Skip navigation Accessibility Statement
Thanks. We've saved your preferences.
You can update your contact preferences at any time in the Keep in touch section of Your Dyson. If you have a Your Dyson account, you can log in below to manage your contact options.


Support for your Dyson Purifier Big+Quiet Formaldehyde

Dyson Purifier Big + Quiet Formaldehyde BP03 (Bright Nickel/Prussian Blue)

Frequently asked questions

Where should I place the Dyson Purifier Big+Quiet Formaldehyde in my room?

The Dyson Purifier Big+Quiet has been designed to work from the corner of a room, at least three and a half feet away from the wall. For optimal performance we recommend projecting air either along a wall or across the room. You can adjust the angle of projection to suit your preference. 

Can I leave my Dyson air purifier on all the time?

Dyson purifiers are optimal when left switched on in auto-mode. This allows the purifier to constantly monitor your air quality, and automatically sense and capture pollutants. It adjusts the airflow speed, only purifying when needed.³ The Dyson Purifier Big+Quiet range offers enhanced energy efficiency, providing nearly double the clean air delivery rate per watt versus our current generation purifiers. 

Is maintenance required for the filters?

No. Some purifiers rely on you changing, washing and drying the filters each month. The time spent waiting for the filter to dry is time without a working purifier. With the Dyson Purifier Big+Quiet Formaldehyde, you don’t need to waste time washing and drying the filters. The indicator is designed to remind you to replace both filters.

How often does the filter need to be changed?

The H13 grade HEPA filter lasts up to five years, but we recommend you replace the activated carbon filter every two years. The selective catalytic oxidisation filter is permanent and never needs replacing.

Can I order a new filter through the app?

The app provides a link to the Dyson website. A user will be notified when the filter has 10% and 2% of its life remaining.

Does the LCD display stay on throughout the night?

If you're concerned by the brightness of your purifier's LCD display, consider enabling Night mode using your remote control or the MyDyson™ 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.

Can multiple app users share the same machine?

Yes, an unlimited number of app users can control a single machine. The machine will only ever choose the most recent update. For example, if more than one person is updating the scheduling, the most recent change will be the one the machine progresses with.

Does the sensor on the product ever need to be reset?

The VOC sensor is very sensitive and can sometimes be contaminated by strong solvents. The sensor will recover naturally over a couple of days. To immediately reset the sensor, remove power to the machine at the plug for 30 seconds and then reapply it. This will cause the sensor to perform a short recalibration.