   
Filterless Air
Purifiers
In the developed world there is an ever increasing
awareness of the dangers of air pollution. Such awareness brings an increasing demand for air filtration
devices and systems. These devices and systems are to be found in burgeoning numbers in offices, factories
and homes alike. As the demand grows, so more and more different methods and technologies are employed to
best remove the harmful pollutants that surround us and impact upon our
health.
The choice of air purifiers/ cleaners available
on the market today is wide and growing. From the small portable units for use in the home to the very large
fixed units found in office blocks and industrial units the choice is to be found. Likewise the technologies
employed vary for different applications.
The paramount purpose of all these systems is the
removal of hazardous substances from the environments in which they are housed. This is achieved by
the removal of these substances, particles and gases, by means of filtration. Whilst many systems use
the more conventional HEPA or High-Efficiency Particulate Arresting filters, some of the more advanced
designs use a filterless air purifier system in order to deliver pure air. These filterless air
purifiers/cleaners are particularly efficient in removing both measurable particulates and noxious gases
alike.
Filterless air purifiers performs so well by electro
statically charging the pollutants as they are passed through the device. This is achieved by charging two
plates with opposite polarity, one being positive and the other negetive. A charge is induced into the
pollutants as they are forced by the plates. These charged particles are then attracted to the second plate
with the opposite charge thus removing the pollutants from the air stream that is reintroduced into the
closed environment.
The advantage of the filterless air purifiers
filtration systems over that of the conventional type of filters is that no changing and renewing of
filters is necessary at regular intervals thereby saving the cost of so doing. In addition the filterless air
purifiers tend to be much quieter in operation compared with
others.
One such example is the filterless ionic breeze
filters which appears to be a contradiction in description. In fact the filtration of airborne pollutants
occurs as described above. The static electrical field generated between two plates create a slightly lower
pressure than the surrounding air thereby inducing a flow of air between the plates. We therefore have an
airflow or ionic breeze which will eventually clear a working space of airborne contaminates. As there is no
fan motor running the unit is virtually silent in operation. There is a view, however, that these type of
units are not the best air purifiers filters nor the most efficient, one filterless air purifier reviews on
filters reached this conclusion. It argued that the ionic breeze is not strong compared with
units equipped with a fan. Other filterless consumer reports on filters made the point that this is offset by
the very low running costs and ease of maintenance offered by these types of air purifiers/
cleaners.
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