Air Purifiers Buying Guide
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Brands
Whynter  Air Purifiers Whynter Air Purifiers
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Asept-Air  Air Purifiers Asept-Air Air Purifiers
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Air Pura  Air Purifiers Air Pura Air Purifiers
Top pick: Air Pura I-600 Healthcare Air Purifier
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AirFree  Air Purifiers AirFree Air Purifiers
Top pick: AirFree Platinum 2000 Ozone Free Sterilizer and Air Purifier
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Alen  Air Purifiers Alen Air Purifiers
Top pick: Alen A350 HEPA Air Purifier
See all: Alen Air Purifiers
AllerAir  Air Purifiers AllerAir Air Purifiers
Top pick: AllerAir 5000 Exec Air Purifier
See all: AllerAir Air Purifiers
Amaircare  Air Purifiers Amaircare Air Purifiers
Top pick: Amaircare Portable 3000 HEPA Air Purifier
See all: Amaircare Air Purifiers
Austin Air  Air Purifiers Austin Air Air Purifiers
Top pick: Austin Air Allergy Machine
See all: Austin Air Air Purifiers
Blueair  Air Purifiers Blueair Air Purifiers
Top pick: Blueair 201 HEPASilent Air Purifier
See all: Blueair Air Purifiers
Cloud 9  Air Purifiers Cloud 9 Air Purifiers
Top pick: Cloud 9 150T Air Purifier
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Hamilton Beach  Air Purifiers Hamilton Beach Air Purifiers
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Hunter  Air Purifiers Hunter Air Purifiers
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Hyundai  Air Purifiers Hyundai Air Purifiers
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LakeAir  Air Purifiers LakeAir Air Purifiers
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Neoair  Air Purifiers Neoair Air Purifiers
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NQ Clarifier  Air Purifiers NQ Clarifier Air Purifiers
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Rabbit Air  Air Purifiers Rabbit Air Air Purifiers
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Sunpentown  Air Purifiers Sunpentown Air Purifiers
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Surround Air  Air Purifiers Surround Air Air Purifiers
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Tiger  Air Purifiers Tiger Air Purifiers
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Ultra-Sun  Air Purifiers Ultra-Sun Air Purifiers
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Air Oasis  Air Purifiers Air Oasis Air Purifiers
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What Do You Want to Treat?
What you want to treat determines the filter type you need. The more you spend, the more filtration you'll get, both in quality and coverage area.
Mold  Air Purifiers Mold Air Purifiers
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Allergies/Asthma  Air Purifiers Allergies/Asthma Air Purifiers — Allergy and asthma sufferers can get relief from pretty much any air purifier with a quality HEPA filter, an electrostatic filter, or AirFree's thermodynamic, filter-free technology. The only air purifiers we wouldn't recommend for asthma or allergies are ozone or ionic generators, both of which produce ozone -- a potentially harmful lung irritant for asthmatics, children, or the elderly. Keep in mind that with any air purifier, you get what you pay for: higher-priced HEPA models get you tighter casing for more efficiency, and higher-priced HEPA and Carbon or UV models have more media and higher-quality construction.
Top pick: Austin Air Jr. Allergy Machine
See all: Allergies/Asthma Air Purifiers
Chemicals  Air Purifiers Chemicals Air Purifiers — Folks with severe chemical sensitivities should look for high-end machines that combine HEPA and activated carbon, which "adsorbs" smoke, gases, fumes, and other noxious chemicals through chemical attraction. AllerAir's vocarb series features pounds and pounds of activated carbon specifically engineered to relieve MCS sufferers. The IQAir series is also renowned for its gas-phase media, which filters chemicals and gases as well as molds, bacterias, and bigger particles.
Top pick: NQ Clarifier Standard Air Purifier
See all: Chemicals Air Purifiers
Dander/Pollen/Dust  Air Purifiers Dander/Pollen/Dust Air Purifiers — If all you're suffering from is dander, dust, or other allergens, you'll be just fine with a solid HEPA-based air purifier or one of AirFree's innovative thermodynamic models. Just make sure you've got a machine that's powerful enough to treat the necessary space (as measured by coverage area or CADR).
Top pick: AirFree Platinum 2000 Ozone Free Sterilizer and Air Purifier
See all: Dander/Pollen/Dust Air Purifiers
Odors  Air Purifiers Odors Air Purifiers — To eliminate odors alone, go for a HEPA/carbon or HEPA/charcoal model or an ion or ozone generator. The latter two are generally much less expensive but much more controversial: they produce ozone, a lung irritant that will affect asthmatics, the elderly, and infants. The HEPA/carbon and HEPA/charcoal models do much more than just treat odors; they eliminate tons and tons of particles along with toxic chemicals and gases.
Top pick: AllerAir 4000 DS Exec Air Purifier - Fast FREE FedEx Shipping!
See all: Odors Air Purifiers
Urban Pollution  Air Purifiers Urban Pollution Air Purifiers — If you're working in, driving through, or sleeping in an environment with a lot of chemicals, you should look for high-end machines that combine HEPA and activated carbon, which "adsorbs" smoke, gases, fumes, and other noxious chemicals through chemical attraction. AllerAir's vocarb series features pounds and pounds of activated carbon specifically engineered to relieve MCS sufferers. The IQAir series is also renowned for its gas-phase media, which filters chemicals and gases as well as molds, bacterias, and bigger particles.
Top pick: AllerAir 4000 Vocarb Air Purifier
See all: Urban Pollution Air Purifiers


Where Will You Use It?
You wouldn't buy a huge air purifier for your car, and you wouldn't buy a tiny unit for your welding garage, either. We've matched power and filtration types to the settings where they'll be most effective. Want an air purifier for a big hospital room? You'd want a powerful unit that combines HEPA and UV. Want a unit for your nursery? Make sure it's got HEPA and can cover about 200 sq. ft. And so on.
Bedroom or Nursery  Air Purifiers Bedroom or Nursery Air Purifiers — There are few lungs more vulnerable than developing lungs, which is why it's a great idea to give your little one the gift of clean air from a very early age. We've selected HEPA and thermodynamic models that cover smaller spaces -- perfect for nurseries and bedrooms. We do not recommend ionic or ozone machines; they produce ozone, which can be harmful and irritating to lungs at any age.
Top pick: Austin Air Baby's Breath Air Purifier
See all: Bedroom or Nursery Air Purifiers
Car  Air Purifiers Car Air Purifiers — Need a little mini-purifier for your car or desk? We've got a bunch of 'em: small enough to fit your vehicle but powerful enough to treat fumes from the busiest, most polluted roads.
Top pick: NanoBreeze Car Air Purifier
See all: Car Air Purifiers
Entire House  Air Purifiers Entire House Air Purifiers — If you'd like to treat your whole house with one machine, choose either a central air handler, which works with HVAC systems, or a model that covers over 1,000 square feet. You can also choose to buy smaller models and put them in your most frequently used rooms, though those won't appear in this category.
Top pick: Air Oasis 1000 (AO1000) Air Purifier
See all: Entire House Air Purifiers
Hospital  Air Purifiers Hospital Air Purifiers — The very most effective air purifiers, regardless of power and coverage area, are the only models trusted by hospitals and labs for their blends of elite HEPA and UV or activated carbon filters.
Top pick: IQAir HealthPro Plus Air Purifier - Fast FREE FedEx Shipping!
See all: Hospital Air Purifiers
Industrial Setting  Air Purifiers Industrial Setting Air Purifiers — Trying to clean a big, industrial space? You'll need one of these: big, powerful models to hook up to central air systems OR treat over 1,000 sq. ft. of space with some combination of HEPA and charcoal or UV. Caveat emptor with the BiOzone models: they're less expensive than HEPA models and clean things like particles, bacteria, molds, and the like but may put you at risk by generating ozone (a lung irritant).
Top pick: Air Pura P600 Comprehensive Filtration Air Purifier
See all: Industrial Setting Air Purifiers
Living Room/Family Room  Air Purifiers Living Room/Family Room Air Purifiers — Small bedrooms, kitchens, offices, and living rooms will be well served by these models -- especially the high-end HEPA models from Blueair, AllerAir, Cloud 9, and Neoair.
Top pick: Blueair 201 HEPASilent Air Purifier
See all: Living Room/Family Room Air Purifiers
School or Office  Air Purifiers School or Office Air Purifiers — You're getting into some of our favorite brands in this category: Austin Air, AllerAir, Blueair, and IQAir, all highly regarded for their blends of power and efficiency. Great for larger spaces or for moderate spaces with higher ceilings, like commercial spaces, schools, and offices.
Top pick: AllerAir 5000 Exec Air Purifier
See all: School or Office Air Purifiers


Filtration Type
This is the single most important decision you need to make when choosing an air purifier; different filtration systems are best at treating different things. Read on to find your perfect filtration system...
Other  Air Purifiers Other Air Purifiers
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HEPA  Air Purifiers HEPA Air Purifiers — The building-block of most respected air purifiers, HEPA stands for High Efficiency Particulate Air, and its filters (when HEPA-certified) remove 99.97% of all particles as small as 0.3 microns. HEPA filters were originally developed by the Atomic Energy Commission for the purpose of removing radioactive dust particles; now we know they trap all manner of allergens, like pollen, dust, pet dander, and mold spores. As with other media, HEPA filters get more effective with more surface area; other important points include the quality of the casing (metal is better than plastic) and the tight fit of the filter within the machine. In high-end air purifiers, HEPA is used in combination with other filtration types: activated carbon or charcoal (for molds, gases, chemicals, VOCs, and odors) and/or UV (for viruses, germs, and microorganisms). One important note on HEPA filters: they must be replaced according to the manufacturer's standards (e.g. every two years) and should, where possible, be used in combination with a pre-filter, which blocks bigger particles and lengthens the life of the HEPA filter.
Top pick: Austin Air Healthmate Jr. HM 200 Air Purifier
See all: HEPA Air Purifiers
HEPA and Carbon  Air Purifiers HEPA and Carbon Air Purifiers — Machines that combine HEPA and activated carbon are top-notch models for treating allergens, asthma, molds, odors, VOCs, gases, smoke, chemicals, and bacteria. The more you pay, the more powerful the purifier, which means you'll filter more air over a bigger space more effectively. The entire AllerAir line combines HEPA and activated carbon; the more you spend, the more pounds of carbon you get, with blends specially engineered to treat things like MCS and cigarette smoke.
Top pick: AllerAir 5000 Exec Air Purifier
See all: HEPA and Carbon Air Purifiers
HEPA and Charcoal  Air Purifiers HEPA and Charcoal Air Purifiers — Very similar to the HEPA/carbon combo, HEPA/charcoal filters specialize in removing allergens, particles, smoke, gas, and odors. As with carbon, the more charcoal, the more effective the filtration system.
Top pick: Cloud 9 150T Air Purifier
See all: HEPA and Charcoal Air Purifiers
HEPA and UV  Air Purifiers HEPA and UV Air Purifiers — Hospitals, labs, and people with weak immune systems love the combination of HEPA filtration and a UV lamp, which changes the DNA of microorganisms, bacteria, and viruses to render them harmless. In residential settings, the UV light is a great way to attack mold -- especially in combination with carbon or charcoal. The brand that's made its name with this combination is NQ Clarifier, whose models are trusted by tons of labs and hospitals worldwide.
Top pick: AllerAir Air Tube Exec UV Air Purifier
See all: HEPA and UV Air Purifiers
Ionic  Air Purifiers Ionic Air Purifiers — Ion generators, like ozone generators, produce charged particles that cling to dust and do a good, low-maintenance, mostly silent job neutralizing things like bacteria, odors, and viruses. They're controversial, however, because they also produce ozone, which is a lung irritant and particularly troublesome for infants, asthma sufferers, and the elderly. Our favorites in this category come from Alen, which has superb filtration with minimal (or non-existent) side effects.
Top pick: Alen A350 HEPA Air Purifier
See all: Ionic Air Purifiers
Ozone  Air Purifiers Ozone Air Purifiers — They're generally quiet and low-maintenance and do a good job of eliminating viruses, bacteria, and odors, but ozone generators are controversial because they also produce ozone, which is a lung irritant and particularly troublesome for infants, asthma sufferers, and the elderly.
Top pick: Biozone 1000 Home Air Purifier
See all: Ozone Air Purifiers
Electrostatic  Air Purifiers Electrostatic Air Purifiers — Less controversial but far more high-maintenance than ion and ozone generators, electrostatic models trap particles (and often neutralize odors) with electronic cells and collection plates that have to be cleaned frequently to stay effective.
Top pick: LakeAir Excel Z Air Purifier
See all: Electrostatic Air Purifiers


Maximum Coverage Area
How big is the space you'd like to clean? You don't need to spend a ton of money to treat your car, nursery, or bedroom, but you don't want to do half the job in a bigger room. Make sure the maximum coverage area of your air purifier roughly matches the space you need to clean; if your ceilings are higher, make sure the CADR rate can keep up, or choose a model with a larger coverage area.
200-499 sq ft  Air Purifiers 200-499 sq ft Air Purifiers
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500-1000 sq ft  Air Purifiers 500-1000 sq ft Air Purifiers
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Under 200 sq ft  Air Purifiers Under 200 sq ft Air Purifiers — Great for cars, tables, desks, nurseries, and small bedrooms, this selection features small, portable models with a variety of filter types. Our favorites in this category are from Blueair, Neoair, and Amaircare, great HEPA-quality brands whose machines do not produce ozone.
Top pick: Amaircare Roomaid HEPA Air Purifier
See all: Under 200 sq ft Air Purifiers
Over 1000 sq ft  Air Purifiers Over 1000 sq ft Air Purifiers
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Promotions
Editor's Choice  Air Purifiers Editor's Choice Air Purifiers
Top pick: AirFree P1000 Air Sterilizer and Purifier - Ionic and Ozone Free Air Purifier
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Top Sellers  Air Purifiers Top Sellers Air Purifiers
Top pick: Friedrich C-90B Electronic Air Cleaner
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On Sale  Air Purifiers On Sale Air Purifiers
Top pick: Air Oasis 3000 Xtreme (AO3000X) Air Purifier
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Free Shipping  Air Purifiers Free Shipping Air Purifiers
Top pick: Austin Air HealthMate Plus Air Purifier
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