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Filtration Efficiency
While cleaning, surface dust particles disperse into the air and result
in airborne dust and allergens. These dust particles when inhaled can
affect our general health. We can effectively control the dust particles
in the air we breathe by using vacuum cleaners with efficient
filtration. A vacuum cleaner uses the force exerted by its air flow,
along with brushing action, to pick up the dirt and dust and carry it
into its dust-bag or other dirt container. For vacuum cleaners that have
external exhausts, such as Central Vacuum Systems, the same air is
circulated back into the air after passing through the vacuum cleaner.
Importance of Filtration Efficiency
Dust mites are usually responsible for dust related allergens. These
dust mites are so small (about 125 µm long), that they are just barely
visible to the naked eye under normal conditions. Some dust mites can be
even smaller. They are everywhere around us. We breathe in and out
several thousands every second. They are scavengers that feed on our
skin scales but can not actually bite us. The point to be noted here is
the minute nature of these organisms.
To keep us from breathing in dust mites and other allergens, a vacuum
cleaner’s filtration system must be very efficient at trapping very
small particles. Vacuum cleaner manufacturers have progressed in
improving filtration efficiency of their vacuum cleaners. Over time, the
air filtration technology has evolved, and innovative ideas have been
adopted. HEPA specification is one of the latest and highly recommended
filtration efficiency standards. Vacuum cleaners with HEPA compliant
filter are highly recommended for the people who have disorders like
asthma and allergies.
HEPA and ULPA Filtration Specifications
HEPA (High Efficiency Particulate Air) was developed by the Atomic
Energy Commission during World War II as a filtration efficiency
specification for filters to remove radioactive dust from nuclear plant
exhausts without redistribution. A HEPA compliant filter has the
capability to filter out particles as small as 0.3 µm in size with an
efficiency rating of 99.97%.
The term HEPA is used primarily in USA. In Europe the same filtration
efficiency specification is known by the term S-Class specification.
This indicates that the filtration efficiency of that filter meets
standards like the British Standard 5415 and German norm: DIN 2418B Ti-E
EU 13 for filtration performance.
A ULPA (Ultra Low Penetration Air) compliant filter (theoretically) can
remove from the air at least 99.999% of dust and any airborne particles
with a size of 0.12 µm or larger. These filters are made for
environments like pharmaceutical labs, where these smallest particles
can cause critical problems.
Vacuum cleaners with HEPA and ULPA filtration efficiency are tested and
marked with a certification number. The vacuum cleaners claiming to have
HEPA or ULPA filtration specifications must have this certification on
their vacuums and in accompanied documents. Vacuum cleaners should be
completely sealed and all air must pass through the filters.
Vacuum Cleaners with HEPA Filters
Following is the list of vacuum cleaners with HEPA filters in completely
sealed systems.
Benefit from DavesVac’s time-tested
experience in the field of vacuum cleaner service. Our trained staff of
service technicians is always available to handle your vacuum sales and
service needs, professionally.
Click here to contact us for details.
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