All vacuum cleaners use some kind of motor to turn fans that produce air flow. This airflow carries soils into a collection a canister or bag. The air must then be filtered before it is exhausted back into your home’s environment. This is the basic function of all vacuum cleaners. But not all vacuums are created equal. Some are better at filtering small particles than others.
Particles are measured in microns. A micron is one millionth of a meter. The smallest particle that the human eye can see is about 25 microns in diameter. Some vacuum cleaners filter particles as small as .3 microns. Many vacuum cleaners allow much larger particles to get through.
This is a problem, especially in homes with sensitive persons with allergies or asthma. The smallest particles are able to be breathed deeply into lung tissue where they cause irritation and inflammation. Coughing, wheezing and sneezing are the result. In some cases, full blown asthma attacks can happen.
What is in the dust that creates such big problems?
Pollutants include mold, human and animal dander, dust mite feces, insect parts, air pollution, lead dust, carbon, cooking residues and more. Pollutants are captured and filtered out by high quality vacuum cleaners featuring “true HEPA” filtration. HEPA, or High Efficiency Particulate Air filters, are tested and certified to trap 99.97% of all particles down to .3 microns.
A true HEPA vacuum cleaner actually cleans the air while it cleans the carpet. But be careful and do your homework. Just because a vacuum cleaner has a HEPA filter does not mean it is “true HEPA”.
Less efficient vacuum cleaners do not clean the air. Rather, they have the effect of expelling the smallest pollutant particles into the breathing zone where they can remain suspended for hours.