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The 12 Best Air Purifiers for 2024: 95 Purifiers Tested

Derek Hales

Written By: Derek Hales

Updated on:

We’ve tested 95 different air purifiers with a battery of data-driven tests that assess purification performance, ozone generation (or lack of it), filter quality, noise, and more.

We organized the best air purifiers for 2024 by coverage level so you can select the right-sized purifier for your home. In addition, we’ve laid out our testing data below, coverage and filter costs analysis, and details on how we choose the purifiers on this list.

In This Comparison
Whole Home | Extra Large Rooms | Large Rooms | Medium Rooms | Small Rooms | Purification | Filters | Coverage | Noise | How We Test

Video Best Of

Whole Homes (2,000 sq. ft.)

Let’s start with our largest coverage air purifiers, best suited for entire homes or multiple rooms.

#1 Overall Pick

Airdoctor 5500

AirDoctor 5500/i

Coverage: 2,002 sq. ft. CADR: 534 CFM Price: $$$$

Massive Coverage

Medify Ma 112

Medify MA-112

Coverage: 2,090 sq. ft. CADR: 559 CFM Price: $$$

Large Coverage; Great Price

Oransi Mod+

Oransi Mod+

Coverage: 1,361 sq. ft. CADR: 375 CFM Price: $$

Incredible Quality

Iqair Healthpro Plus

IQAir HealthPro Plus

Coverage: 1,125 sq. ft. CADR: 300 CFM Price: $$$$

Aesthetically Pleasing

Rabbit Air A3

Rabbit Air A3

Coverage: 1,070 sq. ft. CADR: 286 CFM Price: $$$$

Heating & Cooling Options

Shark 3 In 1 Max

Shark 3-in-1 Max

Coverage: 1,000 sq. ft. CADR: Unknown Price: $$$

Medium Coverage with App

Alen Breathesmart 45i

Alen BreatheSmart 45i

Coverage: 800 sq. ft. CADR: 245 CFM Price: $$$

Auto-Detection Features

Hathaspace Hsp001

Hathaspace HSP001

Coverage: 700 sq. ft. CADR: 160 CFM Price: $$

Unique Color options

Blueair Pure 211+

BlueAir Pure 211+

Coverage: 540 sq. ft. CADR: 350 CFM Price: $$

Solid Performance; Great Value

Coway 1512hh

Coway 1512HH

Coverage: 360 sq. ft. CADR: 246 CFM Price: $

Medium Coverage with Remote

Winix 5500 2

Winix 5500-2

Coverage: 360 sq. ft. CADR: 243 CFM Price: $

Best Small Coverage Option

Levoit Core 300s

Levoit Core 300s

Coverage: 215 sq. ft. CADR: 141 CFM Price: $

Air Doctor 5500/i

Airdoctor 5500
98 Purification
96 Build Quality
85 Noise
100 Usability
90 Maintenance
96.3 Overall Score
Tested With Scoring System 1.1

Best For

  • Incredibly large 2,002 sq. ft. coverage area and 534 CFM
  • 6 total filters with 2 air intakes
  • Easy-to-use controls and high build quality

Considerations

  • Increased maintenance costs with 6 filters
  • Higher price compared to other systems

Why It’s Best

As the successor to the AirDoctor 5000, the 5500 is a high-quality device built to handle multiple rooms or even some homes. Using 6 total filters with 2 air intakes, it achieved fantastic results in our tests, reducing PM2.5 and PM10 down to 0.1 after 1 hour.

Despite having an optional ionizer, no ozone was detected during our tests. In addition, the 5500 has 2 carbon and 2 HEPA filters of high quality.

A combination of the purification performance, excellent build quality, and quality filters leads the AirDoctor 5500 to be among the highest-scoring air purifiers we’ve tested to date.

Filter Type: HEPA
Coverage Area: 2,002 sq. ft.
CADR: 534 CFM

Purification performance for the AirDoctor 5500 was fantastic, bringing PM2.5 and PM10 down to 0.1. This is nearly perfect performance and notably better than the average air purifier we test. With the ionizer turned on, we measured no ozone in our tests.

Airdoctor 5500 Filters
Airdoctor 5500 Filters 2

Along with a high-quality HEPA filter, the 5500 uses activated carbon and the optional ionizer. Replacing these filters can be costly, as the only options currently available are from the manufacturer.

It has two air intakes, which cover up to 2,002 sq. ft. with a CADR of 534 CFM. This provides enough airflow to cover multiple rooms or even homes at the highest fan speed.

Furthermore, the AirDoctor 5500 can be fairly loud at 65.1 dB on the highest fan setting but isn’t the loudest on this list. However, it is 3.3 dB louder than our testing average of 61.8 dB.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.1 ppm
Particles (2 hour test)33
AQI (2 hour test)2
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Ionizer
Coverage Area2,002 sq. ft. (186 sq. m.)
CADR534 CFM
Max Wind Speed15.2 mph (24.5 kph)
Noise Test66.9 dB

Other AirDoctor Air Purifiers

AirDoctor also manufactures a number of other air purifiers that have different coverage areas but the same feature set. These include the 3500, 2000, and 1000.

Air PurifierPM2.5PM10OzoneCoverage (sq. ft.)CADR (CFM)Max Wind Speed (mph)Max Noise (dB)Recurring Costs / CFM
AirDoctor 50000.10.102,00253419.565.7$0.47
AirDoctor 3500i0.10.201,27434015.666.8$0.35
AirDoctor 30000.10.2062837317.170.2$0.41
AirDoctor 2000i0.20.2061016216.365.1$0.56
AirDoctor 20000.10.1061016215.260.3$0.74
AirDoctor 10000.10.202851629.664.5$0.49

We’ve tested all of these units and found their performance to be equally as good as the 5500 model.

Medify MA-112

Medify Ma 112
98 Purification
95 Build Quality
87 Noise
92 Usability
96 Maintenance
96.6 Overall Score
Tested With Scoring System 1.1

Best For

  • Massive coverage area of 2,090 sq. ft. (2x air change per hour)
  • Practically perfect performance with 0.1 PM2.5 after 1 hour
  • Excellent build and filter quality

Considerations

  • Expensive product
  • Physically large, 28.3” tall and 15.7” wide

Why It’s Best

The Medify MA-112 covers an incredibly large area with fantastic performance. It utilizes a combination of multiple high-performance filters with a HEPA filter as the base. This, with the powerful airflow, leads to fantastic results.

After 1 hour, both PM2.5 and PM10 were reduced to 0.1. These are nearly perfect results, leading the MA-112 to be one of the highest-scoring air purifiers we’ve tested to date. Furthermore, ozone isn’t an issue and filters are readily available from both the manufacturer and third parties.

Filter Type: HEPA
Coverage Area: 2,090 sq. ft.
CADR: 559 CFM

The Medify MA-112’s performance was incredible. During our purification tests, PM2.5 and PM10 were reduced to 0.10. On average, based on all the air purifiers we’ve tested to date, air purifiers reduce PM2.5 to 0.50 and PM10 to 0.76. The MA-112 reduced the PM2.5 and PM10 more effectively, by 0.40 and 0.66, respectively. In addition, no ozone was detected during our tests with the ionizer turned on.

Medify MA-112 top
Medify MA-112 top

It includes a 5-part filtration system that utilizes an optional ionizer and UV-C filter. In addition, the MA-112 has a massive coverage area of 2,090 sq. ft. and a CADR of 559 CFM, which is more than capable of covering multiple rooms or even homes.

Medify MA-112 filters HEPA side
Medify MA-112 filters HEPA side
Medify MA-112 filters carbon side
Medify MA-112 filters carbon side

Noise levels for the Medify range from 41.5 – 64.4 dB, being neither the quietest nor loudest air purifier on this list. However, it is louder than the average air purifier that we test, which generates 61.8 dB on the highest fan speed.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.1 ppm
Particles (2 hour test)14
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Ionizer, UV-C
Coverage Area2,500 sq. ft. (232 sq. m.)
CADR559 CFM
Max Wind Speed10.4 mph (16.7 kph)
Noise Test64.4 dB

Other Medify Air Purifiers

Medify offers a multitude of additional air purifiers all covering specific coverage areas. We’ve tested a few of them, including the MA-125 and MA-50.

Air PurifierPM2.5PM10OzoneCoverage (sq. ft.)CADR (CFM)Max Wind Speed (mph)Max Noise (dB)Recurring Costs / CFM
Medify MA-1250.10.1Unknown4,100547UnknownUnknown$0.20
Medify MA-500.10.2Unknown1,100295UknownUknown$0.24

Both the MA 125 and 50 had equally good performance compared to the MA 112.

Extra Large Rooms (1,000 – 2,000 sq. ft.)

Next, let’s discuss the air purifiers that still cover a large area, just not quite as large as AirDoctor or Medify.

Oransi Mod+

Oransi Mod+
98 Purification
95 Build Quality
86 Noise
96 Usability
96 Maintenance
96.7 Overall Score
Tested With Scoring System 1.1

Best For

  • Excellent purification performance and large coverage area
  • Inexpensive filters at just $0.05 / per sq. ft. of coverage per year
  • Quick and easy setup

Considerations

  • Touch screen controls can be slow to respond
  • No remote / app connectivity
  • Lacks auto mode

Why It’s Best

The Oransi Mod+ is an upgraded version of the Mod, which comes with an increased coverage area and improved CADR. It uses a single filter, made of 3 different mediums: pre-filter, activated carbon, and HEPA material.

The Mod+ generated no ozone while running and brought PM2.5 down to 0.1 and PM10 down to 0.2 after one hour. The filter quality is excellent and the grey fabric gives the device an appealing look.

The overall result for the Oransi Mod+ is receiving the highest score for this coverage area. With an overall score of 96.7, the Mod+ stands as one of our best-scoring air purifiers on this list.

Filter Type: HEPA
Coverage Area: 1,361 sq. ft.
CADR: 375 CFM

The Oransi Mod+, being an upgraded version of the original Mod, achieved nearly perfect results in our purification testing. After 1 hour, the Mod+ brought PM2.5 down to 0.1 and PM10 down to 0.2. While I would have liked to see PM10 reach that 0.1 threshold, these are still great results and significantly better than our testing average.

Oransi Mod+ Top
Oransi Mod+ Top

The biggest upgrades from the original mod are the coverage area and CADR. Coverage was increased to 1,361 sq. ft. and CADR increased to 375 CFM on the highest fan speeds. While the Mod+ lacks an auto mode, it gives the user 12 different settings to choose from to find the right purification level for their home.

An air purifier of this size and airflow generates noise levels in the 43.3 – 65.8 dB range. This is around our testing average, although it is 4.0 dB louder on its max fan speed. Maintenance is quite simple as there is only 1 filter that needs to be replaced annually. Additionally, maintenance costs are relatively low considering the coverage area.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.2 ppm
Particles (2 hour test)15
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter
Coverage Area1,361 sq. ft. (126 sq. m.)
CADR375 CFM
Max Wind Speed13.1 mph (21.1 kph)
Noise Test65.8 dB

Other Oransi Air Purifiers

Air PurifierPM2.5PM10OzoneCoverage (sq. ft.)CADR (CFM)Max Wind Speed (mph)Max Noise (dB)Recurring Costs / CFM
Oransi EJ1200.10.1Unknown1,250330UnknownUnknown$0.53
Oransi Mod0.10.101,25033810.766.4$0.18
Oransi Mod jr.0.20.2Unknown878251UnknownUnknown$0.20

While the Mod+ is an evolution of the original Mod, Oransi still offers the original and Mod Jr., a smaller coverage area device.

IQAir HealthPro Plus

Iqair Health Pro Plus
98 Purification
93 Build Quality
82 Noise
92 Usability
76 Maintenance
94.2 Overall Score
Tested With Scoring System 1.1

Best For

  • High-quality construction and performance, reducing PM2.5 to 0.1
  • Large 1,125 sq. ft. coverage area with a CADR of 300 CFM
  • Easy to move despite its size, thanks to wheels

Considerations

  • Lacks auto mode and app connectivity, but has remote
  • Fairly expensive filters, $0.33 / per sq. ft. of coverage per year

Why It’s Best

The IQAir HealthPro Plus is the type of air purifier you wouldn’t be surprised to find in a hospital or doctor’s office. The simple, clean design and effective build are all built around a singular purpose: purifying the air. It does this with great effectiveness, reducing PM2.5 down to 0.1 and PM10 down to 0.2.

It generated no measurable ozone in our tests, as it’s equipped with a 3-part filtration system using activated carbon and a HEPA filter. Across the board, the IQAir HealthPro Plus is a simple device, yet incredibly effective at what it was designed to do.

Filter Type: HEPA
Coverage Area: 1,125 sq. ft.
CADR: 300 CFM

Purification performance for the IQAir HealthPro Plus was fantastic, reducing PM2.5 down to 0.1 and PM10 down to 0.2. These results are considerably better than our testing average among all other air purifiers we’ve tested to date. This, along with no ozone measured, gives us practically perfect results for purification.

IQAir HealthPro Plus carbon filter
IQAir HealthPro Plus carbon filter

It cleans the air via high-quality filters, including HEPA material and activated carbon. Furthermore, the HealthPro Plus has a large coverage area of 1,240 sq. ft. and CADR of 300 CFM, which is suitable for large rooms or sections of the home.

The HealthPro Plus is fairly loud at 69.2 dB on its maximum fan speed. While it isn’t too much louder than our testing average, it is still the loudest device on this list. In addition, it is also the most expensive when considering the annual costs per CADR. At $1.12 per CADR, it is $0.65 more expensive than the next most expensive device on this list, the AirDoctor 5500.

IQAir HealthPro Plus bottom with wheels
IQAir HealthPro Plus bottom with wheels

Even so, if a simple yet effective design is what you are looking for, then the IQAir HealthPro Plus just may be worth the asking price.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.2 ppm
Particles (2 hour test)18
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter
Coverage Area1,240 sq. ft. (115 sq. m.)
CADR330 CFM
Max Wind Speed7.8 mph (12.6 kph)
Noise Test69.2 dB

Other IQAir Air Purifiers

IQAir has a number of other high-end air purifiers including the GC MultiGas and Atem X. Additionally, they offer a personal air purifier called the Atem, designed to purify air in the immediate area. IQAir also offers complete home solutions with the PerfectPro Series. To date, we’ve measured exceptionally good purification performance on all IQ Air units we’ve tested.

Air PurifierPM2.5PM10OzoneCoverage (sq. ft.)CADR (CFM)Max Wind Speed (mph)Max Noise (dB)Recurring Costs / CFM
IQAir Atem X0.10.101,65044012.565.1$0.45
IQAir GC MultiGas0.10.201,1253007.167.7$0.26
IQAir Atem0.30.3Unknown15039UnknownUnknown$2.03

And this is the data for the PerfectPro Series as our testing methods was altered for a whole-home solution.

LocationBaseline PM2.5Baseline PM10Baseline ParticlesBaseline AQIAfter PM2.5After PM10After ParticlesAfter AQI
Kitchen2.23.7374120.71.11443
Living Room2.54.3294110.61.11142
Kid’s Room 14.38.0414120.40.4441
Kid’s Room 23.25.6396120.40.7982
Master Bedroom2.23.7319100.20.41191
Office2.95.1356120.61.11643

Rabbit Air A3

Rabbit Air A3
98 Purification
98 Build Quality
87 Noise
92 Usability
92 Maintenance
96.3 Overall Score
Tested With Scoring System 1.1

Best For

  • Practically perfect purification performance reducing PM2.5 and PM10 down to 0.1
  • App connectivity and other features that enhance usability
  • 1,070 sq. ft. coverage area fit for large rooms

Considerations

  • Fairly cumbersome to carry, but has inlets for hand grips
  • Scheduling tool isn’t the most robust
  • Multiple filters that need to be replaced

Why It’s Best

Packing a 1,070 coverage area and CADR of 286 CFM, the Rabbit Air A3 is a fantastic choice for large room coverage. In testing, it brought PM2.5 and PM10 down to 0.1, generating no measurable ozone in our tests.

The A3 packs 6 unique filters to clean the surrounding air, including a medium filter and a customized filter tailored towards specific needs. This increases the annual maintenance costs, but provides more specific purification for your situation.

The Rabbit Air A3 has an easy setup, app connectivity, and an auto mode, which all improve the user experience. It’s an excellent device and among the highest-scoring air purifiers on this list.

Filter Type: HEPA
Coverage Area: 1,070 sq. ft.
CADR: 286 CFM

When it comes to purification performance, the Rabbit Air A3 stands with the other air purifiers on this list, reducing PM2.5 and PM10 down to 0.1 after 1 hour. While the PM10 increased slightly to 0.2 after 2 hours, this level of performance is exactly what we look for in a high-performance air purifier. Furthermore, no ozone was generated during our tests.

Rabbit Air Minusa3 Cover Removing
Rabbit Air MinusA3 removing cover

The manufacturer chose to equip the Rabbit Air A3 with 6 different filters to help clean the surrounding air. These include an optional ionizer, a medium filter for larger particulates, and a customized filter that you choose to best fit your home.

You can choose from:

  • Germ defense filter
  • Toxin absorber filter
  • Pet allergy filter
  • Odor remover filter

These specialized filters increase the annual filter replacement costs and puts the device on the more expensive side of the price spectrum, based on the recurring costs per CADR of $0.41. It is beaten out by only two other air purifiers on this list as being the most expensive device to maintain.

Rabbit Air MinusA3 filters
Rabbit Air MinusA3 filters

Whatever filter you choose, the A3 is equipped to cover 1,070 sq. ft. with a CADR of 286 CFM on its highest fan speed. The device houses a particulate sensor and will indicate the surrounding air quality via the colored LED. In addition, it uses this information when auto mode is turned on, to automatically adjust the fan speed based on those readings.

Rabbit Air MinusA3 controls
Rabbit Air MinusA3 controls

It falls in line with the average air purifier, generating 65.0 dB of noise on the highest fan speed. That said, on the lowest fan speed, it is one of the quietest air purifiers on this list generating 39.7 dB of noise.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.2 ppm
Particles (2 hour test)10
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Ionizer, Medium, Customized
Coverage Area1,070 sq. ft. (99 sq. m.)
CADR286 CFM
Max Wind Speed17.3 mph (27.8 kph)
Noise Test65.0 dB

Other Rabbit Air Air Purifiers

Air PurifierPM2.5PM10OzoneCoverage (sq. ft.)CADR (CFM)Max Wind Speed (mph)Max Noise (dB)Recurring Costs / CFM
Rabbit Air MinusA20.10.1Unknown815218UnknownUnknown$0.44
Rabbit Air BioGS1.83.3Unknown625147UnknownUnknown$0.61

Rabbit Air offers a few air purifiers in the 600 – 1,000 sq. ft. range, including the MinusA2 and BioGS.

Shark 3-in-1 Max

Shark 3 In 1 Max
96 Purification
95 Build Quality
93 Noise
92 Usability
96 Maintenance
95.6 Overall Score
Tested With Scoring System 1.1

Best For

  • Large courage area
  • Fan and heater functionality
  • Exceptional air purification performance reducing PM2.5 and PM10 down to 0.2

Considerations

  • Tall device that isn’t the easiest to move around
  • No app functionality, but has a conveniently placed remote control

Why It’s Best

While many other air purifiers have incredible size and performance, few come with the feature set available to the Shark 3-in-1 Max. It has great performance, reducing PM2.5 and PM10 down to 0.2 after 1 hour, creating no measurable ozone in our tests, and has high-quality filters. In addition, it can cover up to 1,000 sq. ft.

What really sets the 3-in-1 Max apart are the fan and heating capabilities. While still using the filter, the device can be set to help cool or heat the area it is working in. Few other devices are able to combine this functionality, while still having exceptionally good purification performance.

Filter Type: HEPA
Coverage Area: 1,000 sq. ft.
CADR: Unknown

The Shark 3-in-1 Max showcased excellent performance in our tests, reducing PM2.5 and PM10 down to 0.2 after one hour. While it didn’t quite reach 0.1 levels of perfection, it remains well above our testing average of 0.49 PM2.5 for that same testing time duration. Additionally, we found the 3-in-1 generates no measurable ozone while in operation.

While it performs the task of purifying the air in a 1,000 sq. ft. area, that isn’t the only functionality it offers. It comes with a remote control that conveniently stores itself on top of the device with a soft magnetic attachment. In addition, the real notable feature is the fan and heating options. This allows the 3-in-1 Max to cool or heat the surrounding air while it functions as an air purifier.

Shark 3 In 1 Max Remote Dock
Shark 3 In 1 Max Remote Dock

The system itself utilizes a 3-in-1 filter that includes both HEPA and activated carbon, handling both small particulates and odors. It runs 1.3 dB quieter than the average air purifier we test, generating 60.7 dB of noise on the highest fan speed. An added advantage is the relatively low annual maintenance costs. With a recurring cost of $0.15 per CADR, replacing filters throughout its lifetime isn’t going to break the bank.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.2 ppm
Particles (2 hour test)12
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter
Coverage Area1,000 sq. ft. (93 sq. m.)
CADR300 CFM
Max Wind Speed11.4 mph (18.3 kph)
Noise Test59.3 dB

Other Shark Air Purifiers

Shark has recently delved into the air purifier market and have released a few feature packed devices, including the 3-in-1 and NeverChange.

Air PurifierPM2.5PM10OzoneCoverage (sq. ft.)CADR (CFM)Max Wind Speed (mph)Max Noise (dB)Recurring Costs / CFM
Shark NeverChange0.10.201,400Unknown8.953.3Unknown
Shark 3-in-12.64.50500Unknown7.154.3Unknown

The NeverChange was equally as impressive as the 3-in-1 Max regarding air purification performance.

Large Rooms (500 – 1,000 sq. ft.)

Now, let’s discuss the air purifiers that fall in the 500 to 1,000 square foot range.

Alen Breathesmart 45i

Alen Breathesmart 45i
96 Purification
97 Build Quality
100 Noise
96 Usability
98 Maintenance
96.5 Overall Score
Tested With Scoring System 1.1

Best For

  • Excellent purification performance at 0.2 PM2.5
  • Incredibly quiet air purifier
  • High-quality design and build

Considerations

  • Lacks WiFi, but is available in upgraded version

Why It’s Best

The Alen Breathesmart 45i covers a medium to large area of 800 sq. ft. with a CADR of 245 CFM. It comes with a touch display and auto-mode, which both work with the internal sensors that measure air quality. The base version lacks WiFi connectivity, but it is available with an upgraded version.

Performance was great across the board, not producing ozone and bringing PM2.5 and PM10 down to 0.2 after 1 hour. This level of performance was achieved with HEPA, carbon, and ionic filters.

Despite the medium-to-large coverage area, the 45i runs fairly quiet, generating 53.4 dB of noise on the highest fan speed.

Filter Type: HEPA
Coverage Area: 800 sq. ft.
CADR: 245 CFM

Covering a medium-sized room, the Alen Breathsmart 45i showcased excellent results in our purification tests. After 1 hour, it reduced PM2.5 and PM10 to 0.2. While that isn’t a perfect result, it is far better than our testing average of a PM2.5 reduction to 0.50 after 1 hour. In addition, we measured no ozone during testing with the ionizer turned on.

Alen Breathesmart 45i Unboxed
Alen Breathesmart 45i Unboxed

The 45i is capable of covering up to 800 sq. ft. with a CADR of 245 CFM. Despite this level of coverage, the 45i is able to remain fairly quiet at 53.4 dB on its highest fan speeds. This makes it the quietest device on this list, even when running at full power.

While the 45i doesn’t include app connectivity in their standard version, there is an upgraded version that has those capabilities. However, it still comes with useful features that make the device more hands-free. Built inside the 45i are particulate sensors that measure the surrounding air quality. Not only does it display this data via a colored ring, but it uses this data to adjust the fan speeds automatically as needed.

The filters included with the 45i are fairly common, which makes them relatively cheap and easy to replace. Overall, the 45i stands as an excellent choice for a medium-coverage air purifier.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.1 ppm
Particles (2 hour test)29
AQI (2 hour test)2
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Ionizer
Coverage Area800 sq. ft. (74 sq. m.)
CADR245 CFM
Max Wind Speed8.7 mph (14.0 kph)
Noise Test53.4 dB

Hathaspace HSP001

Hathaspace Hsp001
95 Purification
94 Build Quality
95 Noise
92 Usability
96 Maintenance
95.1 Overall Score
Tested With Scoring System 1.1

Best For

  • Has auto mode for real-time fan speed adjustment
  • Includes a remote for wireless control
  • Great performance, reducing pm2.5 and 10 down to 0.2

Considerations

  • Lacks app connectivity

Why It’s Best

The Hathaspace HSP001 is a 5-stage air purification system designed for medium to large rooms. Beyond a HEPA and carbon filter, the Hathaspace includes a cold-catalyst and antibacterial filters. It lacks app connectivity, but has a remote control as an alternative.

In testing, it reduced both PM2.5 and PM10 down to 0.2 in 1 hour and generated no ozone. Its CADR is 160 CFM, which allows it to cover up to 700 sq. ft. effectively.

Annual maintenance costs are slightly more expensive thanks to the 5 filters, however, it isn’t anything crazy expensive. That, paired with a relatively low asking price, makes the Hathaspace HSP001 a solid option.

Filter Type: HEPA
Coverage Area: 700 sq. ft.
CADR: 160 CFM

Thanks to a 5-part filtration system, the Hathaspace HSP001 had a great performance in our tests. While it wasn’t perfect, the air purifier was able to reduce both PM2.5 and PM10 to 0.2 after 1 hour. Those results remained consistent after the 2nd hour passed. In addition, no ozone was measured in our tests.

Hathaspace Hsp001 Filter Size
Hathaspace filters

What sets this air purifier apart from the others on this list, is the inclusion of 2 filters, the cold catalyst and antibacterial filters. The cold catalyst focuses on large dust particles, pet dander, mold, and other toxic chemicals, while the antibacterial targets bacteria and germs.

Otherwise, the design is fairly simple. It has a helpful display, physical buttons, and a remote control. The HSP001 lacks app connectivity but offers an auto mode to make the device more hands-free. Coverage is solid with CADR of 160 CFM that can cover 700 sq. ft.

Hathaspace HSP001 internal fan
Hathaspace HSP001 internal fan

Annual maintenance is slightly more expensive than some, but far cheaper than others. Overall, it’s a great device all around. If the additional filters appeal to you, then it’s a great option for this coverage area.

Test TypeTest Data
PM2.5 (2 hour test)0.2 ppm
PM10 (2 hour test)0.2 ppm
Particles (2 hour test)19
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Cold Catalyst, Antibacterial
Coverage Area700 sq. ft. (65 sq. m.)
CADR160 CFM
Max Wind Speed10.9 mph (17.5 kph)
Noise Test57.9 dB

BlueAir Pure 211+

Blueair Pure 211+
96 Purification
96 Build Quality
92 Noise
92 Usability
96 Maintenance
95.6 Overall Score
Tested With Scoring System 1.1

Best For

  • Great performance, reaching 0.2 in 1 hour
  • Simple design
  • Customizable color options

Considerations

  • Lacks auto mode or app connectivity
  • Can be difficult to carry

Why It’s Best

The BlueAir Pure 211+ keeps things simple with a medium-sized air purifier that has a colored fabric pre-filter. This cover adds a little customization in the color choice of your device. Beyond that, there is a single button to control the device, no remote controls, and no app connectivity.

In testing, it brought PM2.5 and PM10 down to 0.2 in 1 hour and generated no ozone. This performance is thanks to a 360 degree air intake and high-quality filtration system. It utilizes HEPA as the main filter, with assistance for odors from activated carbon.

An added bonus is the relatively cheap maintenance costs. Replacement filters are quite cheap and when you consider the CADR, you get an effective system for the price.

Filter Type: HEPA
Coverage Area: 540 sq. ft.
CADR: 350 CFM

While it falls on the lower end of this coverage area range, the BlueAir Pure 211+ is still a fantastic air purifier. In our tests, both PM2.5 and PM10 were reduced to 0.2 in 1 hour. After the second hour, PM2.5 was further reduced to 0.1. Its 1-hour performance results are 0.38 better than the average air purifier we test. In addition, the BlueAir produced no measurable ozone.

Blue Air Pure 211+ no fabric pre-filter
Blue Air Pure 211+ no fabric pre-filter

The design is simple, housing a 1-button design for all functionality. There is no remote control or app connectivity for BlueAir and no auto mode. However, for a little added flair of customization, you can choose the color of the fabric pre-filter that encases the device.

Blue Air Pure 211+ blue fabric pre-filter
Blue Air Pure 211+ blue fabric pre-filter
Blue Air Pure 211+ black fabric pre-filter
Blue Air Pure 211+ black fabric pre-filter

It’s a fairly large device, considering the coverage area, and can be somewhat difficult to move around due to the fabric cover. However, its simplicity is its charm. Maintenance is easy and replacement filters are inexpensive, especially considering the 350 CFM CADR of the device. While it only covers 540 sq. ft., it does so effectively and relatively quietly at 59.9 dB on the highest fan speed.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.2 ppm
Particles (2 hour test)15
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter
Coverage Area540 sq. ft. (50 sq. m.)
CADR350 CFM
Max Wind Speed9.6 mph (15.4 kph)
Noise Test59.9 dB

Medium Rooms (250 – 500 sq. ft.)

Let’s bring the coverage down even further and talk about the air purifiers best for medium sized rooms, in the 250 – 500 square foot range. 

Coway 1512HH

Coway 1512hh
94 Purification
92 Build Quality
83 Noise
92 Usability
96 Maintenance
93.7 Overall Score
Tested With Scoring System 1.1

Best For

  • Real-time air quality detection with indicator lights
  • Auto-mode functionality
  • Solid purification performance reducing PM2.5 and PM10 down to 0.3

Considerations

  • Lacks app connectivity or remote control

Why It’s Best

The Coway 1512HH is a simple device. It’s equipped with some advanced features, including auto mode and air quality detection, but lacks any form of smart, app, or wireless control. In addition, the filters don’t include any surprises, instead using tried and tested HEPA, carbon, and an optional negative ion generator.

In testing, the Coway reduced PM2.5 and PM10 down to 0.3 after the first hour. These results weren’t perfect, but well within healthy breathing levels. In addition, there was no ozone detected during our testing.

While it may lack more bleeding edge features, the Coway strikes a balance between simplicity and effectiveness, making it a great value pick.

Filter Type: HEPA
Coverage Area: 360 sq. ft.
CADR: 246 CFM

Coway’s 1512HH air purifier is a simply designed device that includes some nice usability features, but forgoes many others. It has sensors that detect the surrounding air quality and it can use those to automatically adjust fan speed as needed. Additionally, it notifies the user via a light on the control panel.

Control panel for the Coway 1512HH air purifier
Controls on the Coway AP 1512HH air purifier

Housing a HEPA, carbon filter, and optional ionizer, the Coway had solid performance in our tests. No ozone was detected, and PM2.5 and PM10 were reduced to 0.3 after 1 hour. The following hour showed improved results, with a PM2.5 and PM10 of 0.1.

What really sets the Coway apart from the rest is how cost-effective it is considering its CADR and filter replacement costs. For reference, the average air purifier we test has an efficiency of $0.35/CFM. The Coway is far more efficient at $0.07/CFM , $0.28/CFM better than the testing average. Replacement filters are cheap and you get a lot of bang for your buck.

Coway air purifier filtration process
Coway filters – air purifier

This is shown with a surprisingly high CADR of 246 CFM, which equates to a coverage level of 360 sq. ft. with 4 air changes per hour. Depending on your needs, the Coway can cover a larger area of 874 sq. ft. with 2 air changes.

At the end of the day, the Coway 1512HH may not have the newest features or reach levels of purification perfection we see with other devices. But it is incredibly budget-friendly and still a great performer.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.1 ppm
Particles (2 hour test)49
AQI (2 hour test)2
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Ionizer
Coverage Area360 sq. ft. (33 sq. m.)
CADR246 CFM
Max Wind Speed23.0 mph (37.0 kph)
Noise Test68.5 dB

Winix 5500-2

Winix 5500-2
98 Purification
92 Build Quality
84 Noise
92 Usability
96 Maintenance
96.2 Overall Score
Tested With Scoring System 1.1

Best For

  • Air quality detection which enables auto mode
  • Remote control for wireless functionality
  • Optional ionizer
  • Practically perfect performance with a PM2.5 of 0.1

Considerations

  • Lacks app connectivity
  • Larger body than other air purifiers in this coverage range

Why It’s Best

The Winix 5500-2 is a mid-sized air purifier designed to cover medium-sized areas. It packs a healthy amount of features that make the device more user-friendly, including air quality sensors, auto-mode, and remote control. Inside, it houses a 3-part filtration system, including HEPA, carbon, and their optional ionizer called “Plasmawave”.

A combination of these filters works well, reducing PM2.5 and PM10 down to 0.1 in our tests. Additionally, we measured no ozone with the optional ionizer turned on.

Overall, the Winix 5500-2 is a solid all-around air purifier, with great performance, useful features, and excellent value across the board.

Filter Type: HEPA
Coverage Area: 360 sq. ft.
CADR: 243 CFM

When it comes to deciding on a great all-around device in this coverage range, it really doesn’t get better than the Winix 5500-2. It packs a smaller coverage area of 360 sq. ft. with a CADR of 243 CFM. That said, it is capable of covering a larger area if needed but with fewer air changes per hour.

Filters on the Winix 5500-2 air purifier
Filters on the Winix 5500-2 air purifier

In addition, the Winix packs many useful usability features that make the device more hands-free. It houses sensors that can measure the surrounding air quality, show this to the user via colored indicator lights, and automatically adjust the fan speed if in auto mode.

The Winix also includes an optional ionizer they call “Plasmawave” alongside their other main HEPA and carbon filters. This combination works well, reducing both PM2.5 and PM10 down to 0.1 after 1 hour. In addition, we measured no ozone during this testing period as well.

Controls on top of the Winix 5500-2 air purifier
Controls on top of the Winix 5500-2 air purifier

Overall, the Winix 5500-2 is an incredibly effective device and fairly cost-effective to maintain throughout its lifetime. If you want an air purifier that can do a little bit of everything, then this is a solid pick.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.2 ppm
Particles (2 hour test)49
AQI (2 hour test)1
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter, Ionizer
Coverage Area360 sq. ft. (33 sq. m.)
CADR243 CFM
Max Wind Speed13.9 mph (22.4 kph)
Noise Test67.7 dB

Small Rooms (1 – 250 sq. ft.)

Finally, let’s take a look at the air purifiers best suited for small rooms.

Levoit Core 300s

Levoit Core 300s
96 Purification
94 Build Quality
87 Noise
92 Usability
96 Maintenance
95.2 Overall Score
Tested With Scoring System 1.1

Best For

  • Great choice for small areas with a coverage of 215 sq. ft.
  • Lightweight and easily maneuverable
  • Auto-mode, real-time air quality monitoring, and app connectivity
  • Solid purification reducing PM2.5 and PM10 to 0.2

Considerations

  • Non “S” version lacks app connectivity and auto-mode

Why It’s Best

The Levoit Core 300s is a small air purifier designed to cover small areas. With a 360 degree air intake, it can cover up to 215 sq. ft. with a CADR of 141 CFM. It’s packed full of features including an auto mode, app connectivity, real-time air quality monitoring, and more.

Performance was great for a device of this size, reducing PM2.5 down to 0.2 after 1 hour. In addition, no ozone was generated during testing. Maintenance costs are cheaper than the average air purifier we test, but slightly more expensive than some, considering the coverage area.

That said, it is still a fantastic air purifier. For this coverage range, no other air purifier comes close to this level of performance at this price point.

Filter Type: HEPA
Coverage Area: 215 sq. ft.
CADR: 141 CFM

At this level of coverage, there is only one choice, and it’s the Levoit Core 300s. It’s filled with useful features including an auto mode, sensors to detect current air quality, and a detailed app. In addition, it packs a single filtration unit that houses a pre-filter, HEPA-like, and carbon filter. 

Levoit Core 300s Removing Filter
Levoit Core 300S removing filter

The 300s had excellent results in testing. Thanks to the 360 degree air intake and high-quality filters, it reduced PM2.5 to 0.2 and PM10 to 0.3 after 1 hour. The second hour showed decreased numbers, down to 0.1 for both PM2.5 and PM10. Additionally, no measurable ozone was detected during our testing.

Coverage area for the 300s is great for small areas or single rooms. It has a CADR of 141 CFM which equates to 215 sq. ft. of coverage area. Maintenance costs are also quite cheap, being more cost-effective than the average air purifier we test.

Levoit Core 300S controls
Levoit Core 300S controls

While there are other air purifiers in this coverage range, nothing stands close to the success of the Levoit Core 300s. Its excellent performance, feature-packed design, and relatively cheap maintenance costs, make it the absolute best option for small room coverage.

Test TypeTest Data
PM2.5 (2 hour test)0.1 ppm
PM10 (2 hour test)0.1 ppm
Particles (2 hour test)16
AQI (2 hour test)2
Ozone Detected0.0 ppm
Filter TypeHEPA, Carbon, Pre-Filter
Coverage Area215 sq. ft. (20 sq. m.)
CADR141 CFM
Max Wind Speed9.5 mph (15.3 kph)
Noise Test65.1 dB

Other Levoit Air Purifiers

Levoit has a multitude of other air purifiers they offer, ranging from the smallest to largest coverage areas.

Air PurifierPM2.5PM10OzoneCoverage (sq. ft.)CADR (CFM)Max Wind Speed (mph)Max Noise (dB)Recurring Costs / CFM
Levoit LV-H1340.10.1Unknown710312UnknownUnknown$0.22
Levoit Core 600s0.40.4Unknown635410UnknownUnknown$0.15
Levoit Everest Air0.10.2Unknown558360Unknown53.2$0.28
Levoit LV-H1330.50.7Unknown538275UnknownUnknown$0.23
Levoit Vital 1000.30.3Unknown500130UnknownUnknown$0.25
Levoit Core 400s0.10.3Unknown403260UnknownUnknown$0.19
Levoit LV-PUR1310.20.2Unknown322135UnknownUnknown$0.34
Levoit Core P3500.91.3Unknown219145UnknownUnknown$0.21
Levoit Core 200s0.50.5Unknown183118UnknownUnknown$0.22
Levoit LV-H1321.42.4Unknown12970UnknownUnknown$1.29

We’ve tested quite a few of them and they all offer a fairly similar feature set.

Purification Test Comparison

Purification was excellent across the board for every air purifier on this list. The primary criteria we focused on when choosing devices were the PM2.5 purification performance and the ozone generation. We test purification performance using a 2-hour test that measures the air purifier’s ability to clean the surrounding air. In addition, we measure ozone levels during this time, making sure any optional ionizers or other features that could potentially produce ozone are turned on.

Air PurifierBaseline PM2.5Baseline PM10Baseline ParticlesBaseline AQI1 Hour PM2.51 Hour PM101 Hour Particles1 Hour AQI2 Hour PM2.52 Hour PM102 Hour Particles2 Hour AQIPre-test OzonePost-test Ozone
AirDoctor 5500i31.854.54279920.10.11410.10.133200
Medify MA-11247.278.581891290.10.17420.10.114100
Oransi Mod+90.3159.5113731680.10.21610.10.215100
IQAir HealthPro Plus15.625.62259580.10.21210.10.218100
Rabbit Air A375.4126.5138031610.10.14320.10.210100
Shark 3-in-1 Max19.730.74144660.20.24910.10.212100
Alen BreatheSmart 45i38.666.583051080.20.24320.10.129200
Hathaspace HSP00136.258.867541020.20.26920.20.219100
BlueAir Pure 211+44.475.668041220.20.21910.10.215100
Coway 1512HH129.6224.5195231890.30.35910.10.149200
Winix 5500-249.982.993391360.10.1910.10.249100
Levoit Core 300s38.062.175121070.20.34420.10.116200
Average Air Purifier20.534.52912550.490.746420.140.2133100

Across the board, every air purifier on this list reduced PM2.5 to 0.3 or below after 1 hour. In addition, our ozone meter measured no detectable levels of ozone by any air purifier. Please note, our ozone meter measures ozone levels down to a resolution 0.1 parts per million. The worst performers of this group was the Coway 1512HH. The Coway was able to reach a PM2.5 and PM10 of 0.3 after 1 hour, but further reduced it to 0.1 after 2 hours. That said, the “worst” is relative, as even these performances are extremely good by most standards.

Air Quality Pm 25 Index

Many other air purifiers achieved practically perfect results, being able to reduce PM2.5 and PM10 down to 0.1 after the first hour. That said, all of the air purifiers were tested in the same room regardless of their designated coverage area. Larger coverage devices seemed to more consistently land at the 0.1 mark, which makes sense, given their higher level of CADR.

Best Air Purifiers Ozone Meter
Best Air Purifiers Ozone Meter

Still, all of these devices were able to achieve air quality levels well within the healthy breathing levels, easily beating out the average purification performance, which only reaches a PM2.5 of 0.49 after 1 hour.

Filters & Cost Analysis

Each air purifier on this list includes filters to help achieve excellent purification performance. Across the board, all but the BlueAir and Levoit Core 300 utilize HEPA filters, with the majority also using carbon filters as well. However, many of these devices include optional ionizers, static electric filtration, and other filter types to further help to improve performance.

Air PurifierHEPAActivated CarbonIonizerOtherEstimated Recurring Costs / CFM3rd-Party Filters
AirDoctor 5500iYesYesYesn/a$0.47No
Medify MA-112YesYesYesUV-C$0.18Yes
Oransi Mod+YesYesNon/a$0.19
IQAir HealthPro PlusYesYesNon/a$1.12Yes
Rabbit Air A3YesYesYesMedium, Customized$0.41Yes
Shark 3-in-1 MaxYesYesNon/a$0.15Yes
Alen BreatheSmart 45iYesYesYesn/a$0.28Yes
Hathaspace HSP001YesYesNoCold-Catalyst, Antibacterial$0.21Yes
BlueAir Pure 211+HEPASilentYesNon/a$0.16Yes
Coway 1512HHYesYesYesn/a$0.07Yes
Winix 5500-2YesYesYesn/a$0.18Yes
Levoit Core 300sHEPA-LikeYesNon/a$0.21Yes
Average Air PurifierYesYesYesn/a$0.35n/a

What sets these devices apart from each other is how efficient they are to maintain according to their coverage area. The table above shows the recurring costs of maintaining the device annually by their CADR. As you can see, some devices are far more expensive to maintain than others.

IQAir HealthPro Plus pre-filter
IQAir HealthPro Plus pre-filter

The worst offenders are the IQAir Health Pro and the AirDoctor 5500, but the Health Pro is far worse. At $1.12/CFM, it is by far the most expensive device to maintain compared to the coverage area. The 5500 is not great either at $0.47/CFM, but nowhere near the level of the IQAir Health Pro.

Coway purifier filters - AP 1215HH
Side view of the Coway air purification filters

On the opposite end of things, the Coway 1512HH is the cheapest device on this list at $0.07/CFM, with the Shark 3-in-1 Max being in second place at $0.15/CFM.

Coverage Comparison

Higher or lower coverage areas are neither good nor bad, it is more a matter of preference and needs for the home. That said, some devices may be more cost-effective options for different coverage levels.

Air PurifierCoverage AreaCADRPrice / Coverage
AirDoctor 5500i2,002 sq. ft.534 CFM$0.55
Medify MA-1122,090 sq. ft.559 CFM$0.32
Oransi Mod+1,361 sq. ft.375 CFM$0.22
IQAir HealthPro Plus1,125 sq. ft.300 CFM$0.73
Rabbit Air A31,070 sq. ft.286 CFM$0.70
Shark 3-in-1 Max1,000 sq. ft.Unknown$0.38 (Estimation)
Alen BreatheSmart 45i800 sq. ft.245 CFM$0.54
Hathaspace HSP001700 sq. ft.160 CFM$0.29
BlueAir Pure 211+540 sq. ft.350 CFM$0.59
Coway 1512HH360 sq. ft.246 CFM$0.64
Winix 5500-2360 sq. ft.243 CFM$0.69
Levoit Core 300s215 sq. ft.141 CFM$0.70
Average Air Purifier741 sq. ft.290 CFMn/a

By far the most expensive device per its coverage area is the IQAir Health Pro at $0.73/sq. ft. with the second-place slot being filled by the Rabbit Air A3 at $0.70/sq. ft.

Oransi Mod+ Front With Filter
Oransi Mod+ Front With Filter

On the more budget-friendly side, we see the Oransi Mod+ being the most cost-effective at $0.22/sq. ft. with the Hathaspace HSP001 being only $0.07/sq. ft. behind the Oransi.

Wind Speed Test Comparison

In addition to documenting their coverage levels, we also measure the wind speed generated by each device as it operates. We use an anemometer placed directly on the air vents of the air purifier and measure the speed of the wind generated at the lowest and highest fan speeds.

Air PurifierMin Wind SpeedMax Wind Speed
AirDoctor 5500i2.5 mph15.2 mph
Medify MA-1123.1 mph10.4 mph
Oransi Mod+3.6 mph13.1 mph
IQAir HealthPro Plus0.9 mph9.8 mph
Rabbit Air A34.5 mph17.3 mph
Shark 3-in-1 Max1.1 mph11.4 mph
Alen BreatheSmart 45i2.5 mph8.7 mph
Hathaspace HSP0014.6 mph10.9 mph
BlueAir Pure 211+4.6 mph9.6 mph
Coway 1512HH6.3 mph23.0 mph
Winix 5500-25.6 mph13.9 mph
Levoit Core 300s4.7 mph9.5 mph
Average Air Purifier3.7 mph12.2 mph

Surprisingly, the fastest speeds we measured came from the Coway 1512HH with a measured speed of 23.0 mph on its highest fan speeds. This is 10.71 mph faster than the average air purifier we test, as a reference.

On the other hand, the IQAir Health Pro created the slowest wind speeds on both its highest and lowest operating levels. When at max speed, it generates 9.8 mph whereas while at the slowest speed, it only generates wind speeds of 0.9 mph. 

Noise Comparison

Noise levels are also an important factor for air purifiers. The table below indicates noise levels at max power for each air purifier.

Air PurifierAmbient NoiseMin NoiseMax Noise
AirDoctor 5500i44.2 dB44.4 dB66.9 dB
Medify MA-11239.1 dB41.5 dB64.4 dB
Oransi Mod+43.0 dB43.3 dB65.8 dB
IQAir HealthPro Plus39.1 dB41.2 dB69.2 dB
Rabbit Air A339.1 dB39.7 dB65.0 dB
Shark 3-in-1 Max39.5 dB39.7 dB59.3 dB
Alen BreatheSmart 45i41.2 dB41.3 dB53.4 dB
Hathaspace HSP00139.1 dB40.5 dB57.9 dB
BlueAir Pure 211+39.1 dB42.7 dB59.9 dB
Coway 1512HH39.1 dB41.5 dB68.5 dB
Winix 5500-239.1 dB44.8 dB67.7 dB
Levoit Core 300s39.1 dB44.3 dB65.1 dB
Average Air Purifier39.8 dB42.7 dB62.2 dB

The quietest air purifiers while running on their highest fan speeds were the Hathaspace HSP001, Shark 3-in-1 Max, Alen Breathesmart 45i, and BlueAir Pure 211+. All of these air purifiers kept noise levels under 60 dB while on their max operating fan speeds, which the 45i being the quietest at 53.4 dB

Hathaspace air purifier design

However, if you are looking for the absolute quietest device you can get regardless of fan speed, it would be a tie between the Shark 3-in-1 Max and Rabbit Air A3. Both had noise levels at 39.7 dB while on their lowest fan speeds.

How We Test

We test and score air purifiers using a battery of 11 data-driven tests. Our tests are a mix of objective testing and subjective assessment, taking into consideration purification performance, ozone generation, build and filter quality, cost-effectiveness, usability, and maintenance.

Air Purifiers Overall Scores
Air Purifiers Overall Scores

To choose the best air purifiers, we based our selections on the top-performing / highest-scoring air purifiers according to our objective testing. These tests analyze the device’s performance across these 5 critical factors.

Additionally, price and value were also taken into consideration. While there are other air purifiers that could have appeared on our list, we wanted to include the best options available for different price ranges.

Our testing process is detailed and rigorous. The links below have detailed write-ups and graphs to explain our testing process, scoring formulas, and the criteria for how we choose the best air purifiers.

How We Test & Score
How We Test & Score Air Purifiers

All Air Purifiers Reviews

ModelScorePriceReview
Aeris Air0.1$$$$Read Review
Air Health Skye0.1$$$Read Review
AirDoctor 3500i0.1$$$$Read Review
AirDoctor 55000.1$$$$Read Review
AirDoctor 5500i0.1$$$$Read Review
AirDoctor 10000.1$$Read Review
AirDoctor 20000.1$$Read Review
AirDoctor 30000.1$$$Read Review
AirDoctor 50000.1$$$$Read Review
DIY - Corsi Box0.1$Read Review
IQAir Atem X0.1$$$$Read Review
IQAir Health Pro0.1$$$$Read Review
IQAir GC MultiGas0.1$$$$Read Review
Jya Fjord0.1$$Read Review
Levoit Core 400s0.1$Read Review
Levoit Everest Air0.1$$Read Review
Levoit LV-H1340.1$$Read Review
Medify MA-1120.1$$$Read Review
Medify MA-1250.1$$$Read Review
Medify MA-500.1$Read Review
Mila0.1$$Read Review
Oransi EJ1200.1$$$$Read Review
Oransi Mod0.1$$$Read Review
Oransi Mod+0.1$$$Read Review
Rabbit Air A30.1$$$Read Review
Rabbit Air MinusA20.1$$$Read Review
Shark NeverChange0.1$$Read Review
Smartmi P10.1$Read Review
TaoTronics TT-AP0030.1$Read Review
Toshiba CAF-Z85US0.1$$Read Review
TruSens Z-35000.1$$Read Review
Winix 5500-20.1$$Read Review
AirDoctor 2000i0.2$$Read Review
Air Oasis iAdaptAir L0.2$$$Read Review
Alen Breathesmart 45i0.2$$Read Review
Alen Breathesmart 75i0.2$$$Read Review
BlueAir Pure 211+0.2$$Read Review
Brio0.2$$$Read Review
Dyson Pure Cool TP020.2$$Read Review
Dyson Pure Cool TP040.2$$$Read Review
Hathaspace HSP0010.2$Read Review
Levoit Core 300/s0.2$Read Review
Levoit LV-PUR1310.2$$Read Review
Nash0.2$$Read Review
Okaysou Apollo 7180.2$Read Review
Oransi Mod jr.0.2$Read Review
Shark 3-in-1 Max0.2$$Read Review
TOSOT KJ350G0.2$Read Review
Coway 1512HH0.3$$Read Review
Dyson Pure Cool DP040.3$$$Read Review
IQAir Atem0.3$$Read Review
Levoit Vital 1000.3$Read Review
Molekule Air Pro0.3$$$Read Review
TCL Breeva A30.3$Read Review
Airdog X30.4$$Read Review
Bulex0.4$Read Review
Elechomes HC31010.4$Read Review
Hathaspace HSP0020.4$$Read Review
IKEA Fornufitg0.4$Read Review
Levoit Core 600s0.4$$Read Review
Xiaomi Smart Air Purifier Pro 40.4$$Read Review
GermGuardian AC48250.5$Read Review
Levoit Core 200s0.5$Read Review
Levoit LV-H1330.5$Read Review
Molekule Air Pro0.5$$Read Review
Roto KJ100G-C90.5$Read Review
SQAir0.5$Read Review
Toshiba Purego0.5$Read Review
Xiaomi Smart Air Purifier 4 Compact0.5$Read Review
Airdog Pro0.6$$$Read Review
Molekule0.6$$$Read Review
Molekule Mini/+0.6$$Read Review
Renpho0.7$Read Review
Clean-tech0.8$Read Review
Okaysou Mic40.8$Read Review
Aura Air0.9$$$Read Review
Levoit Core P3500.9$Read Review
LG PuriCare AeroTower0.9$$Read Review
OneLife X0.9$$$Read Review
EnviroKlenz1.0$$$Read Review
Renpho AP00011.1$Read Review
Levoit LV-H1321.4$Read Review
Rabbit Air BioGS SPA-625A1.8$$Read Review
Tenergy Renair1.8$Read Review
Airocide APS2002.6$$$$Read Review
Shark 3-in-12.6$$Read Review
Okaysou AirMax8L5.5$Read Review
Dyson Pure Cool TP06Unkown$$$$Read Review
Dyson Pure Cool DP01Unkown$$Read Review
Dyson Pure Cool TP07Unkown$$Read Review
Dyson Pure Hot + Cool HP06Unkown$$$Read Review
Dyson Pure Hot + Cool HP01Unkown$$Read Review
Dyson Pure Hot + Cool HP04Unkown$$Read Review
Dyson Pure Hot + Cool HP07Unkown$$$Read Review
Dyson Pure Hot + Cool PH01Unkown$$Read Review

Air Purifier Comparisons

More Resources

The Last Word

If you still are not sure which air purifier is the right choice for your home, please drop us a comment below or send us an email, and we’d be happy to help you decide.

In addition, if you feel like we’ve missed out on a particular model, let us know!

About Derek Hales

Derek HalesDerek Hales is the Founder and Editor-in-Chief of ModernCastle.com. He has been featured in Fast Company, Reader's Digest, Business Insider, Realtor.com, She Knows, and other major publications. Derek has a Bachelor's Degree in Business Administration from Kansas State University. Hales has been testing and reviewing products for the home since 2014.