Air Purifiers - A Quick Guide
Not all purifiers are created equal. There are different types of purifiers with different purposes. Not all purifiers improve indoor air quality. Many allergy/asthma doctors will suggest the purchase of an air purifier for the home of asthma and allergy sufferers. Air purifiers are said to relieve indoor allergens, reduce day and night time asthma attacks and in general improve indoor air quality. Indoor air quality became a major concern in the 1990‘s and is a major concern today as well.
HEPA filters or High-Efficiency Particulate Air filters
HEPA Filters are a mat of banded fibers. Tiny particles in the air are trapped by these fibers as the air flows through them.
HEPA filters were first used in the 1940’s to trap radioactive contaminants.
HEPA filters are used today in vacuums, home stand alone units and in home furnaces, to trap pollen, dust mites and other tiny harmful particles.
HEPA filters do not create any ozone but produce more noise than other types of filters.
Or, O3 filters produce a strong oxidant gas.
These filters are not safe in an occupied room.
Activated Carbon is a material that can absorb chemicals on the molecular level. Carbon does not remove larger particles in the air.
Carbon changes contaminants from a gaseous state to a solid state.
Carbon filters are typically used with other forms of filtration.
Ionizers are electrically charged surfaces that attach to airborne particles.
The particles become electrostatically attracted to the surface and thus are then out of the air.
Ionizers do produce ozone though the amount is within safe industry standards.
There are two types: Thos with a fan and those without. The fanless are less efficient though more quiet.
Ultraviolet(UV) Light Purifiers
UV Light Purifiers sterilize are that passes over the UV lamps.
UV Purifiers can be stand alone or installed in forced air systems.
These lights are useful in cooling systems where mirco organisms can form due to the moisture there.
Purifying Hydroxyl Radicals
Hydroxyl Radicals are naturally in our atmosphere.
It is said that OH oxidizes air pollutants faster than ozone.
Hydroxyl Radicals destroy mold, bacteria and viruses.
Next time you are in the market for an Air Purifier, consult with your doctor, learn about the options available and make an informed purchase!
Additional Resources & References