I read all the air purifier reviews back in the day when my son was born with a severe brain injury. It was hard separating truth from marketing. But I put many hours into the science behind those air purifier reviews because my son's health was at stake. Best-Home-Air-Purifiers.com was born to help people like you and me make intelligent decisions about air cleaners that will benefit our health, and not just someone's pocketbook. I continue my work today for your benefit. Hence, my master air purifier reviews list:

The best air purification on the market in terms of most particles taken out of the air. Their best selling unit, the IQAir Healthpro Plus, is second to none. These guys make cleanroom/hospital grade air purifiers. This is one hundred times better than any standard HEPA air purifier. One of my most popular air purifier reviews. More about IQAir...
Blueair air purifiers are my favorite top pick ...better than HEPA air filtration, moves the most air while being the quietest on the market, best design, very easy to use. All of their air purifiers are fairly "green" (environmentally good.) The only real competitor for best air purifier would the IQAir line. More about Blueair...
Airfree air sterilizers are filterless, specialized little indoor air purifiers that literally incinerate mold, bacteria, virus, pollen, and any other living thing in the air. These would be great wherever moisture tends to grow these problems, such as basements, laundry rooms. Have also heard anecdotal reports of placing several of them around the indoor to rid dog odor. Filterless. This is one of the truly unique air purifiers available. Pair it with a standard filter air purifier for a winning combo. Of all my air purifier reviews, this is most compelling... More about Airfree...
Austin air purifiers are good quality all around air indoor purifiers for smaller budgets. While not as good as the top picks, these have all around air purification including HEPA filters that last a very long time and excellent gas and odor removal, all metal design...The Austin Air Healthmate Plus is a no compromise, alternative choice in air cleaning. More about Austin Air..
Allerair air purifiers have great specialized models for smoke air purifiers or ridding your indoors of harmful gasses. No one else has as much carbon in their filters for removing these types of pollutants. Check out the Allerair VOCARB for gas removal and the Allerair 5000 DS EXEC for a great smoke air purifier. The Allerair MCS air purifier is good for those suffering multiple chemical sensitivities. More about Allerair...
Aprilaire specializes in whole house solutions and does have a respectable whole house air purifier. Remember, no whole house air purifier can clean to the level of regular room or house air purifier.
The Alen air a350 air purifier model is perhaps the most well known. A standard HEPA with ionizer and carbon filters. Not really that great.
Honeywell Air PurifiersHoneywell air purifiers are a decent, standard, HEPA air purifier. Downside: can be quite noisy. There are better choices.
Holmes Air PurifiersHolmes air purifiers are another modest player in the HEPA market. Makes some tower air purifiers. Not that it's a good thing. You could do better.
Standard HEPA or ionic air purifier. You could do much much better than Kenmore air purifiers.
Now owned by Aprilaire.
Known for the whirlpool whispure air purifiers. A standard air purifier that's very quiet. Currently not available.
Alpine indoor air purifiers are still around but you want to avoid them at all costs and their Living Air and other ozone air purifiers counterparts.
Delonghi air purifiers are a really modest pick for a indoor air purifier. No harm, but you could do much, much better...
The spawn child of the law-suited-to-death alpine air purifiers. You can read about the problems associated with ecoquest air purifiers here.
Another in the long line of loser ionic air purifiers with some kind of collector plate. (Do you collect plates?) Avoid the friedrich air purifiers.
Not even sure if these are made any more. Don't bother.
Hamilton Beach Air Purifiers make ionic air purifiers, some with a HEPA filter...another ionic air purifier...someone give me the duct tape to wrap around my head before it explodes.
Hunter air purifiers make more tower, ionzier/HEPA combo air purifiers. Move on to something else, please!
Ionic breeze air purifiers of the bankrupt (as of Feb. 2008) Sharper Image. As of right now, you can't buy these new, nor would I recommend it if you could. See the full run down on ionic air purifiers here...
An ionic breeze imitator. Ineffective. More about ionic pro air purifiers here if you must.
An ozone air purifier that started the litigation troubles. Avoid at all costs the living air purifiers.
Wow! These are expensive!...and worthless!. Makers of the Oreck XL Tabletop and Tower Air purifiers.
Useless, water-based air purifiers.
Makers of a whole house air purification systems. There are better choices such as the IQ Air Perfect 16, Amaircare air purifiers. See other air purifier reviews for these choices.
See the ionic breeze air purifiers.