How soft ionization works

Plasma Air uses soft ionization, also known as bipolar ionization, technology to proactively purify indoor air.

What is soft ionization?

Let's review what soft ionization is and how it works to clean the air of pollutants.

Particles cluster

Positively and negatively charged ions cause airborne particles to cluster.

Particles caught

Large particle clusters are caught in filters.

Pathogens inactivated

Bacteria and viruses bond with oxygen ions and are inactivated.

Odors neutralized

Many odorous gases and aerosols oxidize with oxygen ions and are neutralized.

VOCs inactivated

Oxygen ions cause a reaction with VOCs breaking down their molecular structure.

Much like sunlight does in the atmosphere, soft ionization technology, also known as bipolar ionization, produces a natural bio-climate rich in positive and negative oxygen ions. The negative ions contain an extra electron while the positive ions are missing an electron resulting in an unstable condition.

In an effort to restabilize, these polarized ions seek out atoms and molecules in the air to trade electrons with, effectively neutralizing particulate matter, bacteria and virus cells, odorous gases and aerosols, and VOCs.

What are oxygen ions?

Ions are molecules or atoms that contain an electrical charge and exist in nature in various sizes. Small ions only last between 30 and 300 seconds before losing their charge but are extremely active.

Ion densities range from 900 to 1,100 negative ions and 1,000 to 1,200 positive ions per cubic centimeter (ions/cm3) in pristine natural environments. At sea level, ion density is typically around 500 negative and 600 positive ions/cm3. In cities and inside buildings ion levels drop by 80% to 95% and can be barely detectable in small spaces.

As ion density decreases, so does the air quality. By increasing the quantity of both positively and negatively charged small oxygen ions, air quality is improved. This is the basis of Plasma Air's bipolar ionization technology.

How does it work?

Watch the video to learn how bipolar ionization, or soft ionization, technology works within a home or building to continuously purify the air by producing negatively and positively charged oxygen ions.

How is it installed?

Plasma Air products use soft ionization, or bipolar ionization, technology, which produce oxygen ion molecules, essentially nature's way of cleaning the air. 

The product is mounted in the duct or at the blower housing.

These oxygen ion molecules are circulated throughout the home or building's ductwork system, inactivating and reducing airborne pathogens and pollutants.

Affordable, Safe & Effective

Plasma Air's soft ionization technology is safe, low maintenance, easy-to-install, energy efficient, and highly effective on pollutants such as particulate matter, bacteria, viruses, mold spores, odors, and VOCs. 

Viruses & Bacteria

Reduce dangerous pathogens.


Neutralizes harmful VOCs.


Inactivate mold spores.


Reduce fine particulate matter.


Neutralizes offensive odors.


Reduce pollen and pet dander.

Plasma Air Soft Ionization

HVAC air purification products for residential and commercial applications. Plasma Air products use soft ionization technology to proactively purify indoor air.

Plasma Air Commercial Solutions

Plasma Air commercial products use soft ionization needlepoint technology to safely and continuously purify the indoor air. The technology is installed in thousands of commercial, institutional, and industrial buildings around the world.

All Plasma Air products are UL 2998 validated for zero ozone emissions.

Plasma Air Residential Solutions

For residential and light commercial applications, the PlasmaPURE products provides safe and continuous air purification. Using soft ionization technology, the units neutralize pathogens and pollutants plus reduce odors.

All PlasmaPURE products are UL 2998 validated for zero ozone emissions.

How to purchase

Contact us directly for more information about purchasing Plasma Air products.

Contact Us

USA Headquarters
3540 Toringdon Way, Suite 200 Charlotte, NC  28277
1 866 508 1118

Ireland Headquarters
DCU Innovation Campus
Old Finglas Road
Glasnevin, Dublin D11 KXN4
+353 1 907 2750