How to choose ULPA for large air volume system? Low resistance and number of modules trade-off

Large air volume system selectionFor ULPA filters , it is necessary to compare the single unit area, rated air volume, resistance and module number, and consider the fan and flow equalization conditions. Reducing modules does not necessarily reduce overall cost or operating resistance. The selection contradiction of a large air volume system is very typical: with fewer modules, the single unit area needs to be larger, the resistance may increase, and the fan needs to be stronger; with more modules, joints and compression points increase, the installation and maintenance workload increases, and the flow equalization design becomes more complicated. There are costs in both directions, and the basis for the choice is not 'which one looks more economical', but the comparison of total resistance, operating energy consumption and maintenance costs under the same working conditions. Aili Industrial’s product line coverageBox-type high-efficiency filter with partitions、Large air volume box type high efficiency filter、There are various large air volume structural forms such as large air volume V-shaped high-efficiency filter without partitions , and the module solution can be matched according to the system air volume and installation space.

1. Compare plans under the same working conditions: unify the total air volume and protection range first

Unify the total air volume and protection range of each plan, and then compare the filter element curve, size and system pressure to avoid sorting data with different rated conditions.

The most common mistake to make when comparing large air volume plans is to compare the rated air volume of Plan A with the resistance at another air volume point of Plan B. The test conditions of the two data are different, and the comparison results are meaningless. Aili Industry isWhen comparing HEPA/ULPA filter solutions, the resistance and efficiency data of each structure are provided according to the same target air volume and system resistance.Large air volume V-shaped high-efficiency filter without partitions andThe data of large air volume box-type high-efficiency filters are listed in the same caliber to facilitate horizontal comparison. The relationship between levels and filtering requirements can be found inISO cleanliness level comparison。

2. Check air distribution and maintenance: For large-size and small-module solutions, check the support and leak detection space

Large-size or few-module solutions require verification of support, scanning, and handling space; multi-module solutions require management of joints, compression, and air volume distribution.

Large-size modules reduce the number of joints, but the weight and size of a single unit increase, the support requirements for the ceiling or box increase, and it is more difficult to transport and access the filter when replacing it. The multi-module solution is flexible to install, but the seams and compression points between modules increase, and each seam needs to be sealed and leak-detected. Aili Industry isBox-type high-efficiency filter with partitions andThe structural design of the large air volume box-type high-efficiency filter determines the support method according to size and weight. The multi-module solution can be designed according to standardized interfaces to reduce the complexity of joint management. To check the air distribution and maintenance space, please refer toHEPA FAQs and Selection Guide。

3. Evaluate the operation stage at the same time: initial resistance is only part of

Considering air volume maintenance, control margin, element replacement shutdown and spare parts standardization after dust accumulation, you cannot just compare the initial resistance of the new filter element.

The initial resistance of the new filter element is only the starting point of the operating cycle. The long running time of large air volume systems, the high cost of filter replacement, the ability to maintain air volume under the final resistance state, the downtime during replacement, and the degree of standardization of spare parts supply will all affect the full cycle cost. Aili Industry isThe FFU fan filter unit is equipped with EC DC speed adjustment. When the resistance rises, the air volume can be maintained through speed adjustment.The FFU computer group control system can record zone air volume and resistance trends to facilitate evaluation of actual performance during the operation phase. The relationship between filter resistance and operating cycle can be found inULPA ultra-high efficiency filter FAQ and selection guide。

4. Large air volume does not mean that a larger fan must be used. Check the system resistance distribution first.

Does large air volume require a larger fan? The system resistance and area plan should be checked first, and then the working point should be matched. It cannot be judged just by the name of the air volume.

The total resistance of the system is composed of filters, air ducts, pre-filtration and other components, of which filter resistance only accounts for part. Increasing the filtration area and reducing the surface wind speed can reduce the filter resistance, but it will increase the volume and cost; reducing the area will reduce the volume, but the resistance will increase and the fan load will increase. Aili Industry isIn the non-standard ULPA filter large air volume project, check the filter area and fan working point according to the total system resistance and target air volume.The structure of the large air volume V-shaped high-efficiency filter without partitions provides a large filtering area in a limited space, and can find a balance between area and resistance. The relationship between fan matching and system resistance can be referred toFFU FAQ and technical support。

5. Related questions and answers

Does large air volume require a larger fan?
The system resistance and area plan should be checked first, and then the working point should be matched. It cannot be judged just by the name of the air volume.

Can reducing the number of modules reduce overall costs?
uncertain. Reducing modules may reduce the installation workload, but the size and weight of a single unit will increase, and support and replacement costs may rise, which requires comprehensive accounting.

What should I do if the filter replacement of a large air volume system takes a long time?
Zone replacement or spare module options can be considered during the design phase, combined with operational data and maintenance schedules.

6. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

Large air volume V-shaped high-efficiency filter without partitions

Large air volume box type high efficiency filter

HEPA FAQs and Selection Guide

7. Key points for selection and acceptance inspection

8. Product matching and technical support from Aili Industrial

Aili Industrial’s product line coverageBox-type high-efficiency filter with partitions、Large air volume box type high efficiency filter、There are various large air volume structural forms such as large air volume V-shaped high-efficiency filter without partitions , and the module solution can be matched according to the system air volume and installation space. When comparing plans, the resistance and efficiency data of each structure are provided based on the same target air volume and system resistance.The FFU fan filter unit supports EC DC speed regulation, which can maintain the air volume after the resistance rises.The FFU computer group control system records zone air volume and resistance trends to facilitate evaluation of operating performance.Non-standard ULPA filter large air volume project checks the filter area and fan working point according to the total system resistance and target air volume.Box-type high-efficiency filter with partitions andThe support method of the large air volume box-type high-efficiency filter is determined according to the size and weight. Provide process objectives, installation drawings, operating conditions and acceptance requirements for further communicationULPA ultra-high efficiency filters . Standard specifications, non-standard interfaces, samples and batch matching of The specific parameters and test range are based on the confirmed model and technical documents.