8 Best Air Purifiers In 2020 (+Specs) | LearnMetrics

Who doesn’t have an air purifier nowadays?

With the best air purifiers, you can filter out the dust parts, mold spores, even cigarette smoke. What sounded like science fiction 20 years ago is the new reality in 2020. And it’s easy.

The filter technology is the essence of air purifiers.

It’s no wonder that every other household in the US has one of these air purification devices. Clean air doesn’t only protect your lungs; it’s designed to minimize the chances of mold or mildew development in your household.

As with every device, you’ll find both good air purifiers as well as bad air purifiers. When trying to find the best air purifier, you basically need to check 2 key characteristics:

  1. Filters. The nature, number, and quantity of filters that catch unwanted air particles are the core of every air filtration system. The advanced filters that all good air purifiers have are HEPA filters and carbon filters. Next-gen filters (equally good, if not better) include PECO filter and UV filters, for example.
  2. How much air can the air purifier clean per hour? This is, in essence, the capacity of the air purifier. For big rooms, you will need a powerful +50W purifier. For smaller ones, even 30W purifiers could be enough. Every air purifier comes with ‘Purifiers room sizes of up to 100-700 sq ft’. Hidden behind this number are specifications like Airflow (measures in CFM), CADR (Clean Air Delivery Rate measured in CFM), ACH. In the end, however, it basically all comes down to the power (wattage) and energy efficiency of air purifiers.

Other metrics to take into account when choosing the best air purifier are noise levels (should be below 60 dB), the number of fan speeds, and weight (chunky air purifiers can weigh 20 lbs or more).

Based on these metrics, you can evaluate which air purifiers are not only good but brilliant. We’ve done just that.

Below you will find a list of the best air purifiers according to all these specifications, safe for one. That one – the one you have to evaluate for yourself – is the aesthetics.

All the air purifiers are beautiful as far as specifications are concerned. Everyone, however, does have his or her own taste.

You should also have in mind the room where the air purifier you’re buying is going to be situated.

Some people go for the classic look, some go for the avant-garde extravagance.

Based on your taste and the interior design consideration you should pick the most aesthetic purifier for your home:

List Of 8 Best Air Purifiers Based On Specifications

Air PurifierImportant Specs:
#1 Alen BreatheSmart FLEX Silver

4.7 out of 5 stars
Check on Amazon
Room size: Up to 700 sq ft
ACH: 2
Filters: High Capacity HEPA (0.3 μm)
Airflow: 53, 135, 147, 187 CFM
39, 42, 49, 55 dB
Power: 50W
Fan Speeds: 4
Weight: 15.0 lbs
#2 Blueair Blue Pure 211+

4.5 out of 5 stars
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Room size: Up to 540 sq ft
ACH: 5
Filters (3): Prefilter, Carbon filter, Particle filter
Airflow: (Estimated) 350 CFM
Noise: 31 to 56 dB
Power: 61W
Fan Speeds: 3
Weight: 13.0 lbs
#3 Molekule Air

4.3 out of 5 stars
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Room size: Up to 600 sq ft
Filters (2): Prefilter,
PECO Superfilter
Power: 85W
Fan Speeds: 3
Noise Levels: 30-55 dB
Weight: 18.0 lbs
+ iOS & Android app
#4 Coway AP-1512HH

4.6 out of 5 stars
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Room size: Up to 361 sq ft
Filters (4): Prefilter, Deodorization filter, True HEPA filter, Vital Ion filter
Airflow: 268 CFM
Noise: 24.4 to 53.8 dB
Power: 77W (120V, 0.64A)
Fan Speeds: 3
Weight: 12.8 lbs
#5 Pure Enrichment PureZone 3-in-1

4.7 out of 5 stars
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Room size: Up to 200 sq ft
Filters (4): Prefilter, Carbon filter, True HEPA filter, UV filter
Airflow: NaN
Noise: 30, 40, 50 dB
Power: 60W (120V, 0.5A)
Fan Speeds: 3
Weight: 6.0 lbs

4.4 out of 5 stars
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Room size: 129 sq ft effective range
ACH: 4
Filters (3): Prefilter, Carbon filter, True HEPA filter
Airflow: NaN
Noise: 25-50 dB
Power: 28W (120V, 0.23A)
Fan Speeds: 3
Weight: 6.6 lbs
#7 Winix 5500-2

4.6 out of 5 stars
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Room size: Up to 360 sq ft
ACH: 5
Filters (4): Prefilter, AOC Carbon filter, True HEPA filter, PlasmaWave filter
Airflow: NaN
Noise: 27.8 dB to ?
Power: 70W (120V, 0.58A)
Fan Speeds: 4
Weight: 15.4 lbs
#8 Honeywell HPA300 B00BWYO53G

4.5 out of 5 stars
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Room size: Up to 465 sq ft
ACH: 5
Filters (3): 3x True HEPA filter (HRF-R1, HRF-R2, HRF-R3)
Airflow: NaN
Noise: NaN
Power: NaN
Fan Speeds: 4
Weight: 17.3 lbs

#1 Alen BreatheSmart FLEX (Best Overall Air Purifier)

Of all the air purifiers, the Alen BreatheSmart FLEX is the best one to balance all the crucial specifications. It can clean a large 700 sq ft room two times per hour, and it can also clean air smaller 200 sq ft room seven times per hour.

When the turbo speed is engaged, the Alen BreatheSmart FLEX can clean your air of dust, allergens and prevent mold growth at 50 W of power. This creates a powerful 187 CFM airflow. At the same time, the best air purifier is gentle enough; you can set it on low speed and spend less than $0.5 per month running it.

The aesthetics are amazing. Below you can see how the ‘White’ model looks like. You can choose between ‘Oak’, ‘Rosewood’, ‘Electric Blue’, and several more color patterns. In effect, the Alen BreatheSmart FLEX becomes a piece of interior design:

Alen BreatheSmart FLEX is the best air purifier for small and large rooms
Alen BreatheSmart FLEX comes with a balanced harmony of specifications. Strong and gentle at the same time, with top-notch H13 HEPA filters.

The core of Alen BreatheSmart FLEX is the high-capacity H13 HEPA filter that can capture up to 99,95% of airborne particles bigger than 0.3 microns. That’s the best filtration system all the best air purifiers have. You can check other Alen BreatheSmart reviews here.

Additionally, the upgraded version comes with an activated carbon filter (the filter itself weighs 0.66 lbs and is high-capacity) that can remove smoke, household chemicals, and volatile organic compounds.

One thing that sets the Alen BreatheSmart FLEX apart from all other air purifiers is a gentle sleep mode. This ‘lights out’ mode was validated by SleepScore to ensure both low luminosity and low decibel levels from the air purifier.

The whole device weighs 15 lbs; it’s easy to move around the house. You get the 4 fan speeds; the first 3 are very quiet (up to 49 dB) and can provide up to 147 CFM airflow. The last one – the Turbo speed – is powerful enough to achieve 187 CFM but can be a bit noisier (55 dB).

All in all, the Alen BreatheSmart FLEX presents a harmony of aesthetics and specifications. It is the most well-rounded and therefore the best air purifier you can buy:

Alen BreatheSmart FLEX (Upgraded)

  • Represents a harmony of specs you want in every air purifier
  • Can achieve high airflow of 187 CFM (powerful yet gentle enough)
  • Even if you put it into a giant 700 sq ft room, you can 2 ACH (air changes per hour)
  • Usually operates below 50 dB (only Turbo speed goes beyond 50 dB)
  • Modern aesthetics with 7+ natural colors to choose from
  • Comes with a top-of-the-line HEPA filter with the additional activated charcoal filter
  • Turbo speed can be noisy (55 dB)
  • It has a premium price

#2 Blueair Blue Pure 211+ (Minimalistic Swedish Design)

Even Swedes in Scandinavia have problems with air pollution. Pollen, mold, airborne bacteria, and pet odors are a part of most Swedish households. That’s why they developed the Blueair Blue Pure 211++ air purifier; with a touch of minimalistic Swedish design.

The best thing about a minimalistic design air purifier is that you can put it literally in every room without disturbing the interior design. The 61 W Blueair Blue Pure is powerful enough to purify the air in rooms up to 540 sq ft. You can easily put in a bathroom, living room, or pretty much any room that isn’t larger than 23×23.

Blueair Blue Pure has a 3-stage filtration system. The pre-filter made out of fabric is designed to trap larger airborne particles like hair and dust mites. The main filter – the particle filter – removes all the most annoying things air can carry. These include pollen, mold, allergens. For the finishing touch, you’ll find the carbon filter. This is the last stage in air purification; it removes smoke and odor-causing bacteria from the air.

Classic minimalistic Swedish design gives you a range of colorful options. You can see some of them here:

most colorful air purifiers designed by swedish hvac designers
Blueair Blue Pure 211++ is a series of Swedish air purifiers. They can purify the air in rooms up to 540 sq ft and come with a touch of Swedish minimalistic design.

They handle enough airflow to change air 5 times per hour in a small room. Blueair Blue Pure 211++ doesn’t have an airflow rate in the specification sheet; given the 61W maximum power and ACH=5, we can roughly estimate the airflow to be about 350 CFM.

At low speeds (the Blueair Blue Pure has 3 fan speed settings), it can be as quiet at 31 dB. You won’t hear the air purifiers. However, the high fan speed setting can reach a decibel level of 56. That can be quite annoying, especially if you’re running the air purifier in the bedroom during the night. Obviously, most people prefer to turn it to a low setting with a minimum of 31 dB noise levels.

All in all, the Blueair Blue Pure 211++ is quite a small but powerful air purifier. The Swedish design gives it that extra glare that many air purifiers lack. You can learn more about Blueair air purifiers in this comparison.

Blueair Blue Pure 211++

  • Minimalistic Swedish design (perfect for maintaining interior design)
  • Can achieve high airflow of 211-350 CFM (estimated)
  • Can be used in larger bedrooms, kitchens or living rooms (with ACH up to 5)
  • You can choose to combine 2 colors
  • Very quiet on low setting (31 dB)
  • Quite an affordable price for this specs and especially for the appealing aesthetics
  • Can be louder on high speed setting (56 dB); you should switch to low speed at night
  • People tend to have problems choosing the right color

#3 Molekule Air (Most Revolutionary And Aesthetic Air Purifier)

If you’ve searched for the best air purifier a bit, you must have come across the Molekule Air. This is the most revolutionary air purifier that has been introduced in the last few years. In fact, it’s quite amazing what it can offer.

Let’s have a look at a few things that make Molekule Air such an amazing air purifier device (we’ll come to the next-gen PECO filter later on).

The first thing everybody is impressed by is the aesthetics. I mean, you can’t deny the Molekule Air doesn’t look amazing. That silver shine is actually machined aluminum. With such a modern design, the Molekule Air purifier can fit in every modern household.

Another advantage is seamless connectivity. Molekule Air is a smart air purifier that can connect to WiFi and you can control it via iPhone or Android app. Here’s how the smart Molekule Air – iPhone connection works:

wifi enabled Molekule Air purifier for larger rooms
Molekule Air is a revolutionary air purifier. It can be connected to WiFi, has an amazing design, and the next-gen PECO filtration system.

Do you see that leather strap? That’s not only visually appealing; it’s literally a handle by which you can lift the 18 lbs air purifier up and move it around the house. It can handle rooms up to 600 sq ft in size; after it purifies the air in the bedroom, you can easily lift it up and more it to the living room.

Now for the NASA level technology part; Molekule Air doesn’t have HEPA or activated charcoal filter. That’s old school air purification. The Molekule Air has integrated PECO filter; PECO stands for Photo Electrochemical Oxidation.

The revolutionary filter uses light to activate nanoparticles that cover the filter. In turn, the activated nanoparticles break down pollutants such as pollen, dust, mold, smoke, and so on on a molecular level. To power the PECO filter you need 85W of power. That makes the Molekule Air one of the most powerful air purifiers around. It’s cutting-edge science; using light to purify the air. You can read more about the PECO tech in the review of all Molekule air purifiers

Of course, even the Molekule Air is not a perfect air purifier. It gets a bad rep because of the price. It looks expensive, it comes with new technology, and it is expensive. The Molekule Air can cost up to $800; only high-end and elite households can afford such a marvelous air purifier.

Molekule Air With PECO Filtration

  • Most revolutionary air purifier with NASA level technology
  • PECO filters; does a better job than several old-school HEPA filters
  • Immaculate design; made out of machined aluminum
  • You can move it from room to room easily; that’s why it has that leather strap
  • Seamless connectivity via WiFi and control via iPhone or Android app
  • Only one drawback: the price. Only high-end households can afford the Molekule Air

#4 Coway AP-1512HH (Best Price-Performance)

Most of the top air purifiers cost more than $300. They have good specs and, let’s be honest, sometimes overpriced aesthetic design. The Coway AP-1512HH is a perfect air purifier for everybody who needs a purifier that works really well (great specs) but doesn’t have that avant-garde look. That drives down the price of the Coway AP-1512HH to less than $300.

The specs are the strong selling point for the Coway AP-1512HH. It has quite a lot of power – 77 Watts, to be exact, powered by 120 V and 0.64 A maximum current. All this power can achieve an incredible 268 CFM airflow at one of the lowest high-speed fan noise levels of 53.8 dB.

The airflow is very important when it comes to air purification. CADR number you’ll find on the specification sheets (stands for Clean Air Delivery Rate) detonates the clean airflow for different pollutants. Coway AP-1512HH CADR for dust, for example, is 246 CFM. For pollen, it’s 240 CFM, and for smoke 233 Cubic Feet Per Meter (CFM).

Coway AP-1512HH on the kids room floor
Coway AP-1512HH has incredible specs; 268 CFM at a low noise rate of 53.8 dB. It’s one of the most powerful air purifiers with 77 Watts of energy.

Obviously, power is one part of the equation, and the filters are the other part. Coway AP-1512HH has 1 prefilter for larger dust parts (like hair) and 3 air purification filters. These include deodorization filter, True HEPA filter and, quite uniquely, the Vital Ion filter. You can check the rundown of all of these filters in the review of the best Coway air purifiers

Combined they can achieve the high CADR rates for pollutants such as dust, mold, mildew, smoke, pollen, and so on.

All in all, the Coway AP-1512HH might not look avant-garde but it has the best specifications out of all the best air purifiers. And it’s available for less than $300.

Coway AP-1512HH

  • The air purifier with the best specifications
  • Incredibly high 268 CFM airflow; with CADR 246 CFM for dust, 240 CFM for pollen, and 233 CFM for smoke
  • Quiet even on the high-speed fan setting (up to 53.8 dB)
  • 4-stage filtration system (with Vital Ion filter)
  • Costs less than avant-garde designed air purifiers
  • It’s exactly beautiful; the design is somewhat simple
  • Only available in white or black color
  • With such high capacity, filters may have to be replaced more frequently

#5 Pure Enrichment PureZone 3-in-1 (Best Small Air Purifier)

The Pure Enrichment PureZone 3-in-1 elegance lies in its size. Air purifiers, on average, are about 14-15 pounds heavy. The Pure Enrichment air purifier weighs only 6 pounds and can sneak in any room, no matter how tiny.

It’s most appropriate for rooms up to 200 sq ft. For example, if you’re looking to purify the air in a small 12×12 room, the mini air purifier is exactly what would do the job very well without much overhead. The air purifier itself is quite strong; it has 60W of power and on the high fan speed setting (it has 3 settings), it will need 0.5 ampers to power.

The small and compact size comes from its 3-in-1 filtration system. Usually, air purifiers have 2 or 3 separate filters. In Pure Enrichment PureZone 3-in-1, three filters are merged into a tight singular unit. These 3 filters include the prefilter, activated carbon filter, and the well-known True HEPA filter. They are followed by a special 4th UV-C light filter. The UV adds another level to air sanitation; it targets the living microorganisms.

Pure Enrichment PureZone 3-in-1 portable air purifier
Pure Enrichment PureZone 3-in-1 is the smallest air purifier, weighing only 6 lbs. It has an effective 3-in-1 filtration system, followed by a UV-C filter for additional air purification.

Its small size makes the Pure Enrichment PureZone 3-in-1 the most appropriate air purifier for first-time buyers who aren’t totally sure if they can benefit from air purification. The best thing about that is the price.

Pure Enrichment air purifier’s original cost is about $180. However, it’s often available at a special reduced price. You can check the current price here:

Pure Enrichment PureZone 3-in-1

  • The smallest air purifier, weighing just 6 pounds
  • Powerful for its size; powered up to 60 Watts
  • Compact filtration system; pre-filter, activated carbon filter, and True HEPA filter
  • Additional UV-C filter for added air sanitization
  • You can get a good deal; for less than $180
  • It’s small and appropriate for rooms below 200 sq ft
  • Low fan speed setting is rather weak
  • Isn’t particularly energy efficient

#6 LEVOIT LV-H132 (The Cheapest Air Purifier For Less Than $100)

If you’re looking for a cheap air purifier, you can’t possibly overlook the LEVOIT LV-H132. This is pretty much the most popular small and cheap air purifier you can buy for less than $100.

Does the $100 air purifier actually deliver cleaner air? It does but at a lower rate than most of the other best air purifiers. For one, the LEVOIT LV-H132 has only 28W max power (compared to most purifiers that have 50+ Watts of power.

Its effective range is 129 sq ft. For most bedrooms, living rooms, or even kitchens, that’s not enough. However, if you have a small office or room, something in the range of 10×10, the LEVOIT LV-H132 does the job well enough.

As far as the filters are concerned, the LEVOIT LV-H132 is built quite in the same way as most of the bigger air purifiers. It has a pre-filter, followed by a carbon filter and a True HEPA filter. These three can deal with all kind of pollutants and unwanted smells in your office or small room:

LEVOIT LV-H132 cheap air purifier
LEVOIT LV-H132 is the cheapest small air purifier, designed for small 10×10 rooms or offices. It costs less than $100.

Despite its small size, it can achieve 4 air changes per hour in a small office. That, coupled with the low price, made LEVOIT LV-H132 one of the most popular air purifiers; you can read more about Levoit air purifiers here. In fact, the LEVOIT LV-H132 has accumulated more than 10,000 positive reviews on Amazon. You can check the reviews and the price of LEVOIT LV-H132 below:


  • Small and cheap air purifier for less than $100
  • Appropriate for small rooms (10×10) or small offices
  • Can achieve ACH of 4 in small rooms
  • One of the most popular air purifiers; over 10,000 reviews on Amazon
  • Has a solid filter for such a small device (6.6 lbs)
  • Not appropriate for medium-sized and bigger rooms (bedroom, living room)
  • Only available in white and black
  • Isn’t particularly energy efficient
  • Can reach noise levels up to 50 dB which is quite a lot for a low airflow air purifier

#7 Winix 5500-2 (Solid Air Purifier With Advanced Filters)

Winix 5500-2 is another solid choice for an air purifier. It is quite a powerful device with 70W power (powered by 120 volts and 0.58 ampers) that can effective purifier air in rooms up to 360 sq ft. There is nothing all that special about the Winix 5500-2 really (with the exclusion of the PlasmaWave filter, of course). Nonetheless, it is a solid air purifier available at a very affordable price range.

It features 4 filters; pre-filter, AOC carbon filter, True HEPA filter, and PlasmaWave filter. Two out of these are quite extraordinary. The AOC filter stands for Advanced Odor Control; this is a patented technology that used activated carbon granular in order to purify the air.

The other is the permanent PlasmaWave filter. Ozone-free, this filter works by breaking down allergens, odors, VOC, and other pollutants.

Winix 5500-2 air purifier with plasmawave filter
Winix 5500-2 is a solid air purifier with advanced filters. It features the AOC carbon filter and PlasmaWave permanent filter.

Given the advanced filter technology, the Winix 5500-2 is quite inexpensive. You can check the price of all the best Winix air purifiers here.

There is one major drawback though: the aesthetic. The Winix 5500-2 doesn’t exactly look like a beautiful element of interior design. And it’s is only available in black.

Winix 5500-2

  • Solid air purifier (nothing special really)
  • Advanced filters; AOC filter and PlasmaWave filter
  • Powerful (70W) and appropriate for large rooms up to 360 sq ft
  • Has 4 fan speeds
  • Aesthetics are missing
  • Only available black
  • Has a feel of an old-school model

#8 Honeywell HPA300 B00BWYO53G (Air Purifier For Larger Rooms)

Honeywell is a well-known brand; they make everything from air purifiers, to dehumidifiers and air conditioners. Luckily they invested into the Honeywell HPA300 B00BWYO53G; a great air purifier for larger rooms.

The powerful Honeywell HPA300 B00BWYO53G can purify the air in larger rooms; up to 465 sq ft. If you have a larger bedroom, living room, or kitchen, the Honeywell HPA300 B00BWYO53G is well equipped to handle all the air purification you’ll need.

It has 3 distinct True HEPA filters; namely, HRF-R1, HRF-R2, and HRF-R3. This is quite a unique filtration design. Most air purifiers have a single True HEPA filter. Honeywell had decided to include three True HEPA filters one after the other to achieve the full air sanitization effect.

The Honeywell HPA300 B00BWYO53G is quite a big air purifier. Here are the dimensions and how it looks in a living room:

Honeywell HPA300 B00BWYO53G
Honeywell HPA300 B00BWYO53G is a big air purifier most appropriate for larger rooms.

In order to maintain the air quality in your household, the Honeywell HPA300 B00BWYO53G has 4 fan speed settings. You can start with the high speed and dial it down when the amount of the air pollutants is reduced. If you look at the comparison of Honeywell air purifiers here, you can see why the HPA300 is the best Honeywell air purifier. 

Honeywell is selling the HPA300 B00BWYO53G at an affordable middle-range price (typical for Honeywell).

Honeywell HPA300 B00BWYO53G

  • Best Honeywell air purifier
  • Most appropriate for larger rooms up to 465 sq ft
  • Not 1 but 3 True HEPA filters (HRF-R1, HRF-R2, HRF-R3)
  • Typical middle-range Honeywell price
  • Not the most pleasing to look at
  • It’s big and takes quite a lot of space
  • It’s overkill for small rooms

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