Best air purifiers in 2024 tested and rated

How we test air purifiers

Here are some of the criteria we use when testing air purifiers. For more detail, check out the "how we test" section.
• CADR Rate:
How many cubic feet of air the purifier can clean per minute?
• Energy efficiency: How much power does an air purifier use?
• Noise level: How loud is the air purifier when it's running?
• Ease of use: Is it simple to set up and operate?
• Cost of replacement filters: What are the long-term costs?

If you want clean air at home, free from pollution and pollen, then one of the best air purifiers is what you need. When running, these devices will filter airborne contaminants from your air, venting clean air back into the room. That means an air purifier can help deodorize the space and clean your air. But how can you tell if you’re buying the right model? That’s where we can help you out. 

After testing a range of air purifiers, we think the best for most people is the Blueair Blue Pure 211+ Auto, as it was attractive, easy to use, and was effective and efficient at purifying air in a large room. If you want something cheaper, the Clorox Large Room True HEPA Air Purifier costs about $100 less, yet is also very good at cleaning the air.

To test the performance of the air purifiers on this list, we looked at their CADR (Clean Air Delivery Rate), which is a measure of the rate at which these machines can filter the air in a measured space, with separate readings across dust, smoke and pollen. We then put the air purifiers to the test in real-world conditions to see how well they stood up to everyday use. As part of our evaluations, we also looked at its design, including noise, energy, ease of use (including initial set-up and any corresponding app) and filter accessibility. 

So, whether you’re looking for a compact design, large room coverage, energy efficiency or smart features, we’ve got an air purifier that’s right for your needs. 


The best air purifiers you can buy today

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Best overall

Best air purifier overall

Specifications

Dimensions: 20 x 13 x 13 inches
Weight: 12.5 pounds
Suggested room size: 550 square feet
Filters: Particle/carbon/HEPASilent
CADR (smoke/dust/pollen): 353/347/380
Speeds: Three speeds and an auto mode
Noise level (dB): 35.6/60.8
Energy use (24 hours): 0.159 kWh
Warranty: One year

Reasons to buy

+
Cleans air efficiently
+
Uses power well
+
Great for large spaces

Reasons to avoid

-
Larger footprint
-
Night mode lacks power
Buy it if

 You want a strong air purifier: This air purifier achieved an average CADR of 360 across dust, smoke and pollen — the highest rating of those I tested. This means the Blueair Blue Pure 211+ can handle rooms up to 550 sq ft.  

 You want ease of use: The Blueair Blue Pure 211+ Auto comes with enough features to suit everyday operation, including three fan speeds, an auto mode and a night mode. It’s very straightforward to operate and not overly-complicated in its design.

 You want to customize your air purifier: The skirt on the lower half of this air purifier comes in several colors, including pink, blue, green and gray, so you can customize it to suit your décor or personality. 

Don't buy it if:

❌ You’re tight for space: This air purifier measures 20 x 13 x 13 inches and weighs 12.5 pounds, so it's a hefty design which will take up some room. It will be more obvious to the eye at this size as well.  

❌ You want a strong night mode: Night mode effectively dims the lights on the unit and slows the fan down to reduce noise, but I found it to be on the weak side, so you might end up running the standard settings to get a satisfactory performance.  

❌ You’re conscious of noise: While the Blueair Blue Pure 211+ Auto runs quietly at its lowest setting, it's among the noisiest at its fastest setting. It’s not particularly noisy on the whole, but this is something to be aware of.  

The bottom line

The Blueair Blue Pure 211+ Auto will suit most households. It’s a substantial air purifier, and offers first-rate air purification capabilities alongside a premium and simple-to-operate design. There’s enough settings to cover the basics, it's attractive, and can be customized to your liking.      

What you need to know: Throughout these tests, one cube-shaped air purifier stood out above the rest. The Blueair Blue Pure 211+ Auto dominated the competition. This medium-sized air purifier will suit rooms up to 550 sq ft. It features an upright cuboid design, with a plastic upper section and a skirt fitted around the base, which acts as a pre-filter and comes in several colors. A HEPASilent filter is included, which uses both a carbon and particle layer. For me, it looked like a futuristic robot, which has a quality appearance compared to the competition. There are three fan speeds on offer as well as an auto function, plus a night mode is included for dimming the lights.  

Design: This model provides enough settings to cover basic necessities. The three fan speeds offer a decent range, and the auto function means it’s able to self-adjust the speed to suit the quality of the air. As a consequence, this air purifier will only use as much energy as required. The night mode is a useful function, but I did find the power more lackluster than I would have expected on this setting.  

Performance

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Smoke CADRDust CADRPollen CADR
353347380

This air purifier scored best for its CADR; achieving 353, 347, and 380 respectively for smoke, dust and pollen. That means it will make quick work of all sizes of airborne particles. It also means it can handle a decent room size of 550 sq ft — making it more than adequate for a large bedroom or living room. 

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Noise (low)Noise (high)Power use
35.6dB60.8dB0.159 kWh

It scored average marks for noise produced, as it was fairly quiet on its lowest setting (35.6db), but on the noisier end of the spectrum at its loudest (60.8db). It was reasonable in terms of electricity consumption as well, using only 0.159 kWh over the course of 24 hours on auto mode. By comparison, the Levoit Core 300 required 0.7 kWh over the same period.  

Ease of use: This air purifier is very easy to use with one button to cycle through every setting — although the air quality indicator light is less than obvious with a blue light meaning good, and red meaning bad, and orange somewhere in between. Changing the filters couldn’t be more simple either, just remove the top of the device via the buttons on each side. Changing the filter is one of the 7 ways to get more out of your air purifier.

Value for money:  At around $300, this air purifier isn’t the cheapest, but it’s also not the most expensive. The Coway Airmega AP-1512HH by comparison is $200, while the Blueair HealthProtect 7470i will set you back over $450. Replacement filters are $70 though, which is pricey.  

Read the full Blueair Blue Pure 211+ Auto review

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Rating scorecard
AttributesNotesRating
PriceAt $300, this air purifier is average★★★☆☆
DesignOffers the basics, but lacks extra features★★★★☆
PerformanceTop of the class★★★★★
Ease of useStraightforward and user friendly★★★★★

Best value

Clorox Large Room True HEPA Air Purifier sitting on living room floor

(Image credit: Tom's Guide)
Best value

Specifications

Dimensions: 19 x 10 x 10 inches
Weight: 11.6 pounds
Suggested room size: 320 square feet
Filters: Pre-filter, HEPA, and carbon
CADR (smoke/dust/pollen): 206/219/232 CFM
Speeds: Three speeds and an auto mode
Noise level (dB): 41/58.7
Energy use (24 hours): 0.036 kWh
Warranty: One year

Reasons to buy

+
Small
+
Color-coded display
+
Three-stage HEPA filtering
+
Efficient operation
+
Runs on automatic

Reasons to avoid

-
No Wi-Fi or remote control
-
Low air flow compared to the competition
-
Three year warranty
Buy it if

✅ You want a compact design: This air purifier features a compact design which is ideal for smaller spaces. Measuring 19 x 10 x 10 inches and weighing 11.6 pounds, it’s portable and easy to store as well.  
✅ You want value for money: Priced at $149, this air purifier offers excellent value for money. And, it's very energy-efficient. However, replacement filters are a somewhat pricey $49.

Don't buy it if:

❌ You need something to suit a large room: Despite its name, this air purifier works best in rooms up to 320 sq. ft., so it’s likely unsuitable for larger bedrooms or living rooms.

❌ You want to control it remotely: To cut some corners, this model does not come with a remote control or smart home connectivity, but Clorox offers higher-priced models with these features.

The bottom line

The Clorox Large Room True HEPA Air Purifier is the answer if you need an air purifier at an affordable price. While its CADR readings aren’t as high as others on the list, it’s still more than capable of adequately cleaning up to 320 sq. ft. Plus it offers all of the settings you need, including an auto function.

What you need to know
The Clorox Large Room True HEPA Air Purifier offers a small and effective design, measuring 19 x 10 x 10 inches while suiting rooms up to 320 sq ft. It has a neat and pleasing appearance — looking somewhat like a large battery with a fitted pre-filter skirt and a single button on top.  

Design: We liked the Clorox's simple, plain design. On the top is a touchscreen that lets you control all of its functions, and clear indicators for fan settings, automatic operation as well as the current particulate level. A vertical LED bar shows the level of 2.5-micron particulates per cubic meter with six different color-coded levels; green is safe, while maroon means you should probably leave the room. It also has a timer for automatically turning it off, and if the unit is tipped over by a pet or small child, it automatically turns off. 

Performance

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Smoke CADRDust CADRPollen CADR
206219232

The Clorox's CADRs of 206, 219 and 232 across smoke, dust and pollen make it well-suited for medium- to largish-sized rooms up to 320 square feet. At its lowest setting, I also found this air purifier to be quiet (41 dB), but it rose to an annoying 58.7 dB at its highest setting. It is very energy-efficient, though, using just 3.6 watts of energy at its lowest setting.

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Noise (low)Noise (high)Power use (kWh)
41 dB58.7 dB0.036 kWh

Ease of use: With a touchscreen to control everything, ease of use couldn’t be more obvious. The only thing really missing is a remote control, which would have been handy. The filters are easy to switch out when needed though. 

Value for money: This air purifier costs just $149, which makes it pretty great value — although keep in mind filters cost $49, so replacing them could add up over time.  

Read the full Clorox Large Room True HEPA Air Purifier review

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Rating scorecard
AttributesNotesRating
PriceGood value up front and in energy costs★★★★☆
DesignPlenty of settings★★★★☆
PerformanceCapable in a smaller space★★★★☆
Ease of useStraightforward with easy-to-read controls★★★★☆

Most energy efficient

Most energy-efficient air purifier

Specifications

Dimensions: 16.8 x 18.3 x 9.6 inches
Weight: 12.3 pounds
Suggested room size: 361 square feet
Filters: Pre-filter, Carbon filter, True HEPA
CADR (smoke/dust/pollen): 247.5/232.3/241.3
Speeds: Three speeds, plus an auto and eco mode
Noise level (dB): 36.8/58.3
Energy use (24 hours): 0.082 kWh
Warranty: Three years

Reasons to buy

+
Small footprint
+
Eco mode available
+
Energy efficient
+
Three year warranty

Reasons to avoid

-
Loud
-
Heavy to move around
-
Expensive replacement filters
Buy it if

✅ You care about energy consumption: The Coway Airmega AP-1512HH had the best energy score of all those tested, at just 0.082 kWh over 24 hours. This equates to a cost of just over $3 a year depending on your provider.  

✅ You’re stricken for space: With a footprint of just 16.8 x 18.3 x 9.6 inches, this is a compact design which won't take up too much floor space. It has a thin and square build.  

✅ You want adequate settings: While it’s a compact design, it’s not lacking in settings. An auto mode is included, so it will self-adjust the fan speed depending on the conditions of the room, and it comes with an eco mode which lets it power off when not required. 

Don't buy it if:

❌ You want to move it around: While the design is indeed compact, it’s still plenty heavy enough at 12.3 pounds. The Blueaur Blue Pure 411 Auto weighs just 8.3 pounds by comparison.

❌ You want peace and quiet: This was a noisy air purifier compared to others I tested, measuring 36.8dB on its quietest fan speed and 58.3dB at its loudest. So this isn’t one to get if you intend to work in the background.

❌ You care about costs: While the air purifier itself doesn’t cost a huge amount, the replacement filters will set you back $40 at a time. That’s about 20% of the initial cost. 

The bottom line

There’s no denying how much the Coway Airmega AP-1512HH looks like an iPod Shuffle, but if you don’t mind that outdated Apple aesthetic, it’s a great air purifier. It offers an adequate CADR, comes with plenty of settings and uses minimal energy. Just keep in mind that it’s a little noisy and that replacement filters aren't cheap. 

What you need to know
The Coway Airmega AP-1512HH offers a smaller footprint than those listed so far, measuring 16.8 x 18.3 x 9.6 inches. Don’t mistake this for meaning it’s more portable though, as it still weighs 12.3 pounds — this isn’t easy to lug around despite the included handle. While compact, it will suit rooms of up to 384 sq ft. For me, it's appearance is more in keeping with a hotel or office versus a modern home, but it's performance is worth considering. 

Design: There are five different fan speed options to choose from, including useful auto and eco modes. While auto mode allows it to automatically adjust its fan speed depending on the current quality of air, eco mode will switch it to standby if it senses no change in the conditions of the air for a period of time. There’s also a specialized Ionizer option on top, which will disperse negative ions to improve the quality of the air it filters. In addition, there’s a timer for one, four and eight hours, and an indicator to change the carbon and HEPA filters. Lastly, an indicator light shows the current quality of the air. There’s no night mode, but you can dim the lights by holding down the Ionizer button.

Performance: 

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Smoke CADRDust CADRPollen CADR
247.5232.3241.3

It achieved a CADR of 247.5, 232.3, 241.3, with a similar performance across smoke, dust and pollen. While this is a little lower than those mentioned above, it’s worth accounting for the size difference, which is why this air purifier features so high on the list. 

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Noise (low)Noise (high)Power use (kWh)
36.8 dB58.3 dB0.082 kWh

It was also top of the class for energy consumption, requiring just 0.082 kWh over 24 hours. Taking account of the eco setting as well, air purifiers won’t get much greener. Where it falls down however is noise — it produced 36.8dB on the lowest setting and 58.3dB on its highest, which is pretty surprising considering the size. Having said that, a colleague bought this air purifier for her allergies — and it’s changed her life

Ease of use: It’s very straightforward to set up and operate, with the buttons on the control panel clearly labeled and responsive. This air purifier makes cheery beeps and chimes as you operate it too, which I found comforting. It’s compact enough to hide it out of sight when required. 

Value for money: The air purifier itself will set you back $170 up front, which isn’t bad. Running it will be equally cheap with a very low energy consumption. However, the replacement filters do cost $40 a pop, and will need changing every six months to a year. So this is worth bearing in mind. 

Read the full review: Coway Airmega AP-1512HH

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Rating scorecard
AttributesNotesRating
PriceGood price up front, but expensive filters★★★★☆
DesignPlenty of settings, but heavy★★★☆☆
PerformanceGood considering the compact design★★★★☆
Battery lifeVery straightforward★★★★★

Best for large rooms

Best for a large room

Specifications

Dimensions: 22.3 x 20.0 x 10.8 inches
Weight: 17 pounds
Suggested room size: 465 square feet
Filters: HEPA filter and activated carbon pre-filter
CADR (smoke/dust/pollen): 300/320/300
Speeds: Four speeds
Noise level (dB): 41/59.6
Energy use (24 hours): 1.002 kWh
Warranty: One year

Reasons to buy

+
Strong performance
+
Cheap replacement filters
+
Easy to use

Reasons to avoid

-
Noisy
-
High energy consumption
-
No auto mode
Buy it if

✅ You need to cover a large space: This air purifier will suit rooms of up to 465 sq ft, which is pretty sizable. And thanks to its CADR scores of 300, 320 and 300 for dust, smoke and pollen respectively, it will filter your air both quickly and effectively.   

 You want good value for money: Considering its price of $150 and the capacity of 465 sq ft, this air purifier is excellent value for money. Plus the replacement filters only cost around $40, which is good value as well.

 You want something easy to use: The touch-based control panel on top of this air purifier is very easy and intuitive to operate. Plus there’s a quick reference guide included to help get you started.  

Don't buy it if:

❌ You want an auto mode: This air purifier lacks an auto mode, which means it will stick to whatever fan speed you set it to, rather than adjusting based on the quality of the air. That means you could be using more or less power than is actually necessary.  

❌ You want to save on energy: The Honeywell HPA300 consumed a lot of energy during my tests — using 1.002 kWh over 24 hours on the standard setting. This was the highest energy reading I'd seen in these tests, and translates to over $40 a year.  

You like peace and quiet: This air purifier is quite a noisy operator, producing some of the loudest decibel readings in my tests on both the lowest and highest settings (41 and 59.6dB). 

The bottom line

The Honeywell HPA300 might not be the prettiest to look at, but it’s straightforward to operate and will get the job done. Just keep in mind there’s no auto mode, and it’s not ideal in terms of noise or energy consumption.  

What you need to know
The Honeywell HPA300 is a bulky beast of a device that offers strong performance considering its reasonable price. It’s a large oval air purifier with slats all around, measuring 22.3 x 20.0 x 10.8 inches. It’s pretty heavy at 17 pounds, and I found the exposed lip on the base was sharp enough to scratch your legs as you move it. So this is the kind of air purifier you won’t want to move around once you set it down. It suits rooms up to 465 square feet, making it ideal for larger spaces.

Design: Its settings are admittedly limited, offering four different fan speeds (including a turbo mode), as well as a timer for two, four or eight hours. There’s also the option to dim the device for night time operation. Indicators are included to check the three HEPA filters and activated carbon pre-filter within. However, there's no auto mode, which is a shame, so you'll have to manually change the fan speeds. 

Performance: 

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Smoke CADRDust CADRPollen CADR
300320300

A truly powerful device, the HPA300 scored second to the Blueair Blue Pure 211+ auto on the CADR test. With an average CADR score of 300, 320 and 300, it performed slightly better on dust versus pollen and smoke and would suit rooms of up to 465 sq ft. 

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Noise (low)Noise (high)Power use (kWh)
41 dB59.6 dB1.002 kWh

However, that performance comes at a price, because it consumed more energy than any other air purifier I tested, at 1.002 kWh over 24 hours, and it was on the noisier end of the spectrum, producing 59.6 dB on its loudest setting. The Blueair HealthProtect 7470i produced just 48dB on its highest fan speed by comparison.  

Ease of use:  Air purifiers don’t get much easier to use, with a touch-based control panel and a quick reference guide to remind you of the basics. However, setting up this air purifier at first and replacing the HEPA filters when required is admittedly fiddly. I found fitting the front cover back into place to be awkward.  

Value for money: Ultimately, at $150, this air purifier is a good value for the money up front, and the replacement filters are also a good price at $40. However, it’s worth keeping the cost of energy in mind to run this machine to get that amazing performance. You could end up paying back for it over time with regular use. 

Read the full review: Honeywell HPA300

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Rating scorecard
AttributesNotesRating
PriceGreat price overall, but energy use is high★★★★☆
DesignSimple and adequate, but no auto mode★★★☆☆
PerformanceStrong CADR, but poor energy and noise ratings★★★★☆
Ease of useUser friendly and intuitive★★★★☆

Best for small rooms

Best for small rooms