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Views: 0 Author: Site Editor Publish Time: 2026-08-05 Origin: Site
A micro electrostatic filter uses an electric field to charge and capture airborne particles. Unlike a dense disposable mechanical filter, it is designed to collect fine matter while maintaining relatively low airflow resistance.
This makes the technology relevant to air purifiers, return air vents, fresh air ducts and air handling units where both particle control and continuous air circulation are important.
BESIN describes its micro electrostatic technology as an Intense Field Dielectric, or IFD, system.
The operating process includes:
Airborne particles enter the charging section.
The electrical field gives the particles an electrical charge.
Charged particles move toward the collection section.
Dust and fine matter are retained on the collecting module.
The treated air continues through the system.
The company also states that microorganisms carried on airborne particles can be collected and exposed to the strong electric field.
Performance statements for microbial reduction should be validated in the complete equipment and under the intended testing method. A filter module should not be presented as a replacement for required ventilation, hygiene or infection-control procedures.
Every filter creates some resistance to airflow. As resistance rises, the fan may need to work harder to maintain the same air volume.
This can affect:
Clean air delivery
Fan energy use
Equipment noise
Heating or cooling performance
Air distribution
Filter loading behavior
Micro electrostatic filtration uses electrical attraction rather than depending entirely on tightly packed fibers. This allows the collection section to remain relatively open.
For HVAC and high-air-volume equipment, the resistance must still be measured in the installed configuration. Duct layout, filter area, face velocity and surrounding components all influence the final result.
BESIN model MES-HA02 is designed for HVAC return air vents, AHU filter banks and fresh air ducts. The manufacturer publishes the following values:
Item | Published specification |
|---|---|
Main materials | PP, stainless steel plate and stainless steel or tungsten needles |
Frame | Plastic |
Regular dimension range | 200 × 200 mm to 700 × 800 mm |
Maximum custom module size | Up to 1200 × 800 mm |
Available thicknesses | 25, 28, 50, 80 and 100 mm |
Rated wind speed | 1.5 m/s |
Air resistance | 5–8 Pa |
Maximum humidity | 80% |
Power consumption | 3 W |
Reported particle performance | More than 95% for PM2.5 under the stated product conditions |
These values are associated with the listed product. A different module size, airflow or electrical design may produce different operating results.
One of the main advantages of micro electrostatic filtration is that the collecting section can be washed and reused.
A reusable module can reduce reliance on frequently replaced consumable media, but it introduces maintenance requirements that should be considered during equipment design.
The purifier or HVAC unit needs:
Easy access to the filter
Safe electrical isolation
A straightforward removal method
Space for cleaning
Sufficient drying time
Correct reinstallation guidance
Inspection of electrodes and collection surfaces
A washable filter should be fully dry before it is reconnected unless the manufacturer specifically permits another procedure.
Selection factor | Micro electrostatic filter | Dense mechanical filter |
|---|---|---|
Capture principle | Electrical charging and attraction | Fiber interception and diffusion |
Power requirement | Requires electrical power | Normally passive |
Cleaning | Can be washable | Often replaceable |
Air resistance | Designed for relatively low resistance | Depends on media density and loading |
Integration | Requires electrical and safety design | Requires a sealed filter housing |
Maintenance | Cleaning and inspection | Scheduled replacement |
Neither technology is automatically better for every application. A passive mechanical filter may be easier to integrate where no power supply is available. Micro electrostatic filtration may be useful when the project prioritizes low resistance, reusable collection media and long-term operation.
BESIN identifies three main HVAC installation positions:
The module can be fitted at a return air opening to collect particles before recirculated air re-enters the air-conditioning equipment.
A custom-sized module can be incorporated into an AHU alongside other filtration stages.
The filter can be installed in a fresh air system where fine-particle control is needed without creating excessive airflow restriction.
The same technology may also be integrated into standalone air purifiers, provided the purifier includes suitable power, insulation and control components.
Before developing a custom micro electrostatic air purifier filter, determine:
Required air volume
Filter face velocity
Permitted pressure drop
Installation dimensions
Available thickness
Power supply
Electrical control method
Maximum operating humidity
Cleaning access
Required frame material
Upstream pre filtration
Downstream gas-treatment requirements
An upstream pre filter is often useful because it intercepts hair and coarse dust before they reach the electrostatic collection section. An activated carbon or catalytic filter may be added when odors, formaldehyde or VOCs must also be addressed.
Because this is an electrically powered filtration component, the assembled equipment should be evaluated for:
Electrical insulation
Leakage protection
Electrode security
Safe access during maintenance
Moisture control
Ozone performance
Airflow and pressure drop
Cleaning durability
BESIN’s supplied product literature describes isolated positive and negative power points, low ozone emissions and washable construction among the technology’s intended advantages. These characteristics should be confirmed for the exact module and final purifier design.
This technology is particularly relevant when a project needs:
Fine-particle collection
Low filter resistance
A washable collection module
Reduced dependence on disposable media
Custom dimensions for nonstandard equipment
Integration into continuous ventilation systems
The final decision should be based on more than filtration efficiency alone. Airflow, electrical safety, humidity, cleaning procedures and the treatment of gaseous pollutants all need to be considered.
A well-designed system may combine a washable pre filter, a micro electrostatic particle-control module and a dedicated activated carbon or catalytic stage. Testing the complete assembly under the intended operating conditions provides the most reliable basis for performance claims.
