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Ozone Generators vs. Ozone Air Purifiers, What’s the Difference?

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Summary

There are distinct differences between Ozone Generators and Ozone Air Purifiers. There is also some cross-over. Many commercial industries use ozone for cleaning.

Where is the confusion?

First, much of the confusion comes from the misunderstanding of what ozone really is and what ozone really does. Completely read the recommended ozone page in the In-Depth Reference section

below if you haven't already.

Second, the different ozone technologies are generally presented and thought of as "all the same" as opposed to separate distinct technologies designed for different purposes.

It's good to use the right tool for the right job.

Ozone gets a bad reputation because of the ozone layer mentioned in the news and because high concentrations in pollution can cause breathing trouble for young and old people. There is truth

to all of this, but it adds confusion to the truth about ozone air purifiers. The part that is generally left out is that ozone is in all the air we breathe outside and that without ozone we

would all die. It comes down to amount or concentration in the air. Too much or too little, bad news. We need the right amount.

Air purifiers are big business. And I'm not saying all business people are crooked, far from it. Marketing is marketing though and if your air purifier does not use ozone technology and

you stand to lose a lot of money if people use an ozone product over yours, it is awful handy to point the finger and say all ozone is bad. This is further confused by lots of technical talk

and information and fear, etc … Lots of negative marketing.

I'm also not saying that other air cleaning technology is bad, I am saying that negative marketing is going on. It is used in other industries as well, so no real surprise.

A little investigation, reading, and knowledge about the subject will be valuable to you. If you haven't read my ozone air purifier section under active technologies yet, make sure you

do as well as the recommended reference on ozone. It will give you a better background.

More Detail:

There are really 5 or so distinct technologies generally all lumped into what is called ozone air cleaning.

1) Specialized Ozone generators used in industry. These may include generators used for industrial cleaning, food prep and decontamination, municipal water utility cleaning, and some

pharmaceutical clean room applications. Many of these can and are designed to exceed safe ozone limits.

2) Heavy duty, Commercial Ozone Generators used for cleaning and restoration. These are used for "ozone blasting" fire damaged building, auto detailing, mold remediation,

restaurant cleaning, and hotel room cleaning. Most of these are designed to exceed safe limits.

3) Medium Duty Ozone Generators that are marketed as commercial ozone generators, but also say they could be used in your home. These are a little confusing and should be regarded with some

caution. Most are made with professional use in mind, but are marketed to consumers as well. These won't harm you if used properly, but really are cross-marketed and not recommended as an

air purifier. This group draws the most negative publicity from competitors. Most of these can exceed safe limits.

4) Ozone Air Purifiers. Generally ozone is used in tandem with other technologies in the air purifier. It may be a large portion of the total cleaning technology or a small part of the total

cleaning technology. These purifiers are designed to operate within all regulated guidelines and have safety factors, consumer friendly controls and operation manuals. They are best used for

residential and light office duty. Just like any other appliance or machine, read the caution sections and learn to operate your purifier.

5) Air Purifiers that use a technology that may generate some ozone as a by-product of another technology used. UV, Electrostatic Precipitation, Ionization and Media Charged Filters can all

fall into these categories. Other hybrid cleaning technologies may also have some ozone output. Again, these technologies generally stay within regulated limits and are best used for

residential and light office duty.

The 3 big differences that separate an ozone generator vs. an ozone air purifier. 1) Design – are they made for commercial activity or consumer activity?

2) Control – are they all on or all off? Are they made to generate ozone levels above standard regulation for safety? If they do have settings to "blast" ozone, are they properly

marked, consumer friendly, documented, and outlined for safe use?

3) How sold – are they marketed as an air purifier or as an ozone generator?

Again, there is some cross-over. It is not cut and dry.

Think of ozone as a tool. Ozone is a wonderful cleaning tool. It does require some knowledge to use and you need the correct tool for the job.

Let me give you an example that may make things clearer.

Let's say you want to drill a few holes in a door to install a new door handle configuration. This is a job that not everyone would do, but some handy people would and some would find

other ways to get it done. To use the 5 technologies above as a guideline, let's see how we could get the job done.

1) Use an industrial Drill press, vertical lathe or "big drill". Not really practical to use at home. Some of these machines require professional training and set-up. Maybe we

could buy a door pre-made, built from the factory using one of these drills, but it's not right for using at home.

2) Use a professional grade drill. Again, overkill here. If you were a carpenter or had a wood shop it may pay to have all the expensive professional grade equipment, but dog-gone it, we

just want a few holes. Too much for the job. You could hire a professional with this equipment.

3) Ok, maybe we are handy so a high-end consumer/ professional grade setup would work. I only drill a few holes a year and I haven't really had any professional training, so again this

is overkill. Some professionals would use this equipment and if you decided too, expect that the training manual would be aimed at a professional and not at general consumers.

4) Here we go … a consumer drill made for me. Fits in my hand, does the job. It even comes with "dummy" instructions so I don't drill through my hand.

5) ditto to #4.

Now used properly, any of my drills could do the job. Some would require training and experience though and really don't fit the job. Also, if used improperly, I could hurt myself or

others with the drill. If I used the correct tool for the job and took the proper precautions, no problem, proper holes. Right tool, right job.

Ozone is the same folks …..

In-Depth Reference(s)

Recommended: An educational and informational presentation on Ozone (opens a new window)

Buying Considerations:

I may expand this section at a later date, but most of the information on my site is aimed at consumer level air purification. Commercial air purification and the use of ozone generators are

better left up to trained professionals.

With that said, ozone generators do serve a purpose. Seek professional guidance if you feel you have an air concern needing professional help.

Return to STEP 1 Technology from Ozone Generators

How does a Filterless Air Purifier work?

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Summary

Some companies present a case that a filterless air purifier is a better technology then a purifier with a HEPA or other replaceable filter technologies.

"filterless air purifier" – an air purifier that does not utilize any replaceable filter.

Many of these purifiers may have a pre filter, but it generally is a reusable/cleanable variety.

There are four basic types of filterless purifier.

1) Some Electrostatic Precipitators – see the Passive Technology section

2) Some UV products – see the Passive Technology section

3) Most Ozone based purifiers – see Active Technology section

4) Several advanced technology air purifiers utilizing multiple cleaning technologies, all filterless

Interestingly enough, some purifiers using the technologies above do have carbon filters or other replaceable filters associated with them. Again, I would not consider these

"filterless" as they have a replaceable filter associated with the purifier.

More Detail:

1) Electrostatic Precipitators – this technology is covered in the passive technology section, so I will not repeat that information here. I will however add that some units do utilize this

technology without any replaceable filter. Others do include a carbon or other filter as one of the stages of cleaning. Generally this technology alone is not as effective as it would be

combined with other technologies.

2) UV – again this technology is covered in the passive technology section, so I will not repeat that information here. I will however add that some units do utilize this technology without

any replaceable filter. Some may include UV as one of the technologies offered in their air purifier. Generally this technology alone is not as effective as it would be combined with other

technologies.

3) Ozone based purifiers – this technology is covered in the active technology section, so I will not repeat that information here. Most of these purifiers use ozone or a combination of

active oxidizers to clean the air and do not have any filters. Several processes can be employed and are discussed in detail in the Ozone section. Ozone technology alone is not as effective as

it would be if combined with other technologies.

4) High Technology purifiers – Some purifiers utilize several technologies to do a more complete job in cleaning the air. Very few utilize two or more filterless air purifier technologies.

There are a few however. One in particular utilizes Ionization (3 forms), UV, and a small ammount of ozone with other active oxidizers. Each of these technologies is covered in their respective

sections.

Filterless technology has an interesting image as the "new player on the block". It has been around in one form or another for over 20 years. Filterless technology can do a great

job of cleaning the air. It is important to understand all the basic technologies involved first.

It is also important to understand all the marketing tactics involved. Remember this, every air purifier company wants to sell their technology. For many HEPA filter purifiers (and others),

embracing filterless technology would be the "kiss of death" marketing wise. It is a gap that is hard to bridge when you are a company built on Filter technology. They will not

represent both technologies. Many have decided to attack filterless technologies as "all bad" as way to set themselves apart. Whether this is good or bad is not my point. My point is

that it is the way it is.

Keep this thought in the back of your mind, replaceable filters are big business.

Generally there is marketing friction between passive, passive/active, and active purifier companies. Get the facts on the technologies first, then when we talk about individual purifiers,

we can decipher some of the marketing.

In-Depth Reference(s)

– No additional reference information at this time –

Buying Considerations:

There is a clear leader when it comes to filterless air purifier technology (see reviews). A whole new industry of copies and knock-offs have emerged from this main player. Although many of

these "knock-offs" work and do some air cleaning, the "leader" has continued to stay a few steps ahead in technology.

Understanding the basics of filterless technology and of active technologies will help you make the right choice. Make sure to read the reviews as well as the other presentations on

differing technologies to get a full picture.

Going with a filterless air purifier can reduce ongoing costs versus filter technology, but realize there still may be some cost with either the time spent cleaning the purifier or replacing

certain parts that still may break or wear out. Generally speaking there can be a significant ongoing cost savings if the purifier is kept clean.

Return to STEP 1 Technology from Filterless Air Purifier

Is Using an Ozone Air Purifier Safe and Effective?

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Summary

Using an Ozone Air Purifier can be effective, but many claim ozone harmful. Consumer ozone technology has been available for over 20 years. Do complete research when making a buying

decision.

Read my information realizing that it is not very technical. The In-Depth Reference section will cover the technical aspects of ozone in an easy to read format. This information is my

viewpoint after researching the subject and using the technology over the last 18+ years.

There are two main questions to be answered:

1) Is using an ozone air purifier safe?

2) Does ozone clean the air effectively?

Since you are reading this far, I'm assuming a few things. I'm assuming you have heard of ozone. I'm further assuming that you may have heard of the "ozone

controversy". Lastly I'm assuming you want either my viewpoint or you are interested in more information.

I know that assumtions can be a two-edged sword, but consider reading every word in this page including the In-Depth References. You will have a better idea of how ozone works.

More Detail

As you review Air Purifier Company websites and those selling air purifiers, you will find a trend. Most are either pro ozone or con ozone. Interestingly, the ones that sell it, prove that

it is safe and effective and the ones that don't try to warn and prove that it is unsafe. The later group generally uses common negative marketing techniques.

Ozone is a natural substance. It occurs in nature.

Did you know ozone is in the air we breathe outside everyday?

Ozone is generally measured in ppm (parts per million). This is an amount or concentration measurement. As you do research, you will find that too much concentration (too high of a ppm) can

be harmful to humans. You have to dig a little farther to find that too little also can be harmful.

It is an amount question. High concentrations are bad; too little is also bad.

Let me give you an example:

Ozone is an oxidizer. It will oxidize or "eat" certain things. It works best on living things like microorganisms (mold, mildew, and bacteria, etc). It will also clean some VOCs,

and some smells and gases.

Let's say we have a rainstorm and everything is wet. When something is wet indoors it starts to grow mold. Left unchecked, a big, bad mold problem can develop. Mold loves damp, dark

areas. If we did not have any ozone in the air outside, every nook and cranny including the trees would be covered in mold. Thank goodness for natural ozone.

What about high pollution areas and ozone?

When pollution is high, nature adjusts the ozone level higher to remove the air contaminants. After the pollution has been reduced by the ozone, levels return to normal. In cities and higher

pollution areas this can lead to some days with smog or ozone alerts. The ozone level is high because nature wants to clean faster. This high level can affect human breathing.

So, I'm stating that too much ozone is bad and too little ozone is bad; how much is good? There is a range that is deemed safe, beneficial and effective. This is where an ozone air

purifier is designed to operate. Just like any other modern technology, you need to understand how to use it.

Let me give you a few slightly humorous examples:

  • Do you jump in a shower with the scalding hot water on only? – No, you would burn yourself.
  • Do you turn up your stereo or TV full blast and put your ear next to the speaker? – No, you would make yourself deaf.
  • Do you turn your stove on high every time you cook? No, you may burn your food or burn the house down.
  • Do you slam on the gas pedal in your car everywhere you go? No, you may have an accident.

These may seem silly, but all of these modern appliances (shower, stereo, TV, stove, car) could hurt you if used improperly. Are they dangerous? The same thinking could be applied to an

ozone air purifier. As with most modern conveniences there are easily identifiable signs before danger occurs. With ozone, you can smell it and even feel it if it is too high for you. At that

point you can adjust it down. Our bodies generally will sense it just like we sense something is too hot. It is not something that "strikes you down"; you have control. Not

surprisingly there are no deaths attributed to an ozone air purifier. We can't say this for cars or stoves as well as several other everyday technologies.

I have spent literally 100's of hours researching ozone and I am still surprised at the ignorance and misinformation that is out there. Seriously! In many countries ozone is used in

many, many, many applications. Medical and otherwise. It is thought of as almost a miracle.

For detailed information, I would recommend reading the In-depth References below.

In-Depth Reference(s)

Recommended: An educational presentation on presentation on zone (opens a new window) This is "Pro" ozone.

The EPA's information on ozone (opens a new window) This is "Con" ozone.

Note: an ozone air purifier would usually not be considered an ozone generator. See my section on ozone generators for clarification.

Buying Considerations:

The question is "is an ozone air purifier safe and effective?"

The answer is "it depends."

Safety depends on the amount or concentration. An ozone air purifier usually has safety factors built into the product and operate within safe limits. Make sure your brand does.

Most air purifiers also have details on how to get the best results. In the case of ozone, settings, placement, and air flow are the important factors. Also keep in mind that ozone is

effective, but is not generally a total air cleaning solution. For example, it cannot remove dust particles from the air. It is best used in tandem with other technologies.

Many companies have jumped on the ozone bandwagon over the years. This is because making a cheap ozone air purifier is easy. Cheap technology usually isn't good. Others have down played

or removed most references to ozone as a marketing ploy. This also points to cheap products. Still others have stood their ground and advanced their research and have improved their purifiers

with additional technology making ozone a small part of the overall air cleaning process. These companies have alliances with well known organizations and reputable College Research Centers.

With that said, I would highly recommend using only products that have a good reputation and a good following.

There are two "camps" here. Those that love it and those that don't. The old technology meets the new technology. Make sure you read the In-Depth References if you are on the

fence.

You can probably guess I am pro ozone? I am because I understand it and use the technology daily. Am I trying to sell you on it? No, but I do think it is a valid technology and deserves high

consideration.

Return to STEP 1 Technology from Ozone Air Purifier

How Does Ionic Air Purifier Technology Work?

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Summary

Most people are unaware that there are at least 4 different types of ionic air purifier in use today. Ionizers have been around for many years.

How effective are they?

A simplified explanation of the process: The ionic air purifier produces ions. The ions attach themselves to particles (opposite charges attract). The particles attach themselves to other particles or collection devices or charged surfaces and are removed from the air. The details depend on the type of ionic air purifier used. Ionization and ions are produced and are present in the air we breathe outside. Ions are measured by how many are present in a cubic centimeter or cm3. “Typical” clean air outside contains 3000 positive(+) and 4000 negative(-) ions per cm3. This amount can be influenced by a myriad of factors and is constantly changing and constantly replenished by sun, wind, and storms.

After detailed research it is my conclusion that the natural balance of ions outdoors is generally better than our indoor environments.

Have you ever felt like getting outside to get a breath of fresh air? Interestingly enough, some scientists point to +/- ions as part of the reason for outside air “feeling right”.

Now, unfortunately indoor air does presents a problem for ions. In most cases the number of ions is drastically reduced compared to outside air.

Sometimes there are too many positive ions and an imbalance occurs. Generally the imbalance leans towards the positive, but another problem could occur if too many negative ions are present. A balance is best, just like outside.

In-Depth Reference(s)

Wikipedia has general background about ionization (opens a new window)

Buying Considerations

Do your homework.

Because there are several versions of this technology, it can be hard to select the right one. I would stay away from single charge ionizers all-together. Even within the other technology types you need to search diligently for a quality ionic air purifier. Realize that there are really only a handful of companies with a “trust factor” track record. Be wary of the others as marketing hype as well as copy cats and small time vendors exist.

Lastly, the RCI version has a replaceable UV lamp or RCI cell that will need to be replaced every few years. Know and calculate the ongoing cost before purchasing.

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How Does an Electrostatic Air Purifier Work?

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An Electrostatic Air Purifier/Precipitator and an air purifier using Charged Media Filters work on similar principles. Both collect particles inside the unit.

Electrostatic technology uses electronic cells to charge particles within the purifier and immediately trap them on collector plates. These plates then can be hand washed or sometimes put in

a dishwasher.

The Charged Media technology is of the same principle, but the particles are collected in a filter. This method can collect very small particles (as small as .01 microns). The filters do

require cleaning or replacement as needed.

More Detail:

The particles are charged first, before they pass by the collector plate or collector filter. They are charged negatively (-) or with negative ions and the collector plate or filter is

positively charged (+). Just like opposites attract, the particles now are attracted to the collector mechanisms and stay there. The plates must be cleaned as often as needed or the filters

must be replaced as often as needed. If these capturing mechanisms are not cleaned or replaced as needed, the purifier will become less effective.

Both processes produce "some" ozone. In most cases it is minimal and confined to the inside of the purifier. If the ozone word scares you, make sure to understand how much is

produced and read the ozone technology information before purchasing.

In-Depth Reference(s)

Need more information on Electrostatic Technology? (opens a new window)

Buying Considerations

There are very good, innovative, low maintenance air purifiers in this category. There are also some that are less than good. My reviews will help. As with any product with filters, do your

cost and filter replacement homework.

Return to STEP 1 Technology from Electrostatic Air Purifier Technology

Why use an Antibacterial and Germicidal Air Cleaner Filter?

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Summary

When looking for an antibacterial and germicidal air cleaner, using a specialized filter or a specially treated HEPA filter is one possible solution.

How does it work?

This technology works the same as a standard HEPA filter. It is a HEPA filter treated with antimicrobial agents to control growth of bacteria, viruses, and mold.

There are two challenges when using this type of technology for microorganism control. The first is the very small size of the "particles" and getting them to stick. The second is

"killing" the microorganism once it is trapped.

More Detail

Critical to the success of such a filter would be the purifiers ability to sufficiently contain the bacteria, viruses, and mold. The replaceable filter would need to fit tightly against any

housing that contains it. Little if any air leakage should be evident between the filter and filter housing. This may reduce air flow, but will increase the ability of the filter to collect and

trap and treat the microorganisms. Any microorganisms that slip through may be subject to the filter again and again, increasing the chance of "sticking".

There are other ways to control and remove microorganisms from the air.

See UV (Ultraviolet), Ozone, and Filterless technologies

In-Depth Reference(s)

Want to see a fun animation on the small size of microorganisms? (opens a new window) ** Make sure to increase/decrease the magnification arrows. NEW LINK REQUIRED

Buying Considerations

This feature is found mainly on high-end (expensive) air purifiers specifically designed for clean rooms, hospitals, pharmacies, and research facilities. If cost were not an option, it may

be ideal for those with serious decontamination needs or compromised immune systems. Since this method of controlling bacteria, viruses, and mold is HEPA filter related, it generally has a one

room cleaning limitation per air purifier.

Make sure to review the UV (Ultraviolet), Ozone, and Filterless technologies as they may prove more cost effective for this type of air cleaning.

Return to STEP 1 Technology from HEPA Air Purifier Technology

What Does an Air Cleaner Pre Filter Do?

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Summary

The air cleaner pre filter traps large particles entering the purifier protecting the purifier and extending the life of HEPA filters and other internal components.

More Detail:

A pre filter is made to keep large particles and debris from entering the air purifier. This could include hair, dust, pet fur, and other larger particles. Without a pre filter these larger particles would clog HEPA or other filters faster and causes them to be less effective. In other models that do not utilize filters, the pre filter keeps the inside of the machine cleaner and functioning better. Some air purifiers are designed to be easy to clean or require less cleaning, but the addition of a prefilter still can help minimize this cleaning.

Some pre filters are reusable and can be vacuumed or rinsed and then put back to work. The majority however are replacement filters and need to be checked and replaced as frequently as necessary. Each purifier is different and some replaceable filters life can be extended with a quick vacuuming.

“BIG” particles are a fact of life and a pre filter makes sense in almost 100% of applications.

In-Depth Reference(s)

no additional reference material – basic technology

Buying Considerations

If a purifier has no prefilter, make sure to check out how this model operates. If it is a unit with a HEPA filter, the life of the HEPA filter will no doubt be shortened. This means more cost to you (HEPA filters tend to be more expensive than pre filters). If it is a filterless type of technology, you may need to clean the purifier more often or expect a shortened life span of the internal components without a pre filter.

If your air purifier has a washable or cleanable pre-filter, realize that this may be a generous cost savings.

If your air purifier has replaceable pre filters, know the life expectancy and the cost to replace them.

Return to STEP1 Technology from Air Cleaner Pre Filter

Generic Air Filters a Cost Savings?

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Will You Save Money using Generic Air Filters vs. a HEPA filter?

Summary

Companies making air filters must adhere to rigid manufacturing standards in order to use the HEPA name. HEPA is the standard. Be suspect of any filter offered at a cheaper price.

More Detail

You may see claims like:

“HEPA-type”

“HEPA-like”

“99% HEPA”

Watch out for inferior products.

The Department of Energy requires manufacturer HEPA filters to remove 99.97% or more airborne particles of 0.3 micro meter in size.

In-Depth Reference(s)

Article: The Seven Sins of Filter Manufacturers Buying Considerations: – NEEDS LINK TO NEW ARTICLE

I would recommend sticking with the original manufacturer’s replacement HEPA filter unless you are certain that the replacement filter is either a HEPA or up to the standards that the HEPA label represents.

Return to STEP1 Technology from Generic Air Filters

What is HEPA Air Purifier Technology?

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Summary

HEPA air purifier filters (HEPA – high efficiency particulate air filters) were originally designed in the 1940’s and continue to be heavily utilized today. In order for an air filter to earn the trademarked HEPA name it must pass rigid requirements including removal of 99.97% of airborne particles 0.3 microns in diameter (1 micron = 1/25,000 inch).

The American Lung Association says that “particles of 0.3 microns diameter represent the respirable size most likely to reach and be deposited in the alveoli of the lungs; they are also the most difficult to remove by mechanical filtration.”

How does a HEPA air purifier work?

A fan blows (or draws) air through a high tech filter and the particles are trapped as they pass through the filter. If the air bypasses the filter it will not be cleaned. This is a passive technology.

More Detail

Particles exist in many different types and sizes. The HEPA filter is designed to trap these particles as they pass into and through the filter medium. The HEPA filter is designed to maximize air flow and still maximize particle retention. Although the filter will become less efficient over time, it is designed to effectively do its job as it slowly becomes “plugged up”. Life expectancy depends on several factors, but generally is from 6 months to 5 years depending on the brand of air purifier. The size, material, and construction of the HEPA filter will ultimately determine it’s longevity. Higher quality HEPA filters last longer, may be larger and thus generally cost more.

What will a HEPA filter remove?

Airborne particles like Pet Allergens (.3 to 100 microns), Dust and Dust Mite Allergens (10-40 microns), Pollens (10-100 microns), Plant Spores (10-70 microns), Airborne Fungi Spores (0.5 to 5 microns), Airborne Mold Spores (2-20 microns), and larger particles of tobacco smoke (0.003 to 0.04 microns).

What won’t a HEPA filter remove?

Pure HEPA Filters do not remove most odors, chemicals, or gases as these particles are too small. The HEPA filter will not remove most VOCs (Volatile Organic Compounds) such as paints, varnishes, cleaning supplies, glues, and adhesives, nor Microorganisms such as Viruses, Antigens, Pathogens, and Bacteria. Note: some of these substances may become trapped in the HEPA filter, but removal is not guaranteed. In the case of Microorganisms, the particle(s) may become trapped but will not necessarily be killed.

HEPA filters do work effectively for what they are intended to do. One point worth repeating: The air must pass through the HEPA air purifier filter in order to be cleaned. This generally limits the effectiveness of the purifier to the room the unit is located in.

Quality air purifiers often use HEPA filters in tandem with Pre-filters, Activated Carbon Filters, and Antibacterial/Germicidal Filters and sometimes, but less often with UV Ultraviolet lights, Electrostatic Precipitators and Charged Media Filters.

In-Depth Reference

Article: The Seven Sins of Air Filter Manufacturers Buying Considerations: – NEEDS LINK TO NEW ARTICLE

Always check the recommended life expectancy of the HEPA filter for the purifier you are considering. You will generally get what you pay for. Some HEPA filters need to be replaced often, others last longer. The bottom line is there will be an ongoing maintenance cost with replacing them. Some warranties actually depend on changing filters regularly. Most importantly though, a HEPA purifier only works well with a properly maintained filter. All reviews in STEP3 include HEPA filter costs when applicable.

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Buy Air Purifier – Research the Best Places to Purchase

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Buy Air Purifier; Research the Best Places to Purchase

STEP 5 Buy Air Purifier. Done with Steps 1-4? Here are tips on where to buy and how to purchase your air purifier for less.

The Top Brands are listed alphabetically along with my recommended places to purchase each air purifier.

For a short explanation of each recommended link CLICK HERE (takes you to the bottom of this page) Austin Air – Buy Air Purifiers

For AlerG, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

For achoo! Allergy and Air Products, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

Click Here for Austin Air Purifiers on Ebay (opens a new window) – low prices/ used/ older models/new models Blueair – Buy Air Purifier

For AlerG, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

For achoo! Allergy and Air Products, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

Click Here for Blueair Air Purifiers on Ebay (opens a new window) – low prices/ used/ older models/new models Ecoquest – Buy Air Purifier

To Find a Local Distributor CLICK HERE (opens a new window) Risk Free Trial; you will generally pay full price.

Click Here for Ecoquest Air Purifiers on eBay (opens a new window) – low prices/ used/ older models/new models Friedrich Air Purifiers

For AlerG, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

For achoo! Allergy and Air Products, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

Click Here for Friedrich Air Purifiers on eBay (opens a new window) – low prices/ used/ older models/new models IQAir – Buy Air Purifier

For AlerG, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

For achoo! Allergy and Air Products, Inc. CLICK HERE (opens a new window) – great prices, fast shipping, 60-day money back guarantee

Click Here for IQAir Air Purifiers on eBay (opens a new window) – low prices/ used/ older models/new models Oreck – Buy Air Purifier

For Oreck CLICK HERE (opens a new window) – 12 payments 0% interest/ free gift/ 30-day refund policy

Click Here for Oreck air purifiers on eBay (opens a new window) – used or older models

Explanation of Recommended Buying Links:

AlerG, Inc. – AlerG is a good company with ownership that is connected to the mission and objectives of the products, not just profit. I have used them successfully. Here is a short Bio of

David Tan, Owner of AlerG taken from their website: David Tan, B.Sc., MBA, the founder of AlerG.com, personally suffers from a variety of allergies and chemical sensitivities. David is also

the cofounder of Smarthome, Inc. the leading supplier and manufacturer of home automation products. In 2001 he retired from his day to day position as Chairman and President of Smarthome, Inc.

to found AlerG, Inc. to supply and manufacture products to help allergy and chemical sensitive sufferers like himself.

achoo! Allergy and Air Products, Inc. – achoo! Allergy is another good company with solid, involved management. They are a leader as well in allergy and air products. I have used them

successfully. Here is a short snippet of Bio of Cade McDonald, Owner, taken from their website: Our goal: When you think allergy, we want you to think achooallergy.com. We are working

feverishly to provide more products, more information, and more value to the 50 million Americans who suffer from allergies, asthma, and multiple chemical sensitivity (MCS).

Buying Air Purifiers on Ebay – Read this especially if you are new to Ebay. Ebay is a great way to find good deals. There are also possible pitfalls. For best results, always read an items

description completely before bidding. If the product description is unclear, email the owner of the item a question. Do not assume anything if it is unclear. Also, only buy from someone who

has a good feedback rating. Typically someone who has at least 100 positive feedbacks with over 97% positive. Another good indicator is if a seller has been online for awhile. Be wary of new

sellers with little or no positive feedback. As you become more experienced, you may be able to successfully differentiate between good and questionable sellers without much feedback. Until

then, stick to sellers with good feedback. Some of my best deals ever are from Ebay. I use eBay often.

Oreck – Purchasing directly from Oreck is the best way to purchase new Oreck air purifiers. You may also have a physical store locally. If so, consider checking them out for specials. Click

Here for Air Purifier Brands Reviewed but not Recommended

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Air Purifier Guide to Purifier Types

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Air Purifier Guide to Purifier Types

STEP 2 in our air purifier guide is to understand the different possible types of air cleaning. Understanding where you want your air cleaned

is a key to choosing the right purifier.

Let's find out where you want to clean the air.

Do you want to clean air in a Residential or Commercial location? The Residential section for a discussion on typical residential air challenges. I'll present the two main criteria

used to make a decision. The section ends with an action plan.

The Commercial section for a discussion on the additional challenges of cleaning commercial locations, focusing on light commercial. Specialized or large commercial often requires a

custom solution and is outside the scope of this website. I'll present the two main criteria used to make a decision. The section ends with an action plan.

Are you cleaning a Single Room/Office or a Whole House/Business?

The Single Room/Office section for a discussion on single room air cleaning considerations.

The Whole House/Business section for a discussion on cleaning larger areas including multiple rooms.

And lastly, do you want to do any additional cleaning? These three sections present discussions on Portable, Personal, or Automobile/Vehicle/RV air purifiers. Click any or all for

details.

Have you decided where you want to clean your air?

If you have read through the technologies in Step 1 and looked at the different cleaning categories in Step 2, you are ready to do research in STEP 3 Reviews.

Let's continue onward…

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Air Purifier Comparison of Technologies

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STEP 1 in our Air Purifier Comparison is to understand the basic technologies. Air cleaning can be categorized by two basic terms: Passive or Active.

Some air purifiers include a combination of technologies. These could be Passive, Active or Passive/Active combining both active and passive technologies.

Let’s start with some basic definitions:

“Passive” an air cleaning process that occurs at or inside of the actual purifier. The air is drawn to the technology for cleaning.

“Active” an air cleaning process that occurs away from or outside of the actual purifier. The technology goes out to clean the air.

“Passive/Active” doesn’t apply directly to any one technology, but could be achieved if an air purifier contains multiple technologies.

Okay, this is an important distinction, so quick review: Passive = inside the purifier, Active = outside the purifier, and Passive/Active = combination of inside/outside the purifier.

Let’s Compare Each of the Key Passive Technologies:

And Finally, Let’s Review the Related Topics:

Do you need a way to rank which technologies are important to you in your air purifier comparison? Take some scrap paper and rate each technology from 1 to 10 in importance to you. When finished you will have a better idea of which technologies you find most important. Don’t worry too much about details at this point, just having a general feeling of your likes and dislikes is what we’re after.

Done comparing technologies?

Then it’s time to move along to STEP 2 Category: We’ll decide which category of purifier you want and where you want to make your air cleaner.

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How to Choose the Best Air Purifier

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Important: Only Purchase an Air Purifier After Researching the Facts

    Choosing the right air purifier is an important long-term decision. There are literally dozens of brands and hundreds of different purifiers to choose from.

    • Which technology should you use?
    • What air space do you want cleaned?
    • Which type of purifier will work best for your situation?
    • How do you choose?

    You don't need to become an expert, but spending a little time researching now will pay big dividends in the long run.

    I would recommend two ways to use this website:

    • GOOD – Use the Index to browse the areas important to you.
    • BETTER – Start at the beginning and go through the 5-Step Guide.

    If you choose to browse the Index, realize that a working knowledge of the technologies and types of purifiers will help you review and choose the best purifier for your needs. After

    browsing, if you find that you cannot make up your mind, start over at the beginning and work through the 5-Step Guide in order. It will help you make a better choice.

    The 5-Step Guide

    STEP 1 Technology

    Start here to understand the basic technologies. STEP 1 in our Air Purifier Comparison is to understand the basic technologies. Air cleaning can be categorized by two basic terms: Passive or Active. Each technology page has a summary, a more detail section, and when applicable an in-depth reference section.

    STEP 2 Types

    Select which type of purifier you want to fit your cleaning needs. In our air purifier guide I explain the different possible types of air cleaning. Several distinct categories are discussed. You will find information on Residential VS. Commercial, Single Room VS. Whole House, and Single Office VS. Whole Business.

    There are additional sections on Portable, Personal, and Vehicle purifiers.

    STEP 3 Reviews

    Review the top brands. in our air purifier review we compare the top brands of air purifiers on the market. I would recommend browsing these pages briefly before going on to STEP4 Top 10. After reviewing the Top 10, go back and spend additional time in the reviews as needed.

    STEP 4 Top 10

    Review Top 10 recommendations.

    Where I present my top 10 air purifier rating list

    STEP 5 Buying the Air Purifier

    Learn where to shop online to get the best deals. The guesswork is removed; the best methods and places to purchase are presented for each recommended air purifier. Done with Steps 1-4? Here are tips on where to buy and how to purchase your choice for less.

    It's really that simple!

    Invest a just a few hours in this guide and when you get done, you will be able to make a wise, educated choice.

    If this site has helped you choose your best air purifier, drop me a line … I'd love to hear about your results!

    Other Useful Links

    Best Air Purifiers: Summary List of Reviews

    This is a summary list of the best air purifiers to the worst air purifiers reviewed on this site.