Support for your Dyson Purifier Big+Quiet Formaldehyde
Here you can find helpful tips, video guides, maintenance advice, your user manual and more.
Using your purifier
Get more from your purifier with the MyDyson™ app. Monitor real time reports and make use of various modes as well as scheduling.
Enables you to change different functions. Curved and magnetised to store neatly on the machine.
Learn more about your machine, different modes and receive live air quality reports.
Understanding the LCD screen
Understand your air quality live reports from the LCD screen.
Air quality graph
Shows your air quality over the last 12 seconds, or over the last 24 hours.
Shows microscopic particles smaller than 2.5 microns – including smoke, bacteria and allergens.
Shows particles smaller than 10 microns – including pollen, dust and pet dander.
Volatile Organic Compounds level
Shows gases released from sources such as aerosol sprays and air fresheners. They include benzene, household fumes and odours.
Shows oxidising gases such as NO₂ – includes cigarette smoke, car emissions, candles and gas stoves.
Electrochemical cell precisely detects formaldehyde for the lifetime of the machine.
Works with smart voice control
Control your Dyson purifier with your voice
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.
Guides and helpful tips
Filter care for optimum performance.
How to replace the activated carbon filter
To keep your activated carbon filter working effectively, we recommend changing it every 2 years of use, or sooner if necessary.
How to replace the HEPA filter
To ensure optimum air purification performance, we recommend replacing your HEPA filter every 2 years, or sooner if necessary.