Support for your Dyson Purifier Hot+Cool Formaldehyde
Dyson Purifier Hot+Cool Formaldehyde HP09
Watch how to quickly get up and running with our step-by-step video guide.
Connecting your purifier
Follow these three steps to connect your purifier to the Dyson Link app.1
Download the Dyson Link app to your mobile device, open and select 'Add machine' from the menu. Then select your purifier.
Hold your device next to your purifier's LCD screen. This will allow your machine to detect your mobile device.
Press the Standby button on your purifier to activate the pairing process. Then follow the on-screen instructions to complete connection set-up.
Voice control. All you have to do is ask.
Using your purifier is even quicker and easier with a compatible voice service like Google Assistant or Apple's Siri. You can enable the Dyson skill, or set this up via the Dyson Link app. Find out more about voice control.
Control all of your connected purifiers with Google or set a routine to automate how your machine works with other devices in your home. Just say “Hey Google” to get started.
Connect your Dyson machines to Siri Shortcuts and you’ll be able to control them with your voice, on your Apple device.
Try using these voice commands:
"Alexa, ask Dyson to increase fan speed."
"OK Google, ask Dyson to start oscillating."
"Hey Siri, ask Dyson to turn on Night mode."
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 (AQI)
Shows your air quality over the last 12 seconds, or over the last 24 hours.
Particulate matter PM2.5
Shows microscopic particles smaller than 2.5 microns, including smoke, bacteria and allergens.
Particulate matter PM10
Shows particles smaller than 10 microns, including pollen, dust and pet dander.
Shows particles of formaldehyde, a volatile gas that can emit for years from household flooring and furniture.
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 (NO2)
Shows oxidising gases such as NO2, released by combustion. Includes cigarette smoke, car emissions, candles and gas stoves.
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.
When the yellow section of the coloured bar is highlighted, your purifier is detecting a moderate level of the type of pollutant.
When the green section of the coloured bar is highlighted, your purifier is detecting a very low level of the type of pollutant.
When the orange section of the coloured bar is highlighted, your purifier is detecting a high level of the type of pollutant.
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
Purification and temperature settings
Select Auto mode and your on-board sensors will intelligently adjust settings according to your air quality.
Oscillation and airflow
Watch our video guide on how to customise the angle, speed and direction of airflow.
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.
Using the Dyson Link app
Set and forget
View real-time or historic air quality data wherever you are, or set and forget with advance 7-day scheduling.
Your primary controls are now instantly accessed on the home screen, including power, fan speed and temperature.
Help is at hand
Not sure what NO2 or VOCs are? Find instant answers to air quality questions in our app's help section.
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.
The Dyson guarantee
'How to' videos
To help you get the most from your machine. Quick and easy.
Tailored reminders that will keep your machine working at its best, for longer.
Exclusive owner benefits
Priority access to previews of new Dyson technology, events and offers.
Expert advice. 6 days a week.
Freephone and live chat. Open 9:30am – 6:00pm Monday to Saturday, Close on Sunday and public holidays.
Free Dyson parts and labour
Replacement parts or repairs if something goes wrong during your guarantee period.