Principals of Dynamic Air Cleaners
Dynamic Air Cleaners
work like no other air cleaners because Dynamic Air Cleaners combine
three scientific principles to trap airborne dust particle. The three
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
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
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.
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
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.
account for a large proportion of the dust trapping effectiveness of
Dynamic Air cleaners.
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.
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.