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What's a Micron?

A micron is a measure of length: "1 micron equals 1 millionth of a meter!".

A particle that is 10 microns or less in size is not visible to the naked human eye.

Is 0.3 Microns Filtration Important?

YES! Particles that are 0.3 micron in size are the most difficult particles to trap and contain within a filter. Also, 0.3 micron particle, when inhaled, passes easily into the body's respiratory system so the body's natural defense system is more vulnerable to these small particles. This is why ONLY HEPA filters are recommended by Allergists and Doctors..
 

YES! Leaving the unit ON even when you are away lets the unit constantly scrub the air. Also, if a unit is turned off for a long period of time and then turned back on, you may smell some of the captured particles within the HEPA and or carbon. You should ALWAYS leave a HEPA unit running 24/7. If you do turn it off for days and weeks you are best to also change the filters. Most people's reasoning for turning it off is to save on electrical costs. This is why an energy efficient blower motor (low wattage) is the best! 

NO! The higher the wattage simply means the higher in electrical costs to run. High quality and High-End HEPA air cleaning units do not use lower cost, high energy using fan motors. Energy efficient motors are available but at a higher cost to purchase. Also, most High Quality Fan Motors are also quieter! A portable HEPA Air Cleaner with a quality energy efficient fan motor should be in the area of 80 to 200 Watts MAX at 350 to 600 CFM.

Examples of some common air contaminants and their size in microns:

• Human Hair ......................................... (70 - 100 microns)

• Human Sneeze ................................. (10 - 100 microns)

• Pet Dander .......................................... (0.5 - 100 microns)

• Pollen ................................................... (5 - 100 microns)

• Spores from Plants .............................. (6 - 100 microns)

• Mold...................................................... (2 - 20 microns)

• Smoke ................................................... (.01 - 1 micron)

• Dust Mite Debris ................................. (0.5 - 50 microns)

• Household Dust ................................. (.05 - 100 microns)

• Skin Flakes ........................................... (0.4 - 10 microns)

• Bacteria................................................. (0.35 - 10 microns)