Dyson Purifier Big+Quiet Formaldehyde
Getting started
- A real-time LCD display screen reports indoor air quality.
- Sensors are on the side of the machine.
- Curved remote fits onto the front of the machine.
MyDyson™ app
The MyDyson™ app is essential to get the most from your air purifier. You can track current and historical data, control your machine from wherever you are, set schedules, and track filter life.
- Image of the 360° HEPA filter in the Dyson purifier big+quiet formaldehyde.
- The pleated carbon filter is wrapped around the central body of the purifier.
- Image of a selective catalytic oxidation filter that will never need replacing.
- Below the machine are hidden wheels for easy manoeuvrability on hard surfaces.
Assembling your machine
Use both hands to lift your machine out of the box by its base.
Your machine comes with a HEPA filter, carbon filter, and permanent catalytic filter. These are already installed on your machine.
Lift the conic amplifier out of the box and place it on the top of your machine. Rotate the conic amplifier until it clicks securely into place. Plug in and press the power button on the screen or remote control.
The image demonstrates how to assemble the Dyson purifier big+quiet formaldehyde’s conic amplifier. Position and twist. A click indicates a secure lock.
Place the remote control on the front of your machine with the buttons facing down.
The image demonstrates the location of the standby button and remote control.
Positioning your machine
Your machine is fitted with wheels to make it easier to move. Position your machine on a level floor.
For the most effective purification, position your machine on the edge of the room at least 1 metre from the wall, with the conic amplifier pointing to the furthest point, along the wall.
You can also position your machine facing diagonally across the room.
Connecting to the MyDyson™ app
Take full control with the MyDyson™ app and access step-by-step setup and support, control how and when your Dyson air purifier operates, monitor air quality with visual updates and automatically keep up to date with the latest software updates.
Download the MyDyson™ app from the App Store or Google Play.
Open the app and follow the on-screen instructions to create a new account.
Connecting to your smart home
Using Amazon Alexa
Ask Alexa to enable the Dyson skill – to help control your air purifier.
Set a routine that automates how your machine works with other devices in your home.
Using Google Assistant
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.
Using Siri
Connect your Dyson machine to Siri Shortcuts to control it by voice on your Apple device.
Power on/off
Press the Stand-by on/off button on your Dyson air purifier or remote control to start/stop your machine. It will continue to monitor the air quality.
Continuous monitoring
Continuous monitoring is turned off by default. You’ll need to activate it to see your historic AQ data.
With continuous monitoring active, your Dyson air purifier will gather air quality and temperature information, displaying it on the LCD screen and in the MyDyson™ app.
Continuous monitoring on/off
You’ll be prompted to activate Continuous monitoring on the MyDyson™ app. To turn it on or off using the remote control, press and hold the Auto mode button for five seconds. The LCD screen will indicate the Continuous monitoring status.
Wi-Fi connectivity
Wi-Fi is turned on by default. To turn the Wi-Fi on or off, press and hold the Stand-by on/off button on your machine for five seconds.
Information menu
Press this button to scroll through information monitored by your Dyson air purifier.
Information about air quality, temperature, humidity and filter levels is shown on the LCD screen. When a particular type of pollutant causes air quality to decrease, a symbol for the pollutant will show on the LCD screen.
Indoor air quality
The air quality graph shows the last 12 seconds of data.
Particulate matter (PM10)
Larger microscopic particles up to 10 microns in size, suspended in the air we breathe. These include dust, mould and pollen.
Nitrogen dioxide and other oxidising gases
Potentially harmful gases are released into the air by combustion from cooking and vehicle exhaust emissions.
Indoor humidity
The amount of water vapour in the air, shown as a percentage.
Formaldehyde (HCHO)
A common indoor pollutant released for many years from furnishings, floorings and glue.
Carbon dioxide (CO2)
CO2 can build up indoors without adequate ventilation, which can impact cognitive function.
Particulate matter (PM2.5)
Microscopic particles up to 2.5 microns in size, suspended in the air we breathe. These include smoke, bacteria and allergens.
Volatile organic compounds
VOCs are potentially harmful odours found in cleaning products, paints and furnishings.
Indoor temperature
Monitor the ambient temperature of the room.
Filters
The remaining filter life on the LCD screen indicates when filters need replacing.
Wi-Fi
The current status of the connection to the Wi-Fi network.
Auto purify
Set your air purifier to Auto mode, and the on-board sensors will intelligently adjust the settings of the machine according to the air quality.
- Air quality: Your machine will pause when the target air quality has been reached, switching on again when the air quality levels drop.
- Airflow speed: The airflow speed will increase to its maximum until the target air quality has been reached.
The remote control with the Auto mode button highlighted on the left-hand side.
Set airflow speed and direction
Increase or decrease the airflow speed and change the air direction from 0° to 50° using the remote or MyDyson™ app.
Select Breeze mode by repeatedly pressing down on the airflow direction button until it activates or by using the MyDyson™ app.
The remote control with the airflow speed toggle button on the left-hand side and the airflow direction button on the right-hand side.
Night mode and Sleep timer
In Night mode, your Dyson air purifier will continue to clean the air quietly, in a lower airflow speed with its LCD screen dimmed. Press the Night mode and Sleep timer button to scroll through the timer options.
The remote control with the Night mode button on the bottom right and the Sleep timer button on the bottom left.
Changing your HEPA filter
The MyDyson™ app and the LCD screen will alert you when your filter life is running low. Replacement filters are available to buy on www.dysoncanada.ca
Remove the conic amplifier
Slide the Release button on the back of the conic amplifier to unlock. Lift the conic amplifier off your machine.
Lift the outer cover off the base of your machine.
Remove the filter
The HEPA filter is located in the outer cover. Press the filter release buttons located on the inner rim and lift the outer cover off the filter.
Dispose of the filter.
Install a new filter
Remove your replacement filter from any packaging. Place the filter on the base of your machine.
Place the outer cover over the filter and press down until it clicks securely into position. Place the conic amplifier on your machine and rotate until it clicks securely in position.
Plug in, switch on and reset your filter life.
Reset your HEPA filter life
It’s important to reset the filter life after replacing your filter. Press and hold the Night mode button on the remote control.
The LCD screen on your machine will count down from five until a tick appears on the screen. The filter life has been reset, and your machine is ready to use.
Pressing the night mode button on the bottom right of the remote control for 5 seconds.
Changing your carbon filter
The MyDyson™ app and the LCD screen will alert you when your filter life is running low. Replacements are available to buy on www.dysoncanada.ca
Remove the conic amplifier
Slide the Release button on the back of the conic amplifier to unlock. Lift the conic amplifier off your machine.
Lift the outer cover off the base of your machine.
Remove the filter
The carbon filter is wrapped around the central body of your machine. Pull each of the four clips towards you to release the filter.
Dispose of the filter.
Install a new filter
Remove your replacement filter from any packaging. Wrap the filter around the base of your machine, fit the clips in position and push each one to secure the filter.
Place the outer cover and HEPA filter back in position on the base of your machine. Place the conic amplifier on your machine and rotate until it clicks securely in position.
Plug in and switch on, and reset your filter life.
Reset your carbon filter life
It’s important to reset your filter life after you have replaced your filter. Press and hold the down airflow direction button on the remote control.
The LCD screen on your machine will count down from five until a tick appears on the screen.
The filter life has been reset, and your machine is ready to use.
Looking after your machine
To always get the best performance from your Dyson air purifier, it’s important to regularly clean it and check for blockages.
Cleaning your machine
If your machine is dusty, wipe with a damp, lint-free cloth.
Check the sensor inlets on the left-hand side of the conic amplifier for dust and debris. Look for dust and debris in the outer cover and in the conic amplifier.
Use a soft brush to remove dust and debris.
Don’t use detergents or polishes to clean your machine.
Eye icons identify where a user should regularly check for dust and debris, in the outer cover and conic amplifier. Use a soft brush on the areas highlighted to clean the purifier.
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Dyson Purifier Big+Quiet Formaldehyde-FAQs
Is the Dyson Purifier Big+Quiet Formaldehyde worth buying?
Yes. It delivers better air-cleaning performance than many earlier Dyson models while remaining extremely quiet, making it suitable for large rooms and everyday use.
Does the Dyson Big+Quiet purifier remove formaldehyde?
Yes. It not only captures formaldehyde but also destroys it continuously using a dedicated catalytic filter, preventing re-release into the air.
What pollutants does this Dyson purifier remove?
It removes fine particles, allergens, dust, odors, gases, and volatile organic compounds (VOCs), including formaldehyde from furniture and household items.
How long do the filters last?
The HEPA H13 filter can last up to 11 years, while the K-carbon filter typically needs replacement every two years, depending on usage and air quality.
Can I sleep with the Dyson air purifier running all night?
Yes. It is safe to run overnight, and continuous operation helps maintain cleaner air while you sleep.
Are air purifiers safe for the lungs?
Yes. By removing fine particles and allergens, air purifiers can support lung health, especially for people with asthma or allergies.
Can Dyson purifiers remove household dust?
Yes. The HEPA filter captures up to 99.97% of dust and microscopic particles, helping reduce dust buildup on surfaces.
How long does it take to clean a room?
Depending on room size and air quality, the purifier can noticeably improve air quality within 30 to 60 minutes.