Analysis of Core Application Scenarios of Ultra-Low Resistance High and Medium Efficiency Filtration Units (F7-F9 grades
The ultra-low resistance high and medium efficiency filtration unit features “low initial resistance (≤60Pa), high filtration efficiency (80%-95%@0.4μm), low energy consumption, and long service life” as its core advantages. Its application scenarios focus on air purification systems that have clear requirements for purification efficiency and attach importance to system energy consumption, operation and maintenance costs, and air volume stability. It covers multiple fields such as industrial cleanliness, commercial buildings, medical and health care, and rail transit. The specific scenarios and adaptation logics are as follows:
I. Industrial Clean Field: The core choice for efficient purification and energy-saving operation and maintenance
Industrial scenarios have strict requirements for controlling air particulate matter (to avoid product contamination and equipment wear), and the system operates continuously for a long time. The ultra-low resistance feature can significantly reduce energy consumption and replacement costs, making it an ideal solution for medium and high-end industrial cleanliness.
Pre-treatment/intermediate filtration section of clean workshop
Applicable scenarios: Clean workshops in electronic semiconductors (chips, PCB boards), precision machinery manufacturing, automotive painting, photoelectric display (LCD/OLED), new energy (battery materials, photovoltaic modules), etc. (ISO 7-8 grade, 10,000 grade – 100,000 grade).
Core value: As a pre-treatment unit for high-efficiency filters (HEPA/ULPA), it intercepts over 80% of large particle contaminants (above 0.4μm), reduces the clogging pressure on high-efficiency filters, and extends their service life by 30% to 50%. The low-resistance feature reduces the energy consumption of the air conditioning unit fan, especially suitable for large clean workshops (with ventilation volume reaching tens of thousands of m³/h), and the annual electricity cost can be reduced by 10% to 20%.
Supporting equipment: Central air conditioning purification system, combined air handling unit (AHU), clean supply air ducts.
FFU (Fan Filter Unit) matching
Suitable scenarios: Ceiling-mounted FFU systems for electronic cleanrooms and biological cleanrooms (requiring dense layout, with up to hundreds of units in a single workshop).
Core value: The FFU fan has a limited air pressure. The ultra-low resistance filter unit (initial resistance ≤50Pa) can prevent air volume attenuation caused by excessive resistance (conventional high and medium efficiency filters can easily cause FFU air volume to drop by 15%-20%). At the same time, it reduces the operating noise of the FFU (lessens the load on the fan), and the long service life feature reduces the frequency of FFU filter element replacement (lowers the operation and maintenance costs for high-altitude operations).
Pre-treatment of industrial waste gas
Applicable scenarios: Exhaust gas purification systems for welding workshops, grinding workshops, and chemical raw material workshops (dust particles need to be intercepted first before subsequent exhaust gas treatment is carried out).
Core value: The low-resistance design ensures smooth flow of exhaust gas (avoiding system pressure build-up), and the high and medium-efficiency filtration can intercept welding fumes, metal dust and other particles (avoiding clogging of subsequent activated carbon adsorption devices or catalytic combustion equipment), enhancing the overall stability of the exhaust gas treatment system.
Ii. Commercial and Public Buildings: A balanced solution of comfortable purification and low energy consumption
The air conditioning systems of commercial buildings (office buildings, shopping malls) and public Spaces (airports, subways) need to take into account “air purification effect, operating energy consumption and user experience”. Ultra-low resistance medium and high efficiency filter units can be perfectly adapted
Central air conditioning fresh air system
Applicable scenarios: Centralized fresh air systems for Grade A office buildings, high-end shopping malls, hotels, and government office buildings (must meet the indoor air quality standard GB/T 18883-2002, PM2.5 removal rate ≥80%).
Core value: The low-resistance feature reduces the energy consumption of central air conditioning fans (the annual operation time of the fresh air system in large office buildings exceeds 8,000 hours, and low-resistance products can save more than 30% of energy consumption). The high and medium efficiency filtration effectively blocks outdoor PM2.5, pollen and dust, improving indoor air quality. At the same time, it avoids insufficient fresh air volume due to excessive resistance (ensuring the oxygen content in the room).
Ventilation system for rail transit
Adapted scenarios: Ventilation and air conditioning systems in subway stations, high-speed railway stations, and airport terminals (with large foot traffic, high pollutant concentration, and the system needs to operate 24 hours a day).
Core values: High dust holding capacity + low resistance design, capable of handling high-flow and highly polluted environments (such as dust in subway tunnels and particulate matter carried by passengers), slow resistance growth, and long service life (reducing the labor cost of frequent replacement). At the same time, it meets the purification efficiency requirements of public Spaces (PM2.5 removal rate ≥85%) to ensure the respiratory health of passengers.
Ventilation and purification for large venues
Suitable scenarios: Stadiums, exhibition centers, theaters and other crowded places (requiring rapid ventilation and ensuring clean air).
Core values: The low resistance feature ensures that the ventilation system can provide sufficient air volume (meeting the ventilation needs during crowded times), and the high and medium efficiency filtration intercepts particulate matter, droplet nuclei, etc. carried by the crowd, reducing the risk of cross-contamination. At the same time, it reduces the noise of the fan operation and enhances the comfort of the venue.
Iii. Medical and health Sector: Cleanliness, safety, stability and reliability are the key guarantees
The medical scenario has extremely high requirements for the “efficiency stability and low pollution risk” of air purification. Ultra-low resistance and high efficiency filtration units serve as the core pretreatment or intermediate filtration links to ensure the cleanliness of the medical environment.
Ventilation in non-clean areas of hospitals
Applicable scenarios: Fresh air and return air systems in hospital outpatient halls, corridors, wards (non-operating rooms), and laboratory departments (must meet the purification requirements for non-clean areas as stipulated in GB 50333-2013 “Technical Code for Clean Operating Rooms in Hospitals”).
Core value: High and medium-efficiency filtration (F8 grade and above) can intercept bacterial and viral vectors (such as droplet nuclei and dust particles), reducing the risk of cross-infection within the hospital. The low-resistance feature ensures the stable operation of the ventilation system (avoiding insufficient ventilation in wards due to excessive resistance), and the long-life design reduces the frequency of filter replacement (lowering the maintenance burden on medical staff and reducing the risk of contamination exposure).
Pretreatment for biosafety laboratories
Compatible scenarios: Ventilation systems for biosafety Level 2 (BSL-2) laboratories (requiring pre-filtering to intercept external particulate matter and protect precision instruments and experimental samples inside the laboratory).
Core values: Low-resistance design avoids affecting the stability of negative pressure in the laboratory (biosafety laboratories need to strictly control the pressure difference), high and medium-efficiency filtration prevents external dust and microorganisms from entering the laboratory, ensuring the accuracy of experimental data. It is also compatible with the variable frequency control of the laboratory ventilation system (with stable resistance and convenient air volume adjustment).
Pharmaceutical production workshop
Applicable scenarios: Air purification systems for pharmaceutical preparation workshops and raw material medicine workshops (GMP clean areas, ISO 8-7 grades).
Core value: As a pre-treatment unit for high-efficiency filters, it intercepts over 90% of particulate matter, extending the service life of high-efficiency filters (reducing compliance costs in GMP workshops). The low resistance feature reduces the energy consumption of the air conditioning system, and the filtration efficiency is stable (meeting the continuous requirements for air cleanliness in pharmaceutical production), avoiding product contamination caused by the decline of filtration efficiency.
Iv. Data Centers and Computer Rooms: Optimized Solutions for Equipment Protection and Energy-saving Operation
Precision equipment in data centers and server rooms is highly sensitive to air and dust (dust can easily cause short circuits and poor heat dissipation in the equipment), and the air conditioning system needs to operate 24 hours a day. Ultra-low resistance and high efficiency filtration units can achieve the dual goals of “equipment protection + energy conservation”
Ventilation in the data center computer room
Adaptation scenarios: Precision air conditioning and ventilation systems in large data centers (IDC) and server rooms (must meet the requirements of ASHRAE TC 9.9 standard for air cleanliness in server rooms).
Core value: High and medium-efficiency filtration (F7-F8 grade) can intercept dust, fibers and other particles (preventing them from entering the server case, affecting heat dissipation or causing short circuits). The low-resistance feature reduces the energy consumption of precision air conditioning fans (the energy consumption of air conditioning in data centers accounts for 40% to 50% of the total energy consumption, and low-resistance products can save 15% to 25% of energy consumption), and the long-life design reduces the frequency of filter element replacement (lowers the risk of downtime for computer room operation and maintenance).
Ventilation and purification for communication base stations
Adaptation scenarios: Outdoor communication base stations, signal tower rooms (with a lot of dust in the environment and the equipment needs to operate stably for a long time).
Core values: The low-resistance design ensures smooth ventilation of the base station (preventing equipment from overheating and shutting down), and the medium and high-efficiency filtration intercepts outdoor dust and sand particles, protecting the internal communication equipment of the base station. At the same time, it has strong weather resistance (adapting to outdoor high and low temperature environments) and a long service life (reducing the cost of replacement during field operations).
V. Summary of Core Application Scenarios and Selection Suggestions

Core logic of selection
Prioritize matching the filtering efficiency requirements of the scenarios (for example, select F8-F9 levels in the medical and electronic fields, and F7-F8 levels in commercial buildings);
Pay attention to the wind pressure of the system fan (for example, for FFU and small fan systems, products with an initial resistance of ≤50Pa should be selected).
Consider the operating costs (for long-term continuous operation scenarios, prioritize products with high dust holding capacity and low resistance attenuation to reduce energy consumption and replacement costs);
Comply with industry standards (for example, GB 50333 is required for medical scenarios and ISO 14644 for industrial scenarios).
The core value of ultra-low resistance and high efficiency filtration units lies in “maximizing the reduction of system operation and maintenance costs under the premise of meeting purification requirements”. Therefore, the common features of all application scenarios are: clear requirements for filtration efficiency (medium and high efficiency level is needed), and emphasis is placed on energy consumption control, life stability or system compatibility.