Support for your Dyson HEPA Cool Formaldehyde purifying fan

Here you can find helpful tips, video guides, maintenance advice, your user manual and more.

Dyson HEPA Cool Formaldehyde

Getting started

Watch how to quickly get up and running with our step-by-step video guide.

User manual

Download your Dyson HEPA Cool Formaldehyde user manual.

10.2MB

How to use your purifier

Understanding the LCD screen icons

The icons on your LCD screen show which pollutants are present, reporting them in real time. They also tell you about temperature, humidity and filter life.

  • Indoor Air Quality Index screen

    Indoor Air Quality Index (AQI)


    Shows your air quality over the last 12 seconds, or over the last 24 hours.

  • Particulate matter PM2.5 screen

    Particulate matter PM2.5


    Shows microscopic particles smaller than 2.5 microns, including smoke, bacteria and allergens.

  • Particulate matter PM10 screen

    Particulate matter PM10


    Shows particles smaller than 10 microns, including pollen, dust and pet dander.

  • Formaldehyde screen

    Formaldehyde (HCHO)


    Shows particles of formaldehyde, a volatile gas that can emit for years from household flooring and furniture.

  • Volatile Organic Compounds screen

    Volatile Organic Compounds (VOCs)


    Shows gases released from a wide range of sources, such as aerosol sprays and air fresheners. They include benzene, household fumes and odours.

  • Nitrogen Dioxide screen

    Nitrogen Dioxide (NO2)


    Shows oxidising gases such as NO2, released by combustion. Includes cigarette smoke, car emissions, candles and gas stoves.

  • Filter life screen

    Filter life


    Shows how much filter life remains on the HEPA+Carbon filter. So you know when to replace it.

Understanding pollutant levels

When a pollutant reduces your air quality, its icon appears on screen. In this case, PM10. The coloured bar on the left indicates how much of the pollutant is present, and will continually update as the machine purifies your air.

  • Good pollutant levels screen

    Good


    When the green section of the coloured bar is highlighted, your purifier is detecting a very low level of the type of pollutant.

  • Fair pollutant levels screen

    Fair


    When the yellow section of the coloured bar is highlighted, your purifier is detecting a moderate level of the type of pollutant.

  • Poor pollutant levels screen

    Poor


    When the orange section of the coloured bar is highlighted, your purifier is detecting a high level of the type of pollutant.

  • Very poor pollutant levels screen

    Very poor


    When the red section of the coloured bar is highlighted, your purifier is detecting a very high level of the type of pollutant.

Using the remote control

  • Activate Auto mode


    Select Auto mode and your on-board sensors will intelligently adjust settings according to your air quality.

  • Setting the oscillation angle


    Watch our video guide on how to customise the angle of oscillation for your machine. Choose from a range between 45° up to 350°.

  • Adjusting the airflow


    Both the speed and direction of airflow can be adjusted. For powerful, personal cooling from the front, or diffused air diverted through the back of the machine.

  • Sleep timer and Night mode


    Set the Sleep timer to turn your purifier off, or use Night mode for the quietest settings and a dimmed screen.

Maintaining your purifier

To ensure optimum air purification performance, we recommend replacing your HEPA+Carbon filter every 12 months. Your Catalytic filter never needs replacing.

Works with smart voice control

Control your Dyson purifier with your voice.2

  • Amazon Alexa


    Ask Alexa to enable the Dyson skill, to control your Dyson purifier. And set a routine that automates how your machine works with other devices in your home.

  • Google Home


    Just say “Hey Google” and you can use Google Assistant to control all your connected purifiers. Or set a routine to automate how your machine works with other devices in your home.

  • Siri Shortcuts


    Connect your Dyson machines to Siri Shortcuts and you’ll be able to control them with your voice, on your Apple device.



Some things you can say:

When you've connected your Dyson purifier to your
voice assistant, you could try saying:

"Alexa, turn on my Dyson machine"
"Hey Google, turn up the temperature"
"Hey Siri, enable Auto mode"

Connecting your purifier

Follow these three steps to connect your purifier to the Dyson Link app.1

  • Phone with app on screen

    Step 1


    Download the Dyson Link app to your mobile device, open and select 'Add machine' from the menu. Then select your purifier.

  • Phone held next to purifier

    Step 2


    Hold your device next to your purifier's LCD screen. This will allow your machine to detect your mobile device.

  • Pressing the Standby button

    Step 3


    Press the Standby button on your purifier to activate the pairing process. Then follow the on-screen instructions to complete connection set-up.

Get more from your purifier with the Dyson Link app1

The Dyson Link app lets you control your air purifier – wherever you are. You can turn it on or off, adjust the settings, change modes or check air quality remotely. If you haven't already, download the app now for extra features and the latest updates.

Dyson Link app rated 4.2 out of 5 (average as of May 2020)

Using the Dyson Link app1

  • App scheduling

    Set and forget


    View real-time or historic air quality data wherever you are, or set and forget with advance 7-day scheduling.

  • App controls

    Instant control


    Your primary controls are now instantly accessed on the home screen, including power, fan speed and temperature.

  • App Help section

    Help is at hand


    Not sure what NO2 or VOCs are? Find instant answers to air quality questions in our app's help section.

Frequently asked questions

Increasing airflow will create a cooling effect using purified air, so you may find it beneficial to change your purifier's speed settings as the temperature changes. For personal cooling in summer, use settings 4-10. In colder periods, enable diffused mode. It projects air through the back of the machine, to avoid unwanted cooling.

If you're concerned by the brightness of your purifier's LCD display, consider enabling Night-time mode using your remote control or the Dyson Link app. During operation, a small moon icon indicates that your purifier is on, but the main display turns off after 10 seconds to help avoid sleep disturbance.

If auto mode is enabled, AUTO will be illuminated on your purifier's LCD display. When your machine is purifying the air, AUTO will be in white. When the air in the room is purified, it will turn green and your purifier will remain idle until pollutant levels rise.

Your purifier's auto mode is designed to manage the air quality in your space without you having to operate the machine – so it's only on when it needs to be.

Dyson Experts are on hand to better understand your business environment and can advise about where to place your purifier to best suit your space. When placing the machine, make sure there is at least a few feet of clearance on all sides so that the air can circulate effectively.

Your purifier works most efficiently in a sealed environment – opening the windows can allow more pollutants to enter the air inside, which means your machine will take longer to work.

The formaldehyde-destroying catalytic filter never needs replacing. And we recommend replacing the HEPA+Carbon filter every 12 months (based on 12 hours a day of use) – so this may vary depending on usage and pollution levels. You'll be notified via the Dyson Link app or LCD screen when it's time to replace it.

No, unlike some conventional filters which require changing, washing and drying each month, this isn't the case with ours. So there's no time wasted without a working purifier. Our filter is quick and easy to replace – and you'll know exactly when, via the Dyson Link app or LCD screen. Please note that the selective catalytic oxidisation filter never needs replacing.

The Dyson guarantee

  • 'How to' Logo

    'How to' videos

    To help you get the most from your machine. Quick and easy.

  • Helpful tips Logo

    Helpful tips

    Tailored reminders that will keep your machine working at its best, for longer.

  • Exclusive owners Logo

    Exclusive owner benefits

    Priority access to previews of new Dyson technology, events and offers.

  • Advice Logo

    Expert advice

    Freephone and live chat. Open 8am - 7pm Monday to Friday, 8am - 5pm Saturday.

  • Parts and labour Logo

    Free Dyson parts and labour

    Replacement parts or repairs if something goes wrong during your guarantee period.

  • Hassle-free replacement Logo

    Hassle-free replacement

    If we can’t repair your machine, we’ll replace it while it's under guarantee. Fast.

We don’t stop caring about our machines once they’re yours. Activating your guarantee allows us to give you a tailored, complementary, direct service for your machine. Even after your guarantee has ended, we’ll still be on hand to help.

Talking to us is easy.

You can call us
1800 239 766

1 Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply.

2 Refer to the Dyson Link app for compatible voice services.