The Dyson Purifier Big+Quiet™ Formaldehyde has our largest ever filtration system. The H13 grade HEPA filter lasts up to 5 years, but we recommend you replace the carbon filter every 2 years.
The selective catalytic oxidisation (SCO) formaldehyde filter is permanent and never needs replacing.
How do I replace the HEPA filter?
The MyDyson™ app and the LCD screen will alert you when your Dyson Purifier Big+Quiet™ Formaldehyde’s filter life is running low. Replacement filters are available to order direct from Dyson.com.
- To 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.
- To remove the HEPA filter in the outer filter cover, press the filter release buttons located on the inner rim and lift the outer cover off the filter.
- Dispose of the old filter.
- To install your 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.
How do I reset my 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.
How do I replace the Carbon filter?
The MyDyson™ app and the LCD screen will alert you when your filter life is running low. Replacements are available to order direct from Dyson.com.
- To 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.
- To remove the carbon filter wrapped around the central body of your machine, Pull each of the four clips towards you to release the filter.
- Dispose of the filter.
- To install your 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.
How do I reset my 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.
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