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Best Air Purifiers Top RatedWhat are the best air purifiers to clean the air in your home, apartment, or office?

You’ll find out here.

The experts at Home Air Quality Guides have done all of the in-depth research and testing on room air purifiers so you don’t have waste countless hours trying to find the top air purifier for your needs.

“While many air purifiers are good for dust, pollen, mold, smoke, and other indoor pollutants, it can be hard to know which model to choose,” says Patrick Holmes, lead indoor air quality specialist. “So we made the most detailed list of the best rated air purifiers you can trust to help you breathe easier.”

No matter which air cleaner you choose in our air purifier reviews below, you’ll end up with an effective air purifier that works well to remove particles and allergens from your indoor air.

We hope this list of the top air purifiers is exactly what you’re looking for and that it helps you get the most value for your money on a new home air cleaner.

Now, let’s get on to the list of the best air purifiers on the market for you to consider.

Disclosure: Home Air Quality Guides is reader-supported. As an Amazon Associate, we earn from qualifying purchases made through the links on our site. Learn more.

Best Air Purifiers Reviewed in this Guide

Here’s a quick comparison chart showing the top rated air purifiers. We’ll cover each aspect of these units in the reviews section below, but this gives you an idea of what’s available and an easy way to compare them.

ImageAir Purifier DetailsPrice
Rabbit Air MinusA2 Air Purifier
  • Best overall air purifier
  • Filters: Pre-filter, Medium, BioGS, Activated Carbon, Customized, Ionizer
  • Coverage: 700 sq. ft.
  • Warranty: 5 years
Check Price
Levoit LV-H132 Air Purifier
  • Cheapest option
  • Filters: Pre-filter, True HEPA, Activated Carbon
  • Coverage: 86 sq. ft
  • Warranty: 2 years
Check Price
Honeywell HPA300 Air Purifier
  • Top choice for allergies
  • Filters: Pre-filter, True HEPA, Activated Carbon
  • Coverage: 465 sq. ft.
  • Warranty: 5 years
Check Price
Winix 5500-2 Air Purifier
  • Patented air cleaning technology
  • Filters: Pre-filter, True HEPA, Activated Carbon, PlasmaWave
  • Coverage: 360 sq. ft.
  • Warranty: 2 years
Check Price
AIRMEGA 400S Smart Air Purifier
  • Best smart air purifier
  • Filters: Pre-filter, True HEPA, Activated Carbon
  • Coverage: 1,560 sq. ft.
  • Warranty: 5 years
Check Price
Blueair Blue Pure 411 Air Purifier
  • Colorful budget air cleaner
  • Filters: Pre-filter, HEPASilent, Activated Carbon
  • Coverage: 161 sq. ft.
  • Warranty: 1 year
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Molekule Air Purifier
  • Most advanced air cleaning technology
  • Filters: Pre-filter, PECO nanotechnology
  • Coverage: 600 sq. ft.
  • Warranty: 2 years
Check Price
Coway Mighty Air Purifier
  • Top energy-saver
  • Filters: Pre-filter, True HEPA, Activated Carbon, Ionizer
  • Coverage: 361 sq. ft.
  • Warranty: 3 years
Check Price
Medify MA-40 Air Purifier
  • Highest-grade HEPA filter
  • Filters: Pre-filter, H13 True HEPA, Activated Carbon, Ionizer
  • Coverage: 800 sq. ft.
  • Warranty: Lifetime
Check Price
Alen BreatheSmart 75i Air Purifier
  • Customizable HEPA filter
  • Filters: Pre-filter, Various HEPA Versions, Ionizer
  • Coverage: 1,300 sq. ft.
  • Warranty: Lifetime
Check Price
Bonus Review: IQAir HealthPro Plus Air Purifier
  • For severe allergies or asthma
  • Filters: Pre-filter, HyperHEPA, V5 Cell Gas and Odor
  • Coverage: 1,125 sq. ft.
  • Warranty: 10 years
Check Price
Bonus Review: Dyson Pure Cool Link Air Purifier
  • Cools and purifies the air
  • Filters: True HEPA, Activated Carbon
  • Coverage: 300 sq. ft.
  • Warranty: 2 years
Check Price

Top 10 Best Air Purifiers List

Top Air Purifier1. Rabbit Air MinusA2 Air Purifier

If we had to pick the best air purifier out of all of the others on this list, this would be the clear winner.

We consider it the best rated air purifier available due to its wide range of features and air cleaning power.

The MinusA2 offers an unmatched 6-Stage Air Filtration System that creates the cleanest, freshest air possible.

This includes:

  1. Pre-filter: To capture the largest particles and prolongs the life of the other filters.
  2. Medium Filter: Traps large allergens and dust particles.
  3. BioGS HEPA Filter: Extra-long life version of a True HEPA Filter that captures the tiniest of all allergens, dust, pollen, and mold particles (99.97% down to 0.3 microns). Lasts up to 3 years.
  4. Activated Carbon Filter: Eliminates odors and chemical vapors.
  5. Customized Filter: Let’s you customize the product to suit your specific needs. Choose between enhanced germ defense, toxin absorption, pet allergies, or odor elimination.
  6. Ion Generator: Creates an ionic field to neutralize airborne contaminants without producing ozone.

Another reason this is the overall best room air purifier is the fact that you can customize the front panel in both color and design. Many different artistic design choices are available to suit your taste and style.

And, since it’s wall-mountable, this air cleaner can be camouflaged as a piece of art inside a room.

Room size coverage is also excellent at 700 square feet, which covers most areas in the home.

There are also two other versions available if you want a slight boost in air cleaning coverage and/or smart Wi-Fi controls to control it from your mobile device:

The only downside is that this is one of the more expensive options out there. If you can afford it; however, we highly suggest that you invest in this air purifying machine because it has everything you need to protect your health.

Check Price and Reviews

More Specifications:

Room Size: 700 sq. ft. | Filters: Pre-filter, Medium, BioGS, Activated Carbon, Customized, Ionizer | CADR (Pollen/Dust/Smoke): 171 cfm/173 cfm/166 cfm | Noise Level: 20.8 to 45.6 dBA | Warranty: 5 years


2. Levoit LV-H132 Compact Air Purifier

This Levoit compact air purifying device is a great buy for anyone who is looking for convenience.

Its small size makes it ideal for both personal air purification use at home or at work and while traveling.

The major advantage of this top rated air purifier is that it uses a 3-Stage Air Filtration System that includes a True HEPA Filter, Activated Carbon Filter, and Pre-filter.

This room air purifier also includes a nightlight with two brightness settings, which makes it a great air cleaning device for the bedroom.

Since it’s geared for personal use, this compact home air cleaner can only purify a space up to 86 square feet. However, that also makes it a great deal.

This air purifier also comes two additional sizes if you need more coverage for an average to large size room:

Just choose the best home air purifier model that’s right for you.

Each one offers the same powerful level of air filtration for getting clean air where you need it most.

Check Price and Reviews

More Specifications:

Room Size: 86 sq. ft. | Filters: Pre-filter, True HEPA, Activated Carbon | CADR (Pollen/Dust/Smoke): 110 cfm/110 cfm/110 cfm | Noise Level: 36 to 50 dBA | Warranty: 2 years


3. Honeywell HPA300 True HEPA Air Purifier for Allergies

If you weren’t already aware of this fact, Honeywell is the #1 brand recommended by allergists.

Therefore, it’s no surprise that this portable air purifier for allergies made it onto our top air purifiers list.

Like many of the other best air purifiers on this page, this product uses a powerful True HEPA filter and Activated Carbon filter to clean the air of dust, allergens, smoke, and odors.

It can handle a very large space up to 465 square feet.

Our favorite features; however, are the automatic shut off timer with 2, 4, and 8-hour intervals; easy tap control buttons; and turbo fan mode.

It’s also one of the quietest air purifiers ever tested at its highest speed too.

Our only complaint used to be that the filter replacements were too costly, but now they’ve become quite affordable. The estimated cost is around $40 for a 3 pack.

Check Price and Reviews

More Specifications:

Room Size: 465 sq. ft. | Filters: Pre-filter, True HEPA, Activated Carbon | CADR (Pollen/Dust/Smoke): 300 cfm/320 cfm/300 cfm | Noise Level: 43 to 61 dBA | Warranty: 5 years


4. Winix PlasmaWave 5500-2 Air Purifier

This Winix model is a top air purifier because it uses a patented PlasmaWave technology not found in other air purifiers.

This innovative feature offers the same air cleaning advantages of an ionizer but doesn’t produce harmful side effects or ozone.

PlasmaWave is the safest technology of its kind on the market, and for the price, this is the best air purifier under $200.

Not only does it use a True HEPA filter to remove 99.97% of dust and allergens from your home, but the PlasmaWave technology goes one step further to eliminate other toxic contaminants.

Research shows that PlasmaWave is a safe method of killing airborne bacteria, viruses, and other germs that doesn’t irritate your allergies or cause asthma symptoms. (Something that ionic air purifiers are guilty of producing.)

An Activated Carbon filter is also included to help reduce smells and smoke.

The most notable feature; however, is that this air cleaner includes a Smart Sensor that monitors the air quality within a room and automatically adjusts the fan speed to maximize the air cleaning power.

Finally, this Winix air purifier is capable of handling large rooms up to 360 square feet, which is perfect for most rooms of the house or office settings.

Check Price and Reviews

More Specifications:

Room Size: 360 sq. ft. | Filters: Pre-filter, True HEPA, Activated Carbon, PlasmaWave | CADR (Pollen/Dust/Smoke): 246 cfm/243 cfm/232 cfm | Noise Level: 26.6 to 60 dBA | Warranty: 2 years


5. AIRMEGA 400S Smart Enabled Air Purifier

This product ranks high on the list of best rated air purifiers because it offers a combination that not many other devices provide: Smart Wi-Fi features and large room size coverage.

What makes this product so popular is the fact that you can control every aspect of it from your iOS or Android device.

It also has a real-time air quality monitoring system so you know exactly how fresh or polluted the air is around you indoors.

A colored ring of light on the unit changes from blue (good air quality) to red (poor air quality) and various shades in between. You can also see this information on the mobile app.

This unit uses an advanced set of air filters—True HEPA and Activated Carbon—that are capable of capturing 99% of volatile organic compounds (VOCs) and 99.97% of all other pollutants. That rating is one of the best in the industry.

Another upside to this room air purifier is that the maximum air purifying coverage is 1,560 square feet, which is good for every home or office application. No room is too large for this air purifier.

If you want something a bit smaller, another version is also available:

Additionally, this unit comes in two color choices: white and graphite.

The only downside is that all of these benefits add up.

This air purifier costs more than others listed on this page, but you may find that it’s worth every penny because of its advanced air cleaning capabilities, large room size coverage, and smart Wi-Fi controls.

Check Price and Reviews

More Specifications:

Room Size: 1,560 sq. ft. | Filters: Pre-filter, True HEPA, Activated Carbon | CADR (Pollen/Dust/Smoke): 260 cfm/260 cfm/260 cfm | Noise Level: 22 to 52 dBA | Warranty: 5 years


6. Blueair Blue Pure 411 Air Purifier

If you’re looking for a simple, user-friendly air cleaner for home use that only requires the touch of a single button to clean your air, then this is a good unit to consider.

The 3-Stage Air Filtration System starts with a colorful and washable pre-filter that captures larger particles like dust, hair, and dirt. It comes with two colors: dark blue and grey, and other colors can be purchased separately.

Next, air passes through a HEPASilent filter that’s electrically charged to cause pollutants like allergens, mold spores, and other irritants to stick to the filter fibers.

Finally, air goes through an Activated Carbon filter to extract airborne odors and smoke particles to make the room smell fresh.

Air is filtered from all sides of this air purifier, making it a 360-degree air cleaning unit that has less clogging, higher airflow, and lower noise levels.

It’s one of the best budget air purifiers for small spaces up to 161 square feet and cleans the air at an impressive rate: 5 times per hour.

If you want larger room size coverage, another model is also available:

One other thing to note is that this air purifier has been independently tested and certified from the Association of Home Appliance Manufacturers (AHAM). That means it’s one of the most efficient air purifiers available.

Also, the HEPASilent filtering technology captures at least 99.97% of airborne particles down to 0.1 microns in size and helps to kill germs. This creates a more sterile and healthy room environment.

This is a solid investment for anyone who wants clean air and will continue to rank high on our top 10 air purifiers list.

If we had to give one complaint though, it would be that we wished you could choose the color of the pre-filter during the initial purchase. Blueair doesn’t offer that option, so you have to buy an extra pre-filter to get the color you like best.

Check Price and Reviews

More Specifications:

Room Size: 161 sq. ft. | Filters: Pre-filter, HEPASilent, Activated Carbon | CADR (Pollen/Dust/Smoke): 120cfm/120cfm/105cfm | Noise Level: 17 to 46 dbA | Warranty: 1 year


Molekule Air Purifier7. Molekule Air Purifier

This is one of the top air purifiers you can buy today that actually destroys (not traps) pollutants.

Unlike most other air purifiers that use HEPA filters to collect particulates from the air, the Molekule air purifier actually removes indoor contaminants and then destroys them at the molecular level.

This unit does this by using a Dual-Filtration System:

  • The Pre-filter catches larger pollutants like dust, pollen, and pet dander.
  • The PECO filter uses nanotechnology to eliminate all other types of airborne pollutants that are 1,000 times smaller than the average air purifier can capture in a HEPA filter.

You can’t get much better than that for an air cleaner for home use.

A few other features that make this air purifier a good deal include:

  • 360-Degree air intake pulls in pollutants from all sides.
  • Leather handle lets you easily move it from room to room.
  • Touch screen display allows you to make quick adjustments to the fan speeds and automatic modes.
  • Wi-Fi connectivity gives you added control with your iPhone or Android device.
  • Aluminum case adds modern style and elegance to any room.

As for room size coverage, this home air purifier can cover large rooms up to 600 square feet, which is exceptional.

If you want a smaller version of this device, you do have another option:

If we were to give one criticism against this room air purifier, it would be that you’re locked into using Molekule’s proprietary PECO filters. You can’t buy a third-party filter that will work in this unit like you can with other air purifiers that use HEPA filters.

But even with that brand attachment, many people find this to be the best air purifier for their needs because it has such powerful air cleaning technology.

Check Price and Reviews

More Specifications:

Room Size: 600 sq. ft. | Filters: Pre-filters, PECO | CADR (Pollen/Dust/Smoke): Not Available | Noise Level: 41 to 65 dBA | Warranty: 2 years


8. Coway Mighty Air Purifier AP-1512HH

Month after month, this continues to be one of our top picks as the best home air purifier you can buy for personal use.

Why is it so highly rated?

Mainly due to these reasons:

  • 4-Stage Air Purification System: Includes a Pre-filter, True HEPA Filter, Activated Carbon Filter, and Ionizer to eliminate the widest range of pollutants and odors.
  • Eco Mode: Unlike other air purifiers that run 24/7 even when the air is fresh, this product cuts off when it senses the air is clean—making it extremely energy efficient.
  • Long Filter Life: The HEPA Filter is outstanding and lasts up to one year. The Activated Carbon Filter is good for about 6 months before a replacement is needed.
  • Two Color Choices: Black or White.

In numerous tests, the Coway Mighty Air Purifier has proven to be excellent at not only removing dust and allergens but also reducing household odors, mold, and bacteria.

Plus, it has enough power to handle a large space up to 361 square feet.

The only real negative aspect of this air purifier reviewed here is that the air quality sensor light on the top of the unit can’t be turned off.

If you find that the light is too bright at night, then you may want to cover it with a piece of black tape or cardboard.

Other than that, it’s the best value air purifier you can buy today.

Check Price and Reviews

More Specifications:

Room Size: 361 sq. ft. | Filters: Pre-filter, True HEPA, Activated Carbon, Ionizer | CADR (Pollen/Dust/Smoke): 240 cfm/246 cfm/223 cfm | Noise Level: 24.4 to 53.8 dBA | Warranty: 3 years


9. Medify MA-40 Air Purifier

What makes this product so attractive is the fact that it uses a 4-Stage Air Cleaning System with the highest grade HEPA filter available.

This powerful air purifier tackles pollutants of all types—making the room it’s placed in a much healthier environment.

The 4-Stage Air Cleaning System includes:

  • Pre-filter: For trapping the largest particles and extending the life of the other air filters.
  • Medical Grade H13 HEPA Filter: A higher grade filter than a standard True HEPA filter. It captures 99.95% of microscopic allergens, dust, and mold spores down to 0.1 microns in size. Research shows that this is the optimal filter choice for people who suffer from allergies or asthma.
  • Activated Carbon Filter: Reduces odors caused by pets, smoke, and cooking, so rooms smell fresh. Also eliminates airborne chemicals and gases like formaldehyde.
  • Ionizer: Produces negative ions to improve the efficiency of the internal air filters and revitalizes the air.

This air purifier is excellent for large areas and can purify a space up to 840 square feet. But, you can make it even more efficient by using it in a smaller room that’s around 400 square feet.

If you do that, you can boost the air cleaning power by recycling the full volume of air every 15 minutes.

This air purifier does; however, come in two other sizes to meet your air cleaning needs:

Two other things worth pointing out is that this air purifier also comes with a PM2.5 Particle Sensor and Air Quality Indicator Light.

According to experts, PM2.5 is the most harmful type of airborne pollution you can breathe and the indicator light changes from Blue (Good) to Green (Moderate) to Red (Poor) to let you know the current state of the air in your home or office.

Check Price and Reviews

More Specifications:

Room Size: 840 sq. ft. | Filters: Pre-filter, H13 True HEPA, Activated Carbon, Ionizer | CADR (Pollen/Dust/Smoke): 370 cfm/370 cfm/370 cfm | Noise Level: 20 to 66 dBA | Warranty: Lifetime


10. Alen BreatheSmart 75i Air Purifier

If you’re looking for a fully customizable air purifier that can also handle a very large space, then you’ve finally found it.

Similar to our #1 best room air purifier above, this Alen BreatheSmart 75i air purifier offers some good options:

  • 4 True HEPA Filter Types: To meet your specific air quality needs. Choose between Pure (allergies), Silver (asthma), FreshPlus (smoke and heavy chemicals), and OdorCell (pet and baby odors).
  • Multiple Front Panel Colors and Designs: To match your personal style and fit in with your existing home décor or office space. Includes white, blue, graphite, oak, rosewood, espresso, and more.

Another top feature is the Smart Sensor with a colored Air Quality Light Indicator. It measures the pollutants in the air and automatically adjusts the air cleaning power to save on energy and extend filter life. The color changes between five different colors to indicate the current indoor air quality.

This air purifier is also one of the most powerful on this list too.

It can clean the air within a room up to 1,300 square feet, making it the perfect device for a large room, a basement, or even an office.

While the price is a little higher than other products in our air purifier reviews list, it does make a great investment if you want a truly personalized air purifying device without any complicated features.

For that reason, it’s tough to beat.

Check Price and Reviews

More Specifications:

Room Size: 1,300 sq. ft. | Filters: Pre-filter, Various HEPA Versions, Ionizer | CADR (Pollen/Dust/Smoke): 347 cfm/347 cfm/347 cfm | Noise Level: 25 to 49 dBA | Warranty: Lifetime


BONUS Air Purifier Reviews

IQAir HealthPro PlusIQAir HealthPro Plus Air Purifier

Perhaps you’re looking for a medical-grade air purifier that’s designed specifically for people with severe allergies and asthma.

If that’s the case, then the IQAir HealthPro Plus model is the machine you need.

What makes this unit excellent for anyone who wants the cleanest, freshest air possible in any room of the home include:

  • Advanced HyperHEPA Filter: Captures 99.95% of particles down to 0.003 microns—the smallest that exists. It also lasts up to four years.
  • V-5 Cell Gas and Odor Filter: Captures toxic gases and odors from volatile organic compounds (VOCs), automobile exhaust, paints, carpeting, furniture, formaldehyde, and carbon monoxide. It lasts up to two years.

If you want the best air purifier for large rooms up to 1,125 square feet that has super-long lasting filters, this is the one to buy.

It’s hard to find anyone who doesn’t like this air purifier once they try it—the reviews speak for themselves—and it’s built to last a lifetime of use.

Check Price and Reviews

More Specifications:

Room Size: 1,125 sq. ft. | Filters: Pre-filter, HyperHEPA, V5 Cell and Odor | CADR (Pollen/Dust/Smoke): Not Available | Noise Level: 25 to 59 dBA | Warranty: 10 years


Dyson Pure Cool Link Air Purifier

If you’re looking for an air purifier that can serve two purposes: cleaning the air and cooling you down, then this unit could be exactly what you need.

We didn’t include it on our top 10 list of air purifiers because not everyone needs a cooling device in addition to an air purifier.

However, we wanted to give you this bonus review in case this product appeals to you.

Here are the top features of this room air cleaner:

  • True HEPA Filter: Captures 99.97% of microscopic particles down to 0.3 microns in size. This includes allergens, dust, mold spores, bacteria, and particulate matter (PM2.5).
  • Activated Carbon Filter: Removes Volatile Organic Compounds (VOCs) and household odors from cooking, pets, and smoke.
  • Cooling Fan: Blows cold air with a bladeless design.
  • Automatic Mode: It monitors the air quality and adjusts itself automatically to filter out contaminants.
  • Wi-Fi and Voice Control: Lets you control the air purifier from any iOS or Android device to view air quality reports in real-time and set up air cleaning schedules. It can also be synced up with a smart home device like Amazon Alexa.
  • Oscillation: This feature rotates the fan from side to side so that purified and cooled air can be more evenly distributed through the room.
  • 300 Square Feet: Good for medium size rooms.

There’s also a model that includes a heating function if you want something to keep you warm during the winter:

As you can see, this air purifier is one-of-a-kind and can meet all of your air cooling and air purification needs throughout the year.

Check Price and Reviews

More Specifications:

Room Size: 300 sq. ft. | Filters: True HEPA, Activated Carbon | CADR (Pollen/Dust/Smoke): Not Available | Noise Level: 40 to 56 dBA | Warranty: 2 years


Buying Guide for Air Purifiers

Not everyone has the time or desire to sift through numerous air purifier reviews in order to discover which brand or model is the top choice or the right fit.

Therefore, this page was specially created to help people like you find the right air cleaner for your needs in a quick and efficient manner.

We hope that this list of the best home air purifiers has been a valuable reference for you and that the detailed information above for each recommendation was sufficient to help you make a good buying decision.

If you want to learn more about any air purifier brand or model on this page, you can find additional information in our air purifier product reviews section: compare air purifiers.

Every air purifier on this top ten list has been thoroughly rated, reviewed, and compared to its closest competitor on our site and a complete list of brands and models can be found in that section.

Top Air Purifier Brands Featured on this List

Best Home Air Purifier Brands

CARB Certified Air Purifiers

All of the air purifiers listed on this page are certified by the California Air Resources Board (CARB).

CARB is the primary state agency that takes action to protect human health from the harmful effects of air pollution.

To be certified by the CARB, an air purifier must meet a strict standard for ozone emission concentration, 0.050 parts per million or less, and prove to be electrically safe.

No matter which air purifier you choose on this list, you’re getting a high-quality device that’s thoroughly examined for your safety.

Asthma and Allergy Friendly Certification

The Best Air PurifierThe Rabbit Air MinusA2 and Dyson Pure Cool Link are the only air purifiers that have been certified “Asthma and Allergy Friendly” by the AAFA (Asthma and Allergy Foundation of America) and the ASL (Allergy Standards Limited).

The Asthma & Allergy Friendly® program is a voluntary program that tests and certifies consumer products to improve the air quality and health of homes.

This certification mark is independently awarded and created by medical experts.

More than 40 companies across a variety of industries have had their products certified through the program (e.g. bedding, flooring, air purifiers, vacuum cleaners, etc.).

The purpose of the program is to offer consumer confidence and trust that products have been rigorously tested by a certified lab to meet a strict set of guidelines for people with asthma and allergies.

Best Home Air Purifier Terminology and Definitions

Along with each air purifier recommendation, we tried our best to include a brief explanation of the standout features that make each device worth considering.

For some people, those details are all they need to make a wise decision, but for others, they may want to know more about what a particular feature means.

Below is a list of all of the common terminology you’ll find when comparing air purifiers and their definitions.

Room Air Purifier Filter Types

Pre-filter – An essential feature of air purifiers that use a HEPA style filter. The pre-filter prolongs the life of the main filter by preventing large particles from damaging it and wearing out the filter faster. Most pre-filters are washable and reusable and last a lifetime.

True HEPA Filter – This is the highest standard air filter you can get for an air purifier. In order to carry this label, the filter must meet strict regulations set by the United States Department of Energy (DOE) and capture at least 99.97% of particles as small as 0.3 microns. A True HEPA filter also captures PM2.5, a substance that the Environmental Protection Agency (EPA) considers the greatest risk to health among particulate pollution. Particles that are smaller than 2.5 microns can deeply penetrate the lungs and enter the bloodstream.

BioGS HEPA Filter – This filter is a more advanced version of the True HEPA filter. It’s specially designed to reduce the build-up of particles on the filter that degrade it over time. If maintained properly, a BioGS HEPA filter can last anywhere between 18 months to 3 years.

HEPA-type Filter – This filter is a lower quality version of a True HEPA filter and doesn’t meet the standards set in place by the U.S. DOE mentioned above. It could capture particles as small as 1 micron, 2 microns, 5 microns or larger. To know for sure, you must read the fine print on the product specifications.

Activated Carbon Filter – This filter is very porous and has a large surface area, which gives it the capability to absorb odorous particles and gases. No other filter can remove the smells produced by smoke, pets, cooking, chemicals, mold, etc. as well as this one.

Ion Generator (or Ionizer) – This technology emits negative ions into the air as a way to clean it. Particles like dust, bacteria, and allergens are positively charged and these negative ions form a bond with them. Once bonded, those contaminants become too heavy to stay in the air. Ionizers don’t require filter replacements, because they don’t use them; however, some products do have electrostatic collection plates that collect these fallen particles. Electrostatic collection plates can be washed and reused.

Electrostatic Collection Plates – See definition for Ion Generator (or Ionizer).

UV-C Light – The UV in UV-C stands for “Ultra Violet.” Ultra Violet light is part of the electromagnetic spectrum that makes up electromagnetic radiation, which includes light, radio waves, and x-rays. UV-C is a sub-band of UV light and is a powerful form of radiation that kills microorganisms, but is completely harmless to humans.

PlasmaWave Technology – This technology safely destroys airborne pollutants without causing harmful ozone. As filtered air is leaving the air purifier unit, it passes through a type of electric pulse that creates positive and negative ions. This puts air in a plasma state. Once this plasma combines with water vapor, it forms hydroxyl radicals. Hydroxyls attack pollutants like germs, bacteria, viruses and chemical gases, and once destroyed, the hydroxyls reform into harmless water vapor.

Photo Electrochemical Oxidation (PECO) – This is a photon-based air purification process that works in conjunction with an Ultra Violet Light to oxidize chemicals and destroy volatile organic compounds, bacteria, mold, fungi, and allergens. PECO technology is only found in the brand of Molekule air purifiers.

Ozone (O3) Ozone is a highly reactive molecule that is known for killing bacteria and viruses and removing odors. However, the same chemical properties that allow it to react with organic material outside of the body is the same thing that can cause it to harm human health. High levels of ozone exposure can cause decreased lung function, chest pain, shortness of breath, coughing, and irritation of the throat. Some air cleaners are called “ozone generators” and are used for commercial air sterilization when people are not present inside a building. Other air purifiers that use ionization or UV-C lights can emit trace levels of ozone as a by-product. But if the air purifier is CARB certified, then the ozone emission concentration is 0.050 parts per million or less which is safe for human exposure.

Common Air Purifier Features

Clean-Cel Anti-Bacterial Treatment – This treatment prevents the growth of bacteria, mold, and fungi on an air filter. This extends the life of the filter and reduces odors caused by these microorganisms.

Smart Sensors – These sensors monitor the air quality within a room and tell the air purifier how to adjust itself in order to eliminate the pollutants. Commons types of smart sensors include ones for dust and odors. When high levels of either of these contaminants are detected, the air purifier will adjust the fan speed automatically to reduce them.

Light Sensor – This sensor monitors the light levels inside a room. When it gets too dark, the light sensor triggers the air purifier to go into sleep mode.

Sleep Mode – This mode puts the air purifier in a quieter and more energy-efficient operation cycle for night time use. It’s best for air purifiers in bedrooms where low noise and decibel levels are appreciated.

Smart Wi-Fi Connectivity – This allows the air purifier to be controlled by a mobile device with an iOS or Android operating system through an associated app. The Wi-Fi connectivity is through Bluetooth. Smart air purifiers let you set up schedules and timers and track the degradation of the filters. Some apps also include real-time monitoring of air quality, which lets you see how good or bad the air is inside your home at any given moment.

Filter Replacement Indicators – These are lights that alert you for when it’s time to replace the filters inside the air purifier. Having clean air filters is essential for effective air purification.

Types of Air Purifier Ratings

CADR Rating – This abbreviation stands for Clean Air Delivery Rate and it was developed by the Association of Home Appliance Manufacturers (AHAM). The CADR ratings for an air purifier come from a set of strict lab tests performed by the AHAM. There are CADR ratings for three common airborne particles: dust, pollen, and smoke, and the CADR measurements refer to CFM (short for Cubic Feet per Minute) which is the velocity at which air flows into the unit. Example CADR ratings on an air purifier would be 300 dust, 320 smoke and 300 pollen (or other similar figures). The best air purifiers have CADR numbers that are equal to at least two-thirds of the room size coverage the unit can handle

ACH Rating – This abbreviation stands for Air Changes Per Hour and this rating tells you how often the air purifier can exchange the full volume of air inside a room. For example, an air purifier with a 4x ACH rating means that the unit can swap the existing room air with clean air four times every hour or every 15 minutes. The most common ACH ratings you’ll find on air purifiers are 2x, 3x, 4x and 5x ACH.

How to Set Up and Use Your New Air Purifier

Buying a new air purifier is the first step to getting clean air and improving your health.

But to get the most out of your air purifier, you’ll need to set it up properly, operate it the right way, and perform some minor maintenance to keep it working well.

Here’s a list of how to set up, use, and maintain your air purifier:

Remove the Filter Wrappers – Most air purifiers come with the filters already installed inside the unit. But, many of these filters are also wrapped and sealed in plastic. If you don’t remove the plastic covering before turning on the air purifier, it won’t work correctly. So be sure to open up the machine’s filter panel and look to see if the filters are wrapped up. If so, unwrap them and reinstall them in the same order that you took them out.

Place it in the Right Location – All air purifiers need room to “breathe”. If you install your device too close to the wall or other solid objects, it won’t circulate the air properly. The best place to put your new air purifier is near the center of the room. That will give it enough space to draw the maximum amount of air into the unit. Also, keep the unit at least 24 inches from a wall and any furniture. Otherwise, the airflow may be constricted.

Use One Air Purifier Per Room – Air purifiers work best in an enclosed space. And, they can’t work through walls. If you want to clean the air in more than one room, it’s best to get a dedicated air purifier for each of those rooms. The other option is to take a single air purifier around the house with you. Many air purifiers are lightweight and include a handle for easy transport; however, it’s not always practical to cart a unit with you throughout the home. So, consider getting more than one unit to place in the rooms you frequent most, like the living room and bedroom(s).

Get the Right Size Unit – Every air purifier has a maximum room size that it can handle. This specification is labeled as the square footage rating. The total room coverage is based on the CADR ratings for pollen, dust, and smoke. Therefore, you always want to get a unit that can meet or exceed the size of the room you want to use it in. It’s better to have an overpowered air purifier than an underpowered device. To find the square footage size of a room, just measure the length and width (in feet) and multiply those two numbers together. For example, a 10′ x 20′ room would be 200 square feet.

Keep it Running 24/7 – To get the most benefit out of your air purifier, you should always keep it running. The more times an air purifier can recycle the same air inside a room, the cleaner the air gets. The best air purifiers come with an automatic setting that takes all of the guesswork out of how to operate the unit. When set on this mode, the air purifier will monitor the air quality and adjust itself automatically to get rid of the airborne particles. If a few particles are detected, the unit will run on the lowest fan speed setting. If a large number of particles are sensed, then it will kick into a higher fan speed setting to remove those pollutants. And once the air is clean, the unit will drop back down the lowest fast speed. This process ensures that your device uses the least amount of energy while giving you the cleanest air possible to breathe.

Keep Windows and Doors Closed – In addition to running your air purifier all the time, you should also keep the windows and doors closed in the room that you’re using the device. If a window or door is left open then the unit will constantly be drawing in unfiltered air. With the windows and doors closed, the air purifier can recycle the same volume of air over and over again until the most number of airborne particles are filtered out. If you ever have to leave the room for any reason, you can open the door for that purpose. Just close it behind you.

Clean the Pre-Filter – Most of the top air purifiers include a pre-filter. Some are permanent while others need to be replaced. To get the best performance out of your air purifier and to keep the other filters lasting longer, you’ll want to vacuum or rinse off the pre-filter every 30 days to keep it in good condition. The pre-filter catches the largest particles, like hair and dirt, so the other internal filters, like a HEPA filter, can work unobstructed on the microscopic particles.

Keep Up with Filter Replacements – As your air purifier runs, it collects airborne pollutants. And over time, these filters get saturated with particles. So, you’ll need to replace the filters every so often. It’s best to follow the manufacturer’s recommendation for the filter replacement timeline, but many of the best air purifier models include a filter replacement indicator on the appliance. This light comes on when it’s time to replace the filter so you don’t have to guess when to do it.

More Top Air Purifier Reviews

The Best Air Purifier for Specific Needs

In our list of the best room air purifiers above, we tried to give you a glimpse of what each unit’s specialty is and why it stands out as a top choice.

As you discovered in our air purifier reviews, the products on this page are truly the best of the best.

But, if you’re looking to find a portable air purifier for a specific need and want to know what all of your options are in this regard, we also have several guides that are written for that very purpose.

More Air Purifier ReviewsTake a look at our topic-focused articles below to find out more about the best air purifiers for specific reasons: