The connected home allows us to pay more attention to our environment, and with air quality becoming a serious international 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. Tado's smart thermostats are getting the air monitoring feature later this year, for instance, and we've seen it before on smart home devices like smart security cameras.
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 β 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 β 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 tooβ¦
Dyson Pure Cool
Dyson has a range of devices on sale now that will monitor and purify indoor air β 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 β 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 β 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 β 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.
- Advanced purifying
- Works within Dyson Link system
- Real time readings
- Expensive, of course
- Tower design is massive
- Replacement filters will be pricey
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 β 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 β 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.
- Cheap compared to rivals
- Very quiet operator
- Slick OLED display
- Bulky beast
- Minor Chinese language issues
- No digital assistant integrations
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 thatβ¦).
Netatmo Healthy Home Coach
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 β 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 β 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 β the one I use β 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 β pinkish for the model we've been testing β which is much nicer than the Elgato Eve Room but a lot more noticeable.
- Slick design
- HomeKit integration
- Nice app
- Another app to download
- No VOC monitoring
- Not enough data stored
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 β based on an average of all of the readings.
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'tβ¦ honestly) you can also choose to just have the clock displayed, or the temperature or humidity level β 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 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 β Allergy, Sleep, Productivity and Baby β so you get different warnings from the app based on different variants.
- Great stylish design
- Good level of monitoring
- Smart home integrations
- App tips are a bit annoying
- Another proprietary power lead
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.
- 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
Elgato Eve Room
Let's face it: the Elgato Eve Room isn't going to win any prizes for design. However, the Eve Room isn't designed to be seen; it's supposed to sit out of sight getting on with the task in hand β that task of monitoring VOC levels (and humidity and temperature).
Like every other Elgato Eve device, the Room is 100% HomeKit. The Eve app is essentially the HomeKit one (and slightly easier to use), and as such, the Room can be set to trigger automations from other HomeKit devices based on its readings.
The app is pretty detailed in terms of historic graphs, although annoyingly there are no real time alerts β data is only synced between the device and your iPhone when you open up the app. That's not to say that you can't get a real-time warning, though it would have to be an automation like your Hue bulbs flashing red.
Be aware, as well, that a second-generation Eve Room is due to land any day soon β this time boasting an E-ink display.
- Good price
- VOC monitoring
- HomeKit enabled
- Blocky design
- App needs alerts
- No accurate CO2 levels