Saturday 9 January 2010

5 Types of Air Purifiers Reviewed

It's now common to find air purifiers in both the workplace and home. Sufferers of asthma and allergies now use them to make the air easier to breath. Due to the sheer amount of different technologies it can be confusing when you decide to buy one.

air-purifier-rating

We reviewed the most popular air purifier technologies so you can find the purifier that is perfect for your household.

Air purifiers work by removing pollutants from the air inside a building. Here are the 5 most popular air purifier technologies:

1. UVGI - or Ultraviolet Germicidal Irradiation works by killing germs or bacteria using light wave radiation. UV are not the most efficient as removing bacteria and mold will require excessive amount of UV radiation before they are destroyed.

2. HEPA air purifier technology (High Efficiency Particulate Air) uses filters to trap pollutants with an efficiency of 99% of all 0.3micrometer particles blocked as well as blocking other tiny particles. HEPA air purifiers work best when they are in a room that air is unable to circulate. HEPA filters work best in industrial setting where airtight rooms exist, however this is not the case in the average home.

3. Activated carbon purifier works by using carbon to absorb pollutants at a microscopic level. Efficiency with carbon filters is not perfect as the adsorption rate slows down and eventually stops when the carbon reaches an equilibrium with the surrounding atmosphere. When the carbon reaches equilibrium then pollutants will not be removed and in some cases can be released back in to the air.

4. Ionization purifiers do not use a paper or plastic filter like those seen in HEPA machines. Ionic purifiers use ions to charge the surrounding particles and then use an opposite charge plate to remove these pollutants from the air. The noise from Ionizer air purifiers is a lot less when compared to HEPA purifiers. If you need to remove very small particles then Ionic are the perfect choice but are not so good at removing smells or bacteria.

5. Photo-catalytic Oxidation is a new technology which might be able to provide large levels of purification using very small amounts of energy. The problem with PCO is that they can't be used in homes as they are still not good at removing pollutants created during the purification process.

Once you have read our reviews of the top 5 technologies we hope that you will find it easy to choose which technology is right for you.

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