The Dyson Purifier Big+Quiet has been designed to work from the corner of a room, at least one metre 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. 

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.² 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.

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.

We recommend replacing your HEPA filter after using it for up to five years or sooner. The activated carbon filter should be replaced every two years or sooner if required. The app or machine will alert you when it's time to replace your filter.

Yes, 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.

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.

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.

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.