Dynamic Air Cleaners work like no other air cleaners because Dynamic Air Cleaners combine three scientific principles to trap airborne dust particle.  The three principles are impingement, Polarization and agglomeration (Almost every other competitive air cleaner uses only impingement.) 

6,000 volts (at 22 billion ohms which make is safe for humans and virtually short-circuit proof) charge a wire mesh screen resting between two glass fiber media pads, which are sandwiched between two outside, grounded screens.  This charge polarizes the glass fiber media so that dirt entering the filter is arrested by collision, electrical attraction to the fibers, and diffusion.   As dirt is attracted to the filter, it actually helps increase the efficiency of the filter by contributing to the polarization and impingement effects of the filter.   This whole process works without producing harmful and toxic ozone. 

Impingement

Impingement is the process that all media filters use to trap dust.  Simply put, in order to be caught, dust particles must strike and become attached to the filter media.

There are some problems with impingement type filtration that Dynamic Air Cleaners avoid.  The main problem with impingement is the relationship between efficiency and air flow.  Basically the more dense the filter (thus the more effective it is) the more restriction it has on air flow (or drop in efficiency).  This means that the more effective an Impingement air filter is, the more it will cost to implement and operate.   High Efficiency Particulate air filters (HEPA) have very high efficiency along with very dense fiber packing and very high resistance to air flow.  They work well in small areas where a large air flow is not important.  But in larger spaces, HEPA filters require powerful fans to move the air through the filter, thus restricting their usefulness.   They can also be very noisy.

Dynamic Air Cleaners, avoid most of the impingement problems by engaging polarization and agglomeration to increase the effectiveness of the filter media, permitting very high efficiency with low resistance to air flow.

Polarization

It has been known almost since the discovery of electricity that an electrical charge will have an influence on any object in the vicinity of the charge.

In the case of Dynamic Air Cleaners, a very strong (6000 volt) static electric charge is established on a screen.  Very close to this static charge, and being influence by it, are both the filtering media and the dust particles.  As a result, both the filter media and the dust particles take on an electrostatic charge, or "polarized" charge. 

To understand more clearly the meaning of this polarizing effect, one can imagine each filter strand and each dust particle as acting like a series of tiny magnets.  Most of us have played with or experimented with magnets.  This experience has shown us that magnets will attract one another from a distance.  The magnetic force will draw the magnets together, finally causing them to stick to one another.  In other words, each magnet has an influence over a distance far larger than its actual physical size.

The same situation occurs with the polarized particles in a Dynamic Air Cleaner.   The area of influence of each polarized particle is far greater than its actual physical size, and polarized particles can be drawn together from a  distance.   In other words, many more dust particles will be influenced by a single strand of filtering media when it is polarized.  This means the collecting effectiveness of each strand in increased and therefore the overall efficiency of the filter is increased by the polarizing voltage.  Of course, this improvement is achieved without increasing the resistance to air flow.  In fact, lower density filtering materials can be used and therefore pressure drops actually decrease.

One other important fact about polarized particles is that they only remain polarized as long as they are influenced by the static charge.  If dust particles leave the filter, they will carry no residual charge and will thus be free to travel through the system to be captured on a subsequent pass.

Polarization effects account for a large proportion of the dust trapping effectiveness of Dynamic Air cleaners.

Agglomeration

Polarized particles, acting like tiny magnets, will be attracted to the filter media.   But as we said, the goal of Dynamic Air Cleaners is to increase efficiency and effectiveness.  Therefore, we allow for agglomeration.  To maintain air flow, some particles will pass through the filter on their first pass, but they are captured on subsequent passes, thus giving us high efficiency with the effectiveness of HEPA cleaners after several air exchanges.  Agglomeration allows us this "best of both worlds" situation.

When particles pass through the Dynamic Air Cleaner, they act like little magnets and agglomerate -- group together as larger particles which are captured by the filter media.   Once a particle is captured by the filter, it will continue to agglomerate with other particles entering the air cleaner.  Particles that pass through the air cleaner continue to agglomerate with other particles, forming larger particles that will be captured by the filter on subsequent passes. 

Studies of agglomeration have shown that Dynamic Air Cleaners actually filter particles smaller than 0.3 microns by agglomerating them into larger particles.  This is why Dynamic Air Cleaners are so effective with bacteria, viruses, and molds.  

The combination of electrostatic polarization along with the process of agglomeration makes the Dynamic Air Cleaner completely unique and a highly efficient air filter.   This is achieved with very low resistance to air flow.  In other words, Dynamic Air Cleaners are as effective or more effective than other air cleaners without the energy use and restricted air flow of other systems.