Quick Intro

What's HEPA?

High-efficiency particulate air (HEPA), also known as high-efficiency particulate absorbing and high-efficiency particulate arrestance. Filters meeting the HEPA standard must satisfy certain levels of efficiency. Common standards require that a HEPA air filter must remove—from the air that passes through—at least 99.95% (European Standard) or 99.97% (ASME, U.S. DOE) of particles whose diameter is equal to 0.3 μm; with the filtration efficiency increasing for particle diameters both less than and greater than 0.3 μm.

hepa prototype
What's MESP?

Micro ElectroStatic Precipitator is a new generation air purfication technology. Intense field dielectric describes the mechanism by which the MESP filter is able to remove even the tiniest particles without the use of a high-pressure-drop fiber matrix. Airborne particles are first given an electrical charge, then passed into a honeycomb of hollow polymer flutes, 2-4 mm in diameter. Encased between rows of flutes are thin electrode sheets, which generate intense electrical fields. The polymer flute material is dielectric, which prevents current flowing between electrodes but does not inhibit creation of an intense field within the flutes. Charged particles are pulled to the walls of the flutes, where they stick.

Mesp prototype


HEPA Is NOT Designed For Sterlization.

1. The HEPA filter can capture viruses by attracting particulate matter. Viruses basically can not exist independently in the air, and will adhere to airborne particles and droplets (the lastest research shows airborne particles could play more important role than droplets). However, the method of physical filtration may miss some smaller particles, so the efficiency of viruses removal is not very high.

2. The viruses captured by HEPA filter is active, so there are two risks as following:
-It may be blown out by the wind to re-contaminate the indoor environment, especially if the available dust holding capacity of the filter is not enough, it will overflow
-There is a very big risk when replacing the filter, which will cause the risk of virus infection of the operator.

MESP Air Purifiers Are Perfect Air Sterilizers.

A properly maintained MESP filter should be highly effective at capturing and trapping microbes such as germs, bacteria, viruses, mold, etc. Meanwhile MESP system will defenitely disintegrate them with high voltage (over 10KV) strong electrostatic field. The official test report in China claims that MSEP products could more than 99.99%+ disinfect viruses. Safe and controllable!

An independent U.S. research laboratory conducted the research study by introducing the SARS-CoV-2 USA-CA1/2020 pathogen to an AQT air purifier built with MESP technology. The test result showed a significant reduction of pathogen at the downstream collection point and achieved a 99.99% SARS-CoV-2 sterilization rate. SARS-CoV-2 is the virus that causes COVID-19. A copy of the test report is available here.

Technical Comparison

(particle capture 0.3 microns)
Excellent Excellent +
99.97% Up to 99.99%
Pressure Drop
Poor >Excellent
0.6 - 1.2” wg (150-350 pascals) >0.04-0.2” wg (10-50 pascals)
Energy Cost
(@ $0.10/kWh)
Poor Excellent
2’ X 2’ filter may add $400 or more per year in electricity costs. Comparable MESP filter will add only about $90/year in electricity costs
Maintenance Cost Poor Excellent
Final and/or pre-filters require frequent replacement/disposal. Occasional cleaning takes only minutes.
Service Life Poor Excellent
Loads quickly unless configured with substantial pre-filtration. Properly maintained MESP filter is permanent: Never needs replacing.
Noise Poor Excellent
High pressure drop = high noise Low pressure drop = quiet air flow

MESP® Indoor Air Clean Product Scope

Whole house air sterilization and purification solution

We offer Portable Air Sterilizing Purifier for residential and other small spaces, and Air Conditioning Sterilizing Purifier (In-Duct Air Purifier) for commercial spaces.
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