The best air quality purifiers and monitors for your smart home

Buyers' guide: We review the top indoor air devices

The best air quality purifiers

With air quality becoming a serious issue, the latest smart air purifiers and monitors enable us to get our own homes in order.

Poor indoor air quality is a problem of varying degrees depending on where you live. It can be up to five times more polluted than outdoor air and, with four million deaths per year worldwide from household pollution, in many cases as a result of poorly ventilated homes, it's a serious matter for millions of people.

Just because the air you're breathing isn't an immediate danger, though, doesn't mean its quality isn't worth thinking about. It can affect everything from allergies, to sleep, to concentration, not to mention how much of an impact air quality can have if you, your family or housemates suffer from asthma.

Smart air quality monitors: What to consider when buying

As part of the wellbeing push from Silicon Valley, tech companies think they can help you to track and improve the air where you live. Air quality monitoring is both a standalone and an add-on feature.

Even when it's the main event, it's often bundled in with other sensors that give you information about your home in real time – like motion, temperature and humidity. You might find that you start tracking out of curiosity and this may lead you to get into the purification game once you see the results. Because what's the point of tracking something if you're not going to do something about it?

Most of us have no idea what's in the air we breathe so you might want to track as many things as possible. But there might also be a particular chemical or particle that you're interested in. Some of the major ones to consider are dust, pollen, VOCs (volatile organic compounds), CO2 (carbon dioxide) and NO2 (nitrogen dioxide) from outside traffic.

Ok, but what do they all mean?

CO2: Carbon monoxide is one of the more toxic culprits of bad air quality. Appliances like gas fires and cookers can give this off, and too much breathed can lead to nausea, headaches - and can be deadly if too much is breathed.

VOCs: Volatile organic compounds are nasty gases emitted from things like paints, varnishes and disinfectants. Left untreated, it can cause irritations and lead to damage of the kidney, liver or central nervous system.

Radon: Radon is a radioactive atomic gas that's caused by the decay of radium. Sounds unlikely, but this is a common hazard that can enter homes through building materials or even well water. Outside it disperses before it's dangerous, but in a tighter space - like a home - it can be dangerous.

When it comes to air purifiers, these are typically a standalone product that's bigger and more expensive, though Dyson's Pure Cool series are both fans and smart air purifiers. Purifiers work by sucking in the air then trapping air particles in a HEPA (High Efficiency Particulate Air) filter. That's another area to consider – do you want alerts and stats and graphs in an app that lets you know how your house is doing minute by minute, or are you happier to let a purifier do its work, left alone? Some models, like Dyson's, also offer handy extras like Alexa voice controls, but this probably won't be your main criteria.

We've checked out a few of the leading devices in air quality monitoring and purifying and rounded up the best products to consider.

All-in-one air quality monitors and purifiers

These devices not only monitor the levels of particle baddies in the air, but they do something about it too…

Air quality monitor and purifier buying guide: Everything you need to know

Dyson Pure Cool

$449 (desktop), $549 (tower), Amazon |

Dyson has a range of devices on sale now that will monitor and purify indoor air – and some will even throw heating and cooling (or both) into the mix as well. However, it's the flagship purifying device from the British company that we're focused on here.

Dyson's new Pure Cool fans/air purifiers come in desktop and tower sizes – we've had the latter on test and it's more suited to sitting on the floor as it's as over a metre tall. Dyson claims it can get rid of pollution from all manner of sources including pets, pollen, cleaning products, NO2 from traffic outside the house and VOCs from paint and candles, catching 99.5% of air particles down to as small as 0.1 microns. The Glass HEPA filter is 60% larger than its predecessor and there's a separate carbon filter too.

There's a round LCD screen which can give you a real time air quality reading, plus temperature and humidity sensors. If you want to dig a little deeper then you can tap into the Dyson Link app (the same one used for your 360 Eye robot vacuum cleaner) for all the stats and you can even get Amazon's digital assistant to give you an update by saying, "Alexa, ask Dyson for indoor air quality".

The Pure Cool, as you probably guessed from the name, also operates as a fan. It turns 350 degrees and is capable of pumping 290 litres of air a second, and can be set to diffuse air rather than projecting – so it can be purifying your air in the winter without cooling down a room you're trying to heat up.

It's simple to use – in fact you could just push the auto button and forget all about it. There's also a night mode where the fan operates at a lower, more quiet, level, and the LED display also dims.

the ambient verdict
Dyson Pure Cool
Dyson's latest device packs in a wealth of cutting edge tech and bold claims about the micro levels of filtration and purifying on offer. But, because it's Dyson, you don't need to worry about this – you can trust it's a well made, easy to use piece of high-end tech that does exactly what it claims to do.
  • Advanced purifying
  • Works within Dyson Link system
  • Real time readings
  • Expensive, of course
  • Tower design is massive
  • Replacement filters will be pricey

The best air quality purifiers and monitors for your smart home

Xiaomi Mi Air Purifier Pro


Xiaomi's smart home platform is humongous and, while people might be quick to write the Chinese behemoth off as an Apple rip-off specialist (which it undoubtably is too), the company produces well-built devices that are increasingly easier to use thanks to its extra efforts at offering the Mi Home app in western languages.

The Pro Air Purifier is another example of this – it's a simple plug-in-and-go affair, backed up with some extra smarts on the Xiaomi Mi app.

Like Dyson's Pure Cool, there's a nice display (OLED, we're informed) for the current air quality reading, with Xiaomi showing a PM2.5 concentration scale for particulate matter, along with both temperature and humidity readings. There's also a LED ring around the OLED panel that changes colour from green to red based on the readings.

It's not quite as big as the Dyson, at around 75cm high, but it's still a bit of a beast, and there are no heating or cooling options on offer. It simply concentrates on purifying indoor air – something that's even more important in China. Xiaomi claims it can clean 500 cubic metres an hour, and it also boasts of a laser particle sensor that's capable of spotting particles as small as 0.3 microns in diameter.

It has a triple layer 360-degree filter, with a PET pre-filter, an EPA filter, and an activated carbon filter. You can toggle between an auto mode, a night mode and your own personal targets (set in the app) with a simple tap of the button and you can also team it up with Xiaomi smart home sensors to create automations based on factors such as the weather.

the ambient verdict
Xiaomi Mi Air Purifier Pro
Running almost silently, the Xiaomi purifier will work in spaces up to 60 square metres and, after you turn it on, you won't really have to worry about it – leave it alone and it will do its thing. The Mi Home app is getting better all the time (you'll still land on a Chinese-only menu every now and again, but that's part of the fun) and Xiaomi is fast becoming a major player in the smart home world, even outside of its homeland.
  • Cheap compared to rivals
  • Very quiet operator
  • Slick OLED display
  • Bulky beast
  • Minor Chinese language issues
  • No digital assistant integrations

The best air quality purifiers and monitors for your smart home

Coway Airmega 400S

$749, Amazon |

First thing to know about Coway's air purifiers is that there are several models to pick from, some of which are Wi-Fi connected and some which aren't. The 400S, seen above is one we've tested, but we've also taken one of the "non-smart" models for a spin and it's a decent air purifier nonetheless.

There are actually two connected models, the 400S and 300S (with Coway's naming system, the "S" always signifies that it's "Smart"). Both these models look identical, and come in either white or graphite options, but the 400S has a couple of added tricks up its sleeve, including Alexa integration. It also provides a bit more room coverage than the 300S. Both work with a mobile app that lets you control the purifier remotely, and both claim to remote 99.97 % of pollutants in the home. But the 400S is the more premium of Coway's offerings.

There are two filters that attach each side - the pre-filter and the Max2 filter - and while they did a great job of making our apartment air cleaner, they're another cost to consider, with the Max2 costing $129 for the 400 series and the pre-filter costing $25. Considering you'll need to replace them yearly, it adds up.

There's a real-time quality monitor displayed on the front of purifier and in the app. There's also a smart mode that will automatically adjust the fan speed depending on how many nasties in the air, as well as an in-app scheduler.

Personally, we're not huge fans of the design and think Coway's cheaper 200M (which we also tested) looks nicer. However, while it does a decent job of keeping the air clean, you dont get the Wi-Fi-connected features of the S models. Coway also sells the similar-priced and sized Mighty purifier, which again lacks internet connectivity.

the ambient verdict
Coway Airmega 400S
A powerful air purifier with useful smart integrations, the 400S is the top-end of the Coway's range, but the 300S is less expensive and still offers a handful of connected features. For larger spaces particularly, Coway's 300S and 400S models offer good coverage with their HEPA filters.
  • Good coverage for big spaces
  • Reasonably quiet
  • Good smart features
  • Not ugly, but not pretty
  • Expensive
  • Filter replacements not cheap

Best smart air quality monitors

These devices won't purify your air, but they will let you know about the air quality so you can do something about it, such as opening a window, or turning on a fan (there's an IFTTT recipe for that…).

The best air quality purifiers and monitors for your smart home

Netatmo Healthy Home Coach

$99.99 Amazon |

French smart home company Netatmo makes an affordable all-rounder that goes by the name of the Healthy Home Coach. It's a sleek looking cylinder that's compatible with Apple HomeKit (limited functionality) and tracks air quality (CO2), humidity, temperature and sound levels. If you tap the top you get an at a glance reading courtesy of the light down the middle. There's no advanced tracking on offer – you can forget about VOCs and the like.

Annoyingly, Netatmo, despite having a wealth of smart home tech, requires you to have a separate app for the Healthy Home Coach. However, it's a nice enough app with easy to see readings on temperature, humidity, ppm count and noise levels. You can also jump into graphs of what's been going on in the room it's placed in – although it only stores a day's worth of data, which is a bit naff.

What is good is that it operates in three modes: Whole Family, Baby and Asthmatic, with each one programmed with different thresholds for warnings. The Baby mode – the one I use – is more sensitive to heat; and the Asthmatic mode is more sensitive to humidity.

The design, like the Netatmo Welcome smart camera, is a shiny cylinder – pinkish for the model we've been testing – which is much nicer than the Elgato Eve Room but a lot more noticeable.

the ambient verdict
Netatmo Healthy Home Coach
More expensive that the Eve Room, and less feature packed, the Healthy Home coach is a pretty basic air quality monitor that looks the part but sadly falls short against its rivals.
  • Slick design
  • HomeKit integration
  • Nice app
  • Another app to download
  • No VOC monitoring
  • Not enough data stored

The best air quality purifiers and monitors for your smart home

Awair 2nd edition

$199, Amazon |

A tasty looking piece of smart home kit if ever we saw one, Awair is an air quality monitor with a stylish walnut casing that'll fit right in with your retro radios and classy furniture. It tracks VOC chemicals, CO2, dust, temperature and humidity levels and shows you your air quality score (out of 100) on the device's LCD display – based on an average of all of the readings.

The new second-gen model, which is all-but identical to the original, also throws in fine dust (PM2.5) detection as well.

If you've got a 'bad' score then it's easy to see what factor is causing it, as it's simply a case of counting the dots in the relevant column. If you become obsessed with this score (I didn't… honestly) you can also choose to just have the clock displayed, or the temperature or humidity level – but then you'd need to frequent the app more often for your air quality readings.

In the app you can also see personalised tips based on the readings, plus Awair connects to Nest (if you've got a Protect hooked up to an air conditioning unit), Amazon Alexa, Google Assistant and IFTTT so it should fit right in, no matter your smart home ecosystem. The app shows 24 hours of data at a time and you can easily scroll through to see previous days' stats.

Like Netatmo's effort there are also different modes you can select – Allergy, Sleep, Productivity and Baby – so you get different warnings from the app based on different variants.

the ambient verdict
Awair 2nd Edition
Stylish, in-depth tracker that will look the part alongside your picture frames and ornaments – the Awair has made air monitoring less dull and much more of a talking point, albeit at a higher price point than its rivals.
  • Great stylish design
  • Good level of monitoring
  • Smart home integrations
  • Expensive
  • App tips are a bit annoying
  • Nest syncing US-only

The best air quality purifiers and monitors for your smart home


$199, Amazon |

Okay, let's address the obvious elephant in the room here - that price-tag: for that outlay you'd expect an air quality device to be both monitoring and controlling your indoor air quality. Unfortunately, with the Foobot - not so... but there is a very detailed emphasis on the former.

With claims of being as accurate as a "$5,000 lab instrument" it is capable of measuring volatile organic compounds, particulate matter, carbon monoxide, carbon dioxide, as well as temperature and humidity.

It's not a looker - let's be honest - in comparison with Awair's model, although the display of the air quality is a lot more visual, and less subtle, with a beaming red light warning you of poor air quality.

It's a great app that it works alongside with - with easy to read diagrams regarding the current air situation, and it also boats a feature than none of its rivals do: it learns your behaviours over time so as it can better analyse why you're seeing spikes in poor air quality, with activities such as cooking and cleaning the most common culprits.

It's also much more advanced than its competition when it comes to smart home integrations. You can automatically get it to work with air conditioning units powered by Nest, Netatmo, Hive and Schneider and there's also a bunch of IFTTT applets ready for the Foobot too.

the ambient verdict
The Foobot is expensive - there's no getting around that - and it does look like an old-fashioned air freshener; but it has the science, the integrations, the app and the features to make it possibly the most comprehensive smart air quality monitor available right now.
  • Extremely comprehensive
  • Great smart home integrations
  • Clear poor air quality indicator light
  • Costly
  • Basic (ugly?) design
  • No Google Assistant yet

The best air quality purifiers and monitors for your smart home

Airthings Wave Plus

$269, Amazon |

With Airthings, the big focus is on radon detection - that's the Norwegian company's specialist subject. As explained in the intro, radon is a naturally occurring radioactive atomic gas, which can rise up through the ground and into your homes. It's linked to 4% of lung cancer cases in the UK and 21,000 people die from radon-related cancer every year in the US.

The Wave Plus is the first battery-operated smart IAQ monitor with radon detection - so you can get a warning and not become one of those statistics. If you get radon in your house the official advice is to open a window or two and then seek out a professional to help remediation work, such as getting a radon sump or introducing a positive pressure system..

In total there are six sensors on board, with sensors for carbon dioxide, humidity, temperature and total volatile organic compounds all in the mix as well. Everything is presented nicely in the app so you can get a quick snapshot of your air quality.

The Wave Plus has a way of making you panic though. If you tap the front of it you get a color LED indicating the air quality - green for good, amber for average, red for bed. Now, the one in my house is always red and it makes me panic and think I've got lung cancer, because of all that radon I've been breathing. However, it's only ever red because the humidity level is high where we keep it in the utility room - and there's no real need to be scared of humidity. There should be a setting whereby the red light only comes on if the radon is high.

Disclaimer - the radon has never been high in the couple of months I've been using the Wave Plus, but better safe than sorry, eh?

the ambient verdict
Airthings Wave Plus
The Wave Plus looks a little bit like a smoke alarm from the early 2000s but it’s functionality over features here and, despite the hefty price tag, it represents one of the easiest ways of keeping tabs of the radon levels in your home. It’s easy to install with a simple magnetic mounting bracket; takes just an hour to start accurately tracking radon levels and there’s now some IFTTT recipes available too for extra alerts from your connected devices.
  • Radon detection
  • Easy to install
  • Simple app to understand
  • Expensive
  • Design is a bit naff
  • Limited smart home integration

The best air quality purifiers and monitors for your smart home

Awair Glow

$99, Amazon |

Awair has a second offering, the Awair Glow, which comes without the flash and design of the above version, which pares everything down into a simple plug. Well, a rather chunky plug, but don't let its relatively diminutive size fool you - the Glow is a capable little air quality sensor.

The Glow can measure temperature, humidity, CO2, VOCs and motion, the latter useful for triggering other connected devices, such as an air purifier. The Glow is designed to be plugged into an outlet and stay there, which limits its flexibility a little, so make sure it's somewhere it can get a good read of the environment. I.e. not stuck behind a door.

When you first set up the Glow you'll be asked what your primary goal is. Is it to get a better night's sleep? To keep the allergies at bay? Your selection will determine what the Glow primarily looks out for.

The Glow has an outlet on the front too, and this is so you can plug in a purifier or other device that the Glow can switch on using set triggers. For example, I have my Airmega purifier plugged into it, and when the Glow detects the chemicals in the air are too high, it'll switch on the outlet, starting up the Airmega. Along the top of the plug is a white nightlight that can be manually switched on or set so it alights when the Glow detects motion (you can't set a time of day, but we found an IFTTT applet to solve that).

There's integration with Alexa and Google Assistant too, if you'd prefer to have those updates read out to you instead. You can just say, "Alexa, ask Awair about CO2 level" or ask for a general summary of the air quality. However unlike the Awair, the Glow doesn't have Nest integration.

the ambient verdict
Awair Glow
The Glow packs in plenty for its size and price, with a decent range of detection and real-time alerts. The app is a joy to use and the built-in outlet means you can automate it to switch on a purifier when those chemical levels get a bit toxic. A little more context would be useful on some notifications, but this does a decent job for $100.
  • Small and out the way
  • Can control a second device
  • Real-time alerts
  • A little ugly
  • More integrations would be good
  • Sometimes alerts lack context

TAGGED   smart home

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