What is the main difference between a high-efficiency filter without partitions and a filter with partitions?
Both high-efficiency filters with partitions and high-efficiency filters without partitions can be used for high-efficiency air filtration, but there are differences between the two in terms of filter material structure, filter area, product thickness, air volume characteristics, installation space, and application methods .
Simply put:
Filters with partitions separate and support the filter material through partitions; filters without partitions usually use hot melt glue or glue lines to form the fold distance of the filter material, without using traditional separation partitions.
Therefore, there is no simple substitution relationship between the two structures, but the choice needs to be based on the equipment structure, air volume and cleanliness requirements.
1. Different filter material structures
The high-efficiency filter with partitions is equipped with a partition structure inside so that the filter materials are arranged according to a certain fold distance.
This structure can form a larger filtration area and is suitable for filters of different sizes and air volume requirements.
High-efficiency filters without partitions usually use hot melt glue to fix the fold distance of the filter material, and do not use traditional paper partitions or aluminum partitions.
Therefore, there are obvious differences in the appearance and internal structure of the two filters.
2. The filter area and product structure are different
The effective filtration area of the filter is related to the length of the filter material, the fold distance and the filter structure.
The partition structure controls the distance between filter media through partitions, and has a mature structural application in larger size filters.
The partition-less structure can form a larger filtering area by optimizing the fold distance of the filter material and the internal space of the filter, and at the same time facilitates compact structural design.
Therefore, when the installation space is limited, the partition-less structure is usually easier to achieve thin and compact design.
3. Application equipment is different
High-efficiency filters with partitions are commonly found in:
air handling unit
Clean air conditioning system
Clean room air supply system
High efficiency filter box
Medical and laboratory air treatment equipment
High-efficiency filters without partitions are common in:
FFU fan filter unit
EFU fan filter unit
Clean shed
Clean workbench
Laminar flow air supply equipment
Clean room terminal air supply system
However, the actual application is not absolutely fixed, and ultimately it still needs to be selected based on the equipment structure and project requirements.
4. Thickness and installation space need to be considered.
If the internal space of the equipment is sufficient, a high-efficiency filter with a corresponding structure can be selected based on the air volume and filtration efficiency.
If the equipment has obvious height restrictions, you need to focus on the filter thickness.
Especially in FFU, EFU and clean room ceiling end air supply equipment , the thickness of the filter will directly affect the overall height of the equipment.
Therefore, ultra-thin equipment usually requires comprehensive design from aspects such as partition-less structure, filter material fold distance and filter area.
5. Air volume and resistance also need to be compared together
The air volume and resistance of the filter cannot be judged only by 'with partitions' or 'without partitions'.
Actual performance is also affected by the following factors:
parameter
Influencing factors
Filtration efficiency
Filter material performance and filtration grade
Rated air volume
Filtration area, face velocity and structure
initial resistance
Filter material, filter area, wind speed, etc.
Service life
Inlet air dust content and operating conditions
Product size
Effective filter area and installation space
Sealing method
Connection structure between filter and box
Therefore, in actual projects, a comprehensive judgment should be made based on the system design air volume and allowable resistance.
3. Comparison of selection of high-efficiency filters with and without partitions
Compare items
High efficiency filter with partition
High efficiency filter without partition
internal structure
Set up dividers
No traditional partitions are used
Filter material fixed
Partition control fold distance
Glue line controls fold distance
Structural features
Mature structure, suitable for various specifications
Compact structure, easy to reduce thickness
Common applications
Air conditioning box, clean air conditioner, filter box
FFU, EFU, clean shed, etc.
space requirements
Determine according to specifications
Suitable for some devices with limited space
Air volume selection
Determined based on filter area and face wind speed
Determined based on filter area and face wind speed
Sealing method
Corresponding sealing structure can be configured
Corresponding sealing structure can be configured
Selection basis
Size, air volume, efficiency, resistance
Size, air volume, efficiency, resistance
4. Under what circumstances should we choose a high-efficiency filter with partitions?
If the filter is mainly installed in an air conditioning box, a clean air conditioning system, a large air treatment equipment or a high-efficiency filter box , priority can be given to considering a partitioned high-efficiency filter based on the equipment structure.
Especially for projects where the equipment has reserved space for standard filter installation, it is necessary to first confirm the existing filter specifications, and then match them based on the system air volume and filtration efficiency.
5. Under what circumstances should we choose a high-efficiency filter without partitions?
If the product is installed in an FFU, EFU, clean shed or other terminal air supply equipment with limited space , you can focus on considering high-efficiency filters without partitions.
For clean environments such as semiconductor and electronic manufacturing, it is necessary to further confirm the equipment height, target air volume, filtration efficiency and clean room design requirements.
6. How does Aili Industry select high-efficiency filters?
Aili Industrial has the R&D and production capabilities for clean air treatment equipment and filtration products, and can match filter specifications according to customers' actual equipment conditions.
Customers can provide the following information:
Equipment type + installation size + system air volume + filtration efficiency + usage environment
For example:
FFU equipment, size is ××, target air volume is ××, and H14 filtration efficiency is required.
Based on these basic conditions, the structure, size, filtration area and corresponding performance parameters of the filter can be further determined.
Aili Industrial also produces FFU, EFU and other clean equipment, so in terms of matching filters, fans, and equipment structures, selection can be made from the perspective of the entire machine system.
7. Frequently Asked Questions
Which high-efficiency filter is better, with or without partitions?
The applicable scenarios of the two structures are different and cannot be judged based on the structure alone. It should be selected according to the installation space, air volume, filtration efficiency, resistance and equipment form.
Can filters without partitions be used only for FFU?
no. Partitionless high-efficiency filters can also be used in clean booths, clean workbenches, laminar flow equipment and other clean air treatment systems.
Are there partition filters that can be used with FFU?
It needs to be judged based on the internal structure and installation space of the FFU. If the equipment structure permits, filters with partitions of corresponding specifications can be used.
Are the filtration efficiency of filters with and without partitions the same?
Filtration efficiency is mainly related to the filter material and product design, and cannot be judged solely by whether there are partitions. Specific efficiency levels should be subject to product testing and project requirements.
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 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 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.
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.
