For allergy sufferers, vacuuming can turn into a never ending battle where even the most valiant of cleaners may succumb to a sneeze or two when allergens raise their nasty little heads. One of the reasons may be that your tried and true vacuum is simply exhausting dirt back into the air in your home every time you use it! Even expensive cleaners are lost in the dust without adequate filtration. In order to have a fighting chance against indoor pollutants, a Nilfisk HEPA-filtered Allergy Vacuum is the best, most cost effective way to control your environment.

Important Facts Pertaining to Particle Sizes Small particles are generally measured in fractions of a meter. One µm (micrometers - formerly microns) equals one one-millionth (10-6) of a meter. The following chart contains the particle sizes of some common items:

Human hair Dust mite waste particles      Mold Pollen Bacteria Asbestos (fibers)

60.0-90.0 µm 10.0-24.0 µm 4.0+ µm 10.0-40.0 µm 0.3-50.0 µm 3.0-20.0 µm

Particles below 10 µm are invisible to the human eye. The most common airborne particle size is 2.4 µm. The most harmful Respirable Size Particle (RSP) is 0.3 µm. The average vacuum cleaner only filters particles from 30 to 50 µm, thus exhausting harmful respirable allergens back into the air!

Water filtration vacuum cleaners have been proven, in study after study, to dissolve allergens and then emit the particles back into the air through a mist. The efficiency rating of a vacuum cleaner is important when determining the actual filtration capabilities because it pertains to the ability a filter has to retain particles that pass through its media. For example, if a vacuum cleaner claims to filter 0.3 microns or smaller, it still will not be very effective unless it has a high efficiency rating. Efficiency ratings are stated in the form a percentage. One must remember to consider micron sizes and efficiencies when comparing vacuum cleaners. The standard HEPA filter must retain all particles down to and including 0.3 microns in size at 99.97% efficiency, thus retaining all harmful allergens. Many physicians have been recommending the Nilfisk Family Vac to their allergy patients. The Nilfisk filtration system is unique because it is gradual. Dirt passes through three layers of filtration, each capturing smaller particles as the air passes through the filters media. Ideally, graduated filtration increases the life of the HEPA filter, thus saving it for crucial particle retention. Due to their filtration and reputation, Nilfisk vacuum cleaners have become well known industrially and throughout households across the country for decades!

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