The 12 Best Air Purifiers for 2024: 95 Purifiers Tested

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.

Air Doctor 5500/i

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter, Ionizer
Coverage Area	2,002 sq. ft. (186 sq. m.)
CADR	534 CFM
Max Wind Speed	15.2 mph (24.5 kph)
Noise Test	66.9 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 Purifier	PM2.5	PM10	Ozone	Coverage (sq. ft.)	CADR (CFM)	Max Wind Speed (mph)	Max Noise (dB)	Recurring Costs / CFM
AirDoctor 5000	0.1	0.1	0	2,002	534	19.5	65.7	$0.47
AirDoctor 3500i	0.1	0.2	0	1,274	340	15.6	66.8	$0.35
AirDoctor 3000	0.1	0.2	0	628	373	17.1	70.2	$0.41
AirDoctor 2000i	0.2	0.2	0	610	162	16.3	65.1	$0.56
AirDoctor 2000	0.1	0.1	0	610	162	15.2	60.3	$0.74
AirDoctor 1000	0.1	0.2	0	285	162	9.6	64.5	$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

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.

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter, Ionizer, UV-C
Coverage Area	2,500 sq. ft. (232 sq. m.)
CADR	559 CFM
Max Wind Speed	10.4 mph (16.7 kph)
Noise Test	64.4 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 Purifier	PM2.5	PM10	Ozone	Coverage (sq. ft.)	CADR (CFM)	Max Wind Speed (mph)	Max Noise (dB)	Recurring Costs / CFM
Medify MA-125	0.1	0.1	Unknown	4,100	547	Unknown	Unknown	$0.20
Medify MA-50	0.1	0.2	Unknown	1,100	295	Uknown	Uknown	$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+

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter
Coverage Area	1,361 sq. ft. (126 sq. m.)
CADR	375 CFM
Max Wind Speed	13.1 mph (21.1 kph)
Noise Test	65.8 dB

Other Oransi Air Purifiers

Air Purifier	PM2.5	PM10	Ozone	Coverage (sq. ft.)	CADR (CFM)	Max Wind Speed (mph)	Max Noise (dB)	Recurring Costs / CFM
Oransi EJ120	0.1	0.1	Unknown	1,250	330	Unknown	Unknown	$0.53
Oransi Mod	0.1	0.1	0	1,250	338	10.7	66.4	$0.18
Oransi Mod jr.	0.2	0.2	Unknown	878	251	Unknown	Unknown	$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

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.

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter
Coverage Area	1,240 sq. ft. (115 sq. m.)
CADR	330 CFM
Max Wind Speed	7.8 mph (12.6 kph)
Noise Test	69.2 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 Purifier	PM2.5	PM10	Ozone	Coverage (sq. ft.)	CADR (CFM)	Max Wind Speed (mph)	Max Noise (dB)	Recurring Costs / CFM
IQAir Atem X	0.1	0.1	0	1,650	440	12.5	65.1	$0.45
IQAir GC MultiGas	0.1	0.2	0	1,125	300	7.1	67.7	$0.26
IQAir Atem	0.3	0.3	Unknown	150	39	Unknown	Unknown	$2.03

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

Location	Baseline PM2.5	Baseline PM10	Baseline Particles	Baseline AQI	After PM2.5	After PM10	After Particles	After AQI
Kitchen	2.2	3.7	374	12	0.7	1.1	144	3
Living Room	2.5	4.3	294	11	0.6	1.1	114	2
Kid’s Room 1	4.3	8.0	414	12	0.4	0.4	44	1
Kid’s Room 2	3.2	5.6	396	12	0.4	0.7	98	2
Master Bedroom	2.2	3.7	319	10	0.2	0.4	119	1
Office	2.9	5.1	356	12	0.6	1.1	164	3

Rabbit Air A3

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.

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.

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter, Ionizer, Medium, Customized
Coverage Area	1,070 sq. ft. (99 sq. m.)
CADR	286 CFM
Max Wind Speed	17.3 mph (27.8 kph)
Noise Test	65.0 dB

Other Rabbit Air Air Purifiers

Air Purifier	PM2.5	PM10	Ozone	Coverage (sq. ft.)	CADR (CFM)	Max Wind Speed (mph)	Max Noise (dB)	Recurring Costs / CFM
Rabbit Air MinusA2	0.1	0.1	Unknown	815	218	Unknown	Unknown	$0.44
Rabbit Air BioGS	1.8	3.3	Unknown	625	147	Unknown	Unknown	$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

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter
Coverage Area	1,000 sq. ft. (93 sq. m.)
CADR	300 CFM
Max Wind Speed	11.4 mph (18.3 kph)
Noise Test	59.3 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 Purifier	PM2.5	PM10	Ozone	Coverage (sq. ft.)	CADR (CFM)	Max Wind Speed (mph)	Max Noise (dB)	Recurring Costs / CFM
Shark NeverChange	0.1	0.2	0	1,400	Unknown	8.9	53.3	Unknown
Shark 3-in-1	2.6	4.5	0	500	Unknown	7.1	54.3	Unknown

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

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter, Ionizer
Coverage Area	800 sq. ft. (74 sq. m.)
CADR	245 CFM
Max Wind Speed	8.7 mph (14.0 kph)
Noise Test	53.4 dB

Hathaspace HSP001

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.

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter, Cold Catalyst, Antibacterial
Coverage Area	700 sq. ft. (65 sq. m.)
CADR	160 CFM
Max Wind Speed	10.9 mph (17.5 kph)
Noise Test	57.9 dB

BlueAir Pure 211+

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.

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter
Coverage Area	540 sq. ft. (50 sq. m.)
CADR	350 CFM
Max Wind Speed	9.6 mph (15.4 kph)
Noise Test	59.9 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’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.

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter, Ionizer
Coverage Area	360 sq. ft. (33 sq. m.)
CADR	246 CFM
Max Wind Speed	23.0 mph (37.0 kph)
Noise Test	68.5 dB

Winix 5500-2

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.

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter, Ionizer
Coverage Area	360 sq. ft. (33 sq. m.)
CADR	243 CFM
Max Wind Speed	13.9 mph (22.4 kph)
Noise Test	67.7 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

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. 

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.

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 Type	Test 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 Detected	0.0 ppm
Filter Type	HEPA, Carbon, Pre-Filter
Coverage Area	215 sq. ft. (20 sq. m.)
CADR	141 CFM
Max Wind Speed	9.5 mph (15.3 kph)
Noise Test	65.1 dB

Other Levoit Air Purifiers

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

Air Purifier	PM2.5	PM10	Ozone	Coverage (sq. ft.)	CADR (CFM)	Max Wind Speed (mph)	Max Noise (dB)	Recurring Costs / CFM
Levoit LV-H134	0.1	0.1	Unknown	710	312	Unknown	Unknown	$0.22
Levoit Core 600s	0.4	0.4	Unknown	635	410	Unknown	Unknown	$0.15
Levoit Everest Air	0.1	0.2	Unknown	558	360	Unknown	53.2	$0.28
Levoit LV-H133	0.5	0.7	Unknown	538	275	Unknown	Unknown	$0.23
Levoit Vital 100	0.3	0.3	Unknown	500	130	Unknown	Unknown	$0.25
Levoit Core 400s	0.1	0.3	Unknown	403	260	Unknown	Unknown	$0.19
Levoit LV-PUR131	0.2	0.2	Unknown	322	135	Unknown	Unknown	$0.34
Levoit Core P350	0.9	1.3	Unknown	219	145	Unknown	Unknown	$0.21
Levoit Core 200s	0.5	0.5	Unknown	183	118	Unknown	Unknown	$0.22
Levoit LV-H132	1.4	2.4	Unknown	129	70	Unknown	Unknown	$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.

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.

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.

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.

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.

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.

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 Purifier	Coverage Area	CADR	Price / Coverage
AirDoctor 5500i	2,002 sq. ft.	534 CFM	$0.55
Medify MA-112	2,090 sq. ft.	559 CFM	$0.32
Oransi Mod+	1,361 sq. ft.	375 CFM	$0.22
IQAir HealthPro Plus	1,125 sq. ft.	300 CFM	$0.73
Rabbit Air A3	1,070 sq. ft.	286 CFM	$0.70
Shark 3-in-1 Max	1,000 sq. ft.	Unknown	$0.38 (Estimation)
Alen BreatheSmart 45i	800 sq. ft.	245 CFM	$0.54
Hathaspace HSP001	700 sq. ft.	160 CFM	$0.29
BlueAir Pure 211+	540 sq. ft.	350 CFM	$0.59
Coway 1512HH	360 sq. ft.	246 CFM	$0.64
Winix 5500-2	360 sq. ft.	243 CFM	$0.69
Levoit Core 300s	215 sq. ft.	141 CFM	$0.70
Average Air Purifier	741 sq. ft.	290 CFM	n/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.

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 Purifier	Min Wind Speed	Max Wind Speed
AirDoctor 5500i	2.5 mph	15.2 mph
Medify MA-112	3.1 mph	10.4 mph
Oransi Mod+	3.6 mph	13.1 mph
IQAir HealthPro Plus	0.9 mph	9.8 mph
Rabbit Air A3	4.5 mph	17.3 mph
Shark 3-in-1 Max	1.1 mph	11.4 mph
Alen BreatheSmart 45i	2.5 mph	8.7 mph
Hathaspace HSP001	4.6 mph	10.9 mph
BlueAir Pure 211+	4.6 mph	9.6 mph
Coway 1512HH	6.3 mph	23.0 mph
Winix 5500-2	5.6 mph	13.9 mph
Levoit Core 300s	4.7 mph	9.5 mph
Average Air Purifier	3.7 mph	12.2 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 Purifier	Ambient Noise	Min Noise	Max Noise
AirDoctor 5500i	44.2 dB	44.4 dB	66.9 dB
Medify MA-112	39.1 dB	41.5 dB	64.4 dB
Oransi Mod+	43.0 dB	43.3 dB	65.8 dB
IQAir HealthPro Plus	39.1 dB	41.2 dB	69.2 dB
Rabbit Air A3	39.1 dB	39.7 dB	65.0 dB
Shark 3-in-1 Max	39.5 dB	39.7 dB	59.3 dB
Alen BreatheSmart 45i	41.2 dB	41.3 dB	53.4 dB
Hathaspace HSP001	39.1 dB	40.5 dB	57.9 dB
BlueAir Pure 211+	39.1 dB	42.7 dB	59.9 dB
Coway 1512HH	39.1 dB	41.5 dB	68.5 dB
Winix 5500-2	39.1 dB	44.8 dB	67.7 dB
Levoit Core 300s	39.1 dB	44.3 dB	65.1 dB
Average Air Purifier	39.8 dB	42.7 dB	62.2 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

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.

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

Model	Score	Price	Review
Aeris Air	0.1	$$$$	Read Review
Air Health Skye	0.1	$$$	Read Review
AirDoctor 3500i	0.1	$$$$	Read Review
AirDoctor 5500	0.1	$$$$	Read Review
AirDoctor 5500i	0.1	$$$$	Read Review
AirDoctor 1000	0.1	$$	Read Review
AirDoctor 2000	0.1	$$	Read Review
AirDoctor 3000	0.1	$$$	Read Review
AirDoctor 5000	0.1	$$$$	Read Review
DIY - Corsi Box	0.1	$	Read Review
IQAir Atem X	0.1	$$$$	Read Review
IQAir Health Pro	0.1	$$$$	Read Review
IQAir GC MultiGas	0.1	$$$$	Read Review
Jya Fjord	0.1	$$	Read Review
Levoit Core 400s	0.1	$	Read Review
Levoit Everest Air	0.1	$$	Read Review
Levoit LV-H134	0.1	$$	Read Review
Medify MA-112	0.1	$$$	Read Review
Medify MA-125	0.1	$$$	Read Review
Medify MA-50	0.1	$	Read Review
Mila	0.1	$$	Read Review
Oransi EJ120	0.1	$$$$	Read Review
Oransi Mod	0.1	$$$	Read Review
Oransi Mod+	0.1	$$$	Read Review
Rabbit Air A3	0.1	$$$	Read Review
Rabbit Air MinusA2	0.1	$$$	Read Review
Shark NeverChange	0.1	$$	Read Review
Smartmi P1	0.1	$	Read Review
TaoTronics TT-AP003	0.1	$	Read Review
Toshiba CAF-Z85US	0.1	$$	Read Review
TruSens Z-3500	0.1	$$	Read Review
Winix 5500-2	0.1	$$	Read Review
AirDoctor 2000i	0.2	$$	Read Review
Air Oasis iAdaptAir L	0.2	$$$	Read Review
Alen Breathesmart 45i	0.2	$$	Read Review
Alen Breathesmart 75i	0.2	$$$	Read Review
BlueAir Pure 211+	0.2	$$	Read Review
Brio	0.2	$$$	Read Review
Dyson Pure Cool TP02	0.2	$$	Read Review
Dyson Pure Cool TP04	0.2	$$$	Read Review
Hathaspace HSP001	0.2	$	Read Review
Levoit Core 300/s	0.2	$	Read Review
Levoit LV-PUR131	0.2	$$	Read Review
Nash	0.2	$$	Read Review
Okaysou Apollo 718	0.2	$	Read Review
Oransi Mod jr.	0.2	$	Read Review
Shark 3-in-1 Max	0.2	$$	Read Review
TOSOT KJ350G	0.2	$	Read Review
Coway 1512HH	0.3	$$	Read Review
Dyson Pure Cool DP04	0.3	$$$	Read Review
IQAir Atem	0.3	$$	Read Review
Levoit Vital 100	0.3	$	Read Review
Molekule Air Pro	0.3	$$$	Read Review
TCL Breeva A3	0.3	$	Read Review
Airdog X3	0.4	$$	Read Review
Bulex	0.4	$	Read Review
Elechomes HC3101	0.4	$	Read Review
Hathaspace HSP002	0.4	$$	Read Review
IKEA Fornufitg	0.4	$	Read Review
Levoit Core 600s	0.4	$$	Read Review
Xiaomi Smart Air Purifier Pro 4	0.4	$$	Read Review
GermGuardian AC4825	0.5	$	Read Review
Levoit Core 200s	0.5	$	Read Review
Levoit LV-H133	0.5	$	Read Review
Molekule Air Pro	0.5	$$	Read Review
Roto KJ100G-C9	0.5	$	Read Review
SQAir	0.5	$	Read Review
Toshiba Purego	0.5	$	Read Review
Xiaomi Smart Air Purifier 4 Compact	0.5	$	Read Review
Airdog Pro	0.6	$$$	Read Review
Molekule	0.6	$$$	Read Review
Molekule Mini/+	0.6	$$	Read Review
Renpho	0.7	$	Read Review
Clean-tech	0.8	$	Read Review
Okaysou Mic4	0.8	$	Read Review
Aura Air	0.9	$$$	Read Review
Levoit Core P350	0.9	$	Read Review
LG PuriCare AeroTower	0.9	$$	Read Review
OneLife X	0.9	$$$	Read Review
EnviroKlenz	1.0	$$$	Read Review
Renpho AP0001	1.1	$	Read Review
Levoit LV-H132	1.4	$	Read Review
Rabbit Air BioGS SPA-625A	1.8	$$	Read Review
Tenergy Renair	1.8	$	Read Review
Airocide APS200	2.6	$$$$	Read Review
Shark 3-in-1	2.6	$$	Read Review
Okaysou AirMax8L	5.5	$	Read Review
Dyson Pure Cool TP06	Unkown	$$$$	Read Review
Dyson Pure Cool DP01	Unkown	$$	Read Review
Dyson Pure Cool TP07	Unkown	$$	Read Review
Dyson Pure Hot + Cool HP06	Unkown	$$$	Read Review
Dyson Pure Hot + Cool HP01	Unkown	$$	Read Review
Dyson Pure Hot + Cool HP04	Unkown	$$	Read Review
Dyson Pure Hot + Cool HP07	Unkown	$$$	Read Review
Dyson Pure Hot + Cool PH01	Unkown	$$	Read Review

Air Purifier Comparisons

• Best Dyson Air Purifier
• Dyson Pure Cool
• Dyson Pure Hot & Cool
• Molekule vs. Dyson
• Molekule Air
• AirDoctor
• Levoit Air Purifiers

More Resources

• How to Smoke in Your Room Without Smelling It
• Do Air Purifiers Remove Odors?
• Air Ionizer Dangers: Are Ionic Air Purifiers Safe?
• Best Robot Vacuum
• Best Vacuum Cleaners

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!