Best air purifiers in 2024 tested and rated

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 as well as cleaning your air, an air purifier can help deodorize the space too, but how can you tell if you’re buying the right model? That’s where we can help you out. We’ve tested a range of air purifiers to find the best. 

To assess the performance, we used a certified testing method (AHAM AC-1) to calculate the CADR (Clean Air Delivery Rate) for each model. This shows us the rate these machines can filter the air in a measured space, with separate readings across dust, smoke and pollen, revealing the efficiency and the ideal room size for each. We checked the relevant certification to confirm these readings, and if it wasn’t provided, we sent the models off to the lab ourselves, to ensure a fair test. Following this, we considered all aspects of the design, including noise, energy, ease of use (including initial set up and any corresponding app) and filter accessibility. 

We compiled our results to create the following list, with recommendations for different circumstances. Whether you want a compact design to suit a kid’s room, or one which will handle a large space, these are the best air purifiers.    

The quick list

Already know what type of air purifier you’re looking for? Here’s a quick list of our winners for every category, so you can jump right into the reviews. This can save you some time if you already know that you need a compact design, or one which will offer smart capabilities. If you’re not sure what you want, scroll on to see our list in full.    

The full list: Best air purifiers

Best air purifier overall


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. By comparison, the Dyson Pure Cool TP01 reached an average of 71. 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: 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. 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 review: Blueair Blue Pure 211+ Auto

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

The best value for a large room

Best value for a large room


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

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: 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. 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
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★★★★☆

The best smart air purifier