume
overall match.
6. What are the options for filter frames without partitions?
The high-efficiency filter without partitions can choose the corresponding outer frame material according to different applications.
Common frames include:
Frame type
Common applications
Aluminum alloy frame
Clean room, FFU, etc.
Galvanized steel frame
air handling equipment
Stainless steel frame
Environments that require material corrosion resistance
Other customized frames
Special Equipment and Projects
Specific materials need to be determined based on the equipment structure, use environment and project requirements.
7. Sealing method of filter without partition
The partitionless high-efficiency filter can adopt different sealing forms according to the installation method.
Common ways include:
gasket seal
Glue seal
Liquid tank sealing structure
Other customized connection methods
For example, in some clean room terminal air supply systems, it is necessary to focus on the sealing between the filter and the box.
If the performance of the filter itself meets the requirements, but there is air leakage in the installation location, it will also affect the actual filtration effect.
Therefore, the sealing of both the filter body and the mounting system requires attention.
8. How to choose the specifications of non-partition filter for different equipment?
Application equipment
Focus on parameters
FFU
Size, thickness, air volume, resistance, efficiency
EFU
Size, thickness, fan static pressure, efficiency
Clean shed
Air volume, size, efficiency, sealing
Clean workbench
Air volume, filtration efficiency, installation space
air handling equipment
Size, air volume, resistance, filtration efficiency
Clean room end
Size, sealing method, efficiency
Semiconductor related equipment
Size, thickness, air volume, filtration efficiency
9. Can high-efficiency filters without partitions be customized?
Can.
The filter size in actual projects is not necessarily configured exactly according to a single standard specification.
If the equipment has special size, installation space or air volume requirements, it can be designed accordingly according to the equipment structure.
Common customization projects include:
Frame size
filter thickness
Filtration efficiency
Filter media type
Frame material
Sealing method
filter area
Air volume requirements
Therefore, if the specific model is not determined when purchasing, you can also directly provide the equipment installation dimensions and usage requirements for selection.
Aili Industry has the R&D and production capabilities of filters, FFU, EFU and clean air treatment equipment.
In the application of high-efficiency filters without partitions, the filter size, thickness, filtration efficiency, air volume and sealing structure can be matched according to the installation conditions of different equipment.
If used for FFU or EFU, the filter can also the fan, motor and control system .be considered as a whole with
Customers can provide the following basic information:
Equipment name + installation size + target air volume + filtration efficiency + usage environment
Aili Industrial can further determine the corresponding filter specifications based on these parameters.
11. Frequently Asked Questions
Is there only one specification for high-efficiency filters without partitions?
no. High-efficiency filters without partitions can be configured in different specifications according to equipment size, filtration efficiency, air volume, thickness and usage environment.
Can high-efficiency filters without partitions be made in different thicknesses?
Can. The filter thickness can be designed based on the equipment installation space and filtering area, and the specific size needs to be determined based on the actual structure.
Can a stainless steel frame be used for filters without baffles?
Can. For applications that have special requirements for material corrosion resistance or cleanliness requirements, the corresponding outer frame material can be selected according to project needs.
Can filters without baffles be used with H14?
It can be configured accordingly according to the filter material and product structure. Actual efficiency levels should be determined based on project requirements and product testing data.
Can the size of the baffleless filter be customized?
Can. For FFU, EFU, clean shed and other non-standard equipment, specifications can be matched according to the actual installation space.
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 model, 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 model, 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 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 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.
