The Best Air Purifiers (2021 Reviews)

Are you one of the seven hundred million people in the world who suffers from hay fever? Do you have trouble breathing or sleeping because of the quality of air in your home? Does even a small amount of dust causes your asthma to flare up? If you’ve answered “Yes” to any of these questions, you might benefit from having an air purifier in your home. Air purifiers are products that you can buy to improve your home.

They work by filtering out the microscopic particles which irritate your lungs, but there are so many different types, so how do you know which is right for you? Well, we’ve found six of the best air purifiers on the market to simplify your decision and save you time.

The 6 Best Air Purifiers To Get In 2022

In the table below, you’ll find the name of each product we’ll be highlighting, as well as a couple of its most important specifications. This gives you a simple, at a glance overview, but we’ll go into more detail below.

Air PurifierControl TypeRoom Size 
Holmes Air PurifierManual109 sq ft
Hamilton Beach TrueAirManual160 sq ft
GermGuardian AC4825Manual155 sq ft
Winix 5300-2 (Editor's Pick)Manual360 sq ft
Dyson Pure Cool LinkManual, Remote via app300 sq ft
Alen BreatheSmartManual, Remote via controller1100 sq ft

Now that you’ve gotten a feel for the products we’ll be discussing, let’s inspect each of them more closely. We’ll be looking for any areas in which each purifier excels, where it could use some work, and who the product is best suited to. That said, let’s begin with the least expensive product, the Holmes HEPA Type Desktop Air Purifier.

Holmes Air Purifier – Best Budget Air Purifier

The Holmes HEPA Type Desktop air purifier is a compact, inexpensive little product that can really freshen up your home. It’s enough to clean up the air in a room up to 109 square feet in size, and can be positioned either vertically or horizontally, depending on the space you have available.

Aesthetically, it’s nothing special – the casing has a two-tone white and light grey design with two switches on the top. These control the purifier’s speed and turn it on or off. There are three-speed settings to choose from, with the lowest providing decent “everyday” purification with very little noise, and the highest being a little louder but filtering the air more aggressively.

This is a very lightweight product, weighing just 5.7 pounds, plus it’s small too, at 14.8” wide, 11.4” deep and 7.2” tall. This makes it very easy to move from room to room as needed, and easy to store if you find that it isn’t needed during specific times of the year.

There’s no remote control for this model, but given its low price point, that’s not unusual. It’s the kind of product that you’ll leave on all the time anyway, so just use the power switch and leave it be. The clean air delivery rate (CADR) of this product is 70.

This means that it can clean 70 cubic feet or a little under 17 sq ft. For best results, try to avoid putting it in a huge open space.

This model uses a high-efficiency particulate air (or HEPA) filter to catch as many harmful particles as possible – up to 99% of them actually, and as small as 2 microns.

For context, that’s one ten-thousandth of a centimetre, so you know that this is pretty good at what it does.

Many low-end air purifiers create an off-putting smell, but not this one. It uses a Carbon filtration system to reduce any less than fresh aromas by up to 44% compared to its competition.

We didn’t notice any issues of this kind during testing, although they may have developed over an extended period of time.

One filter is provided to get you started. This should last between 4-6 months before being replaced, and at this point, you can choose from a wide range of filters tailored to different needs.

There are replacements focused on removing allergens, fighting smells, and so on. You’ll know when the filter needs to be changed when the LED on the front of the unit lights up.

There is also an optional ionizer – this emits negatively-charged ions that attach themselves to harmful particles in your room.

This isn’t particularly useful though since it doesn’t actually remove these from your environment, it simply collects them in an internal tray for easier disposal.

Overall, given the low cost of this air purifier, it’s actually pretty powerful. It is small enough to fit just about anywhere, can be oriented however you like and has a decent CADR rating.

The filters last for a relatively long time and catch a wide range of potentially harmful particles. For under 40 USD, that sounds like a pretty good deal to us.

What We Liked

  • Small and lightweight
  • No unpleasant smell
  • Decent filter life
  • Can be vertical or horizontal

What We Didn’t Like

  • No remote control
  • Not very attractive

Hamilton Beach TrueAir – Most Cost Effective Air Purifier

The Hamilton Beach TrueAir air purifier is a step up from the last model in terms of price, but not by too much. It costs around 45 USD, and for that small increase, you get a very versatile little product that can actually save you a fair amount of money in the long term.

Sounds good, right? Well, don’t just take our word for it, let’s do that math.

Unlike most other air purifiers that require regular filter replacements, this one uses a permanent built-in filter that can be vacuum cleaned periodically. Now, given that disposable filters need to be changed every 6 months, and cost around 10 USD each (for the least fancy ones), that’s 20 USD a year that you’ll be saving – almost half the cost of the unit itself.

After 2 years, this product pays for itself. You will have to take a vacuum to it every 3-6 months, but that only takes a couple of seconds and probably less than a cent’s worth of electricity.

Like the last model, this one uses a HEPA filter, but it catches particles 3 microns or larger, instead of 2.

It can clear an area of up to 160 square feet (about the size of a tiny apartment or very large room) and even better, it’s almost silent. You can choose one of the three-speed settings, and obviously, the higher settings increase the volume a little, but it’s still not going to keep you up at night.

Again, there’s no remote control, but given the limited controls (a twist dial on top), that’s not really needed.

This model is particularly good at removing dander from pet hair, so if you have a cat or long-haired dog and it’s giving your lungs or sinuses a hard time, now might be a good time to invest in this model.

That said, it’s also pretty good at removing pollen, dust and everything else you’d expect, so it’s hardly a one-trick pony.

This air purifier measures 8.5” wide, 6” deep and 13.5” tall, and weighs a little under 6 pounds, so it’s highly portable and to increase its versatility even further, it can be placed either upright or on its side, making it ideal for small spaces.

If you decide to lay it horizontally, it comes with four adhesive feet to keep it raised and prevent any noise caused by vibration.

When you pay a lot of money for something, it makes sense that you’d want to know it’s going to last.

That’s why the manufacturer has included a free one year warranty with this model. If anything breaks or stops working within the first twelve months, you’re covered and won’t be left out of pocket.

They also provide a US-based toll-free call center which can help you resolve any technical problems that you might be facing.

All things considered, we think that this model might be the one that saves you the largest amount of money. It’s still relatively inexpensive, but the built-in filter is the real stroke of genius. It has a pretty good coverage area and as a bonus, a full year’s warranty – a winning combination that any air purifier would be envious of.

What We Liked

  • No need for disposable filters
  • One year warranty
  • Excels at catching dander
  • Can be vertical or horizontal

What We Didn’t Like

  • Catches slightly larger particles

GermGuardian AC4825 – Best Mid-Range Air Purifier

When you want the air in your environment super clear and don’t want to spend too much money, you turn to the GermGuardian AC4825. It’s a relatively large air purifier, and it has to be in order to fit all of the high-tech components in.

This purifier uses a three-stage process to clean the air. The first stage involves using a pre-filter and a charcoal filter to catch large particles like dust or lint, and mute unwanted smells. Phase two uses a HEPA filter to trap up to 99.

97% of finer airborne particles before finally, the ultraviolet light destroys any bacteria or viruses. This light also activates the titanium dioxide contained in the unit, allowing it to degrade any odor molecules and lessen any smell resulting from smoking or pets.

What’s especially encouraging is that the filter in this model catches far smaller particles, 0.

3 microns or larger. This makes it ten times as effective as the Hamilton Beach TrueAir Air Purifier, although it is considerably more expensive, at around 90 USD.

It does have a slightly lower recommended room size (155 square feet vs 160), but given its CADR rating is over 100, it’s much more effective at clearing the air in that room.

This model uses disposable GermGuardian filters, but each has a lifespan of between six and eight months, plus there’s a little light on the top of the unit which illuminates when the filter is in need of a replacement. There is a similar LED that lights up when the UV-C bulb is dying, too.

Now, you might be thinking that this model has high running costs, but thankfully, it doesn’t – the filters are around 20 USD a year, and the bulb will last much longer than that, and costs around 10 USD.

The AC4825 is Energy Star certified and has very low power requirements, and it’s ultra-quiet.

This means that you can leave it on at night without a loud hum keeping you awake. If you find it too loud, you can just choose a slower setting (there are three speeds available) and go back to bed.

We’ve touched upon the size of this product before, but let’s talk specifics.

It is 21.5” tall, 10.2” deep and 7” wide. This means that you’ll likely need some dedicated floor space for it – it doesn’t have to be central, so really, if you have a free corner, it’d be right at home there.

Now, GermGuardian is so confident in their product that they provide a free 3-year limited warranty with purchase.

This covers anything that’s dead on arrival or breaks through no fault of your own – given that the product costs almost 100 USD, that’s a great safety net for you if anything goes wrong.

We really like this product. Its three-stage system catches almost all harmful bacteria or particles in the air and it’s pretty cheap to run since it’s so energy efficient.

On top of that, it does a good job of removing smells, which makes it an excellent choice for anyone who owns a pet; just think – no more wet dog smell! If you have the money to spare and don’t mind paying a little more for quality, this is the one for you.

What We Liked

  • Three stage filtration system
  • Three year’s limited warranty
  • Excels at removing smells
  • Reasonably low running costs

What We Didn’t Like

  • Both filters and UV bulb need to be replaced
  • Slightly more expensive

Winix 5300-2 – Quietest Air Purifier

The Winix 5200-2 air purifier is a little monolithic, but if you can look past its exterior, you’ll find a hardworking, resilient and powerful product that justifies it is slightly higher than average price point.

The first way it does this is by providing more control options than your average air purifier, with the on/off, mode select, fan speed, PlasmaWave, and timer buttons all mounted front and center at the top of the device.

Like the model we have just seen, this one catches 99.97% of all particles which are 0.3 microns or larger. This is to be expected of a purifier at this price range (it’s around 130 USD ), and at this price point, anything which can’t trap dust at less than a single micron in size is vastly overpriced.

This model has a three-stage setup, not unlike the GermGuardian AC4825. Firstly, it uses a carbon filter to screen the largest particles in the air, before using its HEPA filter to catch the finer ones. Finally, if you’ve turned on the PlasmaWave function, it uses its built-in ionizer to destroy any harmful bacteria and pollutants in the air.

Some ionizers create ozone during operation – this can be harmful to your lungs and exacerbate conditions like asthma, but this product is completely ozone free, no matter how long you run it.

There are a couple of useful pieces of tech in this model, the first is a light sensor which adjusts the brightness of the LED display so that it matches the brightness of the room – coupled with the 5300-2’s very low operating noise, this makes it the perfect purifier to have on at night.

Secondly, there is an air quality sensor. This rates the quality of your air between one and three and adjusts its running speed to compensate for this. You can, of course, set the speed yourself – there are four different options available and even a mode specifically for when you want to go to sleep which runs silently.

This product is powerful enough to clean the air in a room that is 360 square feet and has a dust CADR rating of 243, so it’s ideal for a large room or even a small apartment.

It uses replaceable filters, although the running costs are low thanks to their long life, with Winix estimating that each is good for up to a year before it needs to be replaced.

Better still, you’ll know when the time has come thanks to the handy LED that illuminates when the filter is due for a replacement.

This model is quite large at 23.6” tall, 14.9” wide and 7.8” deep, so it’s more of a “find a place and leave it there” type of product.

It weighs 18 pounds, so whilst it’s not too heavy, it’s certainly not something you’d want to be moving around frequently. To be honest, you don’t really need to since it can cover such a large area.

What We Liked

  • Three stage filtration system
  • Powerful enough for 360 square feet
  • Lots of customisation
  • Silent at lowest speed

What We Didn’t Like

  • Quite large
  • Slightly more expensive

Dyson Pure Cool Link – Most Attractive Air Purifier

Is this not just the most futuristic piece of hardware you’ve ever seen? The design of this model is entirely unique and really gives this air purifier a sort of sci-fi aesthetic.

It’s fairly expensive, at a little under 380 USD, but with the wide range of high-tech components and range of versatility, the Pure Cool Link is well worth it.

Like some of the previous models, this one is very efficient – it collects up to 99.97% of all harmful particles in the air, as long as they are 0.3 microns or larger, plus it uses its long-range projection technology to circulate clean, fresh air all the way across the room.

This model uses a 360° glass HEPA filter to capture ultrafine particles and a second carbon filter to reduce the impact of any unwanted smells in the air. Further, you can actually set this purifier to automatic mode and have it monitor the environment and adjust itself accordingly.

You can see the results of the product’s analysis in real-time (including humidity, temperature, and air quality) using the Dyson mobile app, which also doubles up as a remote control. You’ll need to set this app up to qualify for the free two-year warranty – this could save you a lot of money and heartache, so we’d recommend doing it as soon as possible.

It’s also worth noting that even if you don’t have a smartphone or tablet, you can still use the physical remote control that comes with it.

You can set the Dyson to night mode, which monitors, reacts and purifies, but only at the lowest speed so that there is the absolute lowest amount of noise possible.

Similarly, the brightness of the LED display is reduced to help you sleep, which is a nice touch.

Due to the unique design of this air purifier, it’s super easy to clean. There’s no need to remove any external grilles or fans – just run a cloth over it, like you were dusting any of your other furniture and it’ll be fine.

Obviously, the dust trap at the bottom will need to be emptied periodically, but it just slides out and isn’t a problem.

This is a very large product – standing a touch over 40” tall and at 7.7” wide, 4.3” deep. It’s definitely going to need a dedicated floor space, but given that it can clean the air in a room up to 300 square feet, you should be good wherever you decide to place it (within reason, of course).

It’s relatively light, though, at 7.9 pounds, so if you do need to move it, it won’t be a struggle.

There are lots of benefits to getting this model, and as far as we can tell, the only downside is the high price.

It not only looks fantastic, but it offers a degree of flexibility that is unmatched by any of its competition – from the two remote control options to the simplicity of cleaning it. There’s no doubt, the Dyson is a high-quality air purifier with a high-quality price tag.

Are you a fan of Dyson products? Then check out our guide for the best Dyson vacuum.

What We Liked

  • Goergeous appearance
  • Two remote control options
  • Night mode
  • Automatically adapts to environment

What We Didn’t Like

  • Light but pretty large
  • Relatively expensive

Alen BreatheSmart – Best High-End Air Purifier

If you’re looking for an air purifier that matches all of your other home furnishings, then Alen BreatheSmart is the one for you.

It comes with a choice of 16 different colors, from the standard white to a vibrant and shocking shade of blue, so you can be certain that there’ll be one available which will be perfect for you.

It’s another pretty large air purifier, at just over two feet tall, 17.8” wide and 10” deep and as such, it’s going to require a dedicated spot on your floor. Once you’ve found the perfect spot for it, it’s unlikely you’ll want to move it again, since it weighs 26 pounds.

Thankfully, though, it is powerful enough to clean the air in an absolutely massive area – 1100 square feet – that’s almost ten times the area of the lowest priced model we’ve reviewed here.

Accordingly, this model is the most expensive. It has a retail price in the mid 600 USD range, and understandably, a lot of people might be put off by this, however, there’s one very good reason to purchase this model.

Purifiers come and purifiers go, but this one is forever – Alen includes a lifetime warranty on this product. Whereas most of its competitors offer a few years at most, they’ll replace it if it breaks in twenty years’ time.

This model has a feature that automatically detects the quality of the air and adjusts its speed accordingly to prolong the filter life and conserve energy.

It’s worth noting that it uses very little energy even on the highest speed (105 watts) as it is Energy Star certified.

It also uses WhisperMax technology to eliminate any annoying high-frequency sounds, so if you were hoping for the kind of background humming noise, you’ll be disappointed here.

You have the choice of four different replacement filter types, each tailored to meet a particular need, with each having a lifespan of six months or so.

If you’d like to turn the unit off or change the settings from a distance, there’s a physical remote control included, always a plus and it has all of the same functionality as the buttons on the purifier body, and so no matter what you want to do, you don’t have to get up.

There’s a helpful air quality indicator, as well as a filter life LED on the body of the unit, and as well as having a two filter setup, it has an ionizer which can be turned on or off independently, depending on whether you have a need for it.

When you take into account the price of this product, it’s easy to dismiss it right off the bat, but look more closely and you’ll find that this product not only justifies its high price tag but is actually a bargain at twice the price.

To cover all of the areas that this model does, you’d need several purifiers, and they’d almost certainly be more expensive than this one, plus you’d have to change the settings on all of them manually, whereas the Alen Breathesmart lets you do it all in one place and looks great to boot.

If you want the best of the best, be smart, get the Breathesmart.

What We Liked

  • Choice of 16 colours
  • Massive purification area
  • Energy efficient and near silent
  • Automatically adapts to environment

What We Didn’t Like

  • Large and heavy
  • Expensive

How To Pick The Right Air Purifier

Air purifiers can be a little intimidating at the best of times. These machines stand in our homes and clean the air, but how? Well, the good news is that you don’t need an in-depth understanding of the science behind it (but if you want to know, check out the article here), but there are a couple of relevant features that you should look out for before committing to a new model.


How exactly do you plan to use this air purifier? Is there a lingering smell in your home that you’d like to reduce or remove or are you more concerned with alieving the symptoms of your allergies?

If getting rid of an unwanted scent is high on your list, you’ll want a model that uses a carbon filter – these are often the first stage in a multi-step process, so you don’t have to settle just for a one filter system.

If you have a pet, make sure to buy an air purifier for pet allergies, that is,  a model that deals with pet dander. This is the catch-all term for any hair which is shed from a pet (or human).

This will help reduce the feeling of needing to sneeze, as well as stopping other common negative symptoms like teary eyes or a runny nose.

For best results, you’ll want a filter that catches very fine particles of dust, somewhere in the 0.4-micron range – this means that anything four ten-thousandths of a centimeter in size can’t escape. Less expensive models tend to catch much less and might not provide the results you are looking for.


There are two kinds of air purifier owners: the first is happy to leave it powered on twenty-four hours a day, content to believe that it’ll do whatever it needs to on its own. The second type likes to check in a few times a day. Or every hour. Or every ten minutes.

Many high-end purifiers offer real-time feedback on the quality of the air in your environment, but unless something is really wrong, they’re more than capable of adjusting their speeds without any input to match their surroundings.

Try to resist the urge to micromanage – these products are supposed to make your life easier, not be something else to worry about.

If you’d like to leave it on at night, make sure you buy one which is quiet. We’re not talking “daytime” quiet since that can often seem very loud in the middle of the night, but near silent.

On the lowest speed, many models have very low noise levels and some even have a dimmable screen so that the bright display isn’t a distraction when the lights go down.

You might want a model that has a remote control for easier use, and these generally come in two forms; the first is a traditional remote control, same as the one for your TV, whereas the second uses a mobile app to communicate. Each method has its pros and cons, and ultimately which is best is down to your own personal preference.


So many high-quality products, so little time. Whilst each air purifier that we’ve reviewed today is great in its own right, there’s one, in particular, that stands above the competition and that’s the Winix 5300-2 Air Purifier. It has a large purification area and is near silent whilst having low running costs and a reasonable price point.

So there you have it – the best air purifier around. With a bit of luck, you’ve found a model you like and maybe even learned something about air purifiers along the way. If you have, feel free to take a look at some of our other product reviews since there’s quite an extensive selection and you might find something to treat yourself with.

Thanks for taking the time to read this, and have a great day.

If you want to know more about air purifiers check out this website.

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Justin Howe

Electrician and DIY specialist Justin deleted his own successful tech blog to write expert product reviews and buying guides together with his friend Robert.

Justin Howe

Electrician and DIY specialist Justin deleted his own successful tech blog to write expert product reviews and buying guides together with his friend Robert.