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New technology Dyson purifier Big+Quiet Formaldehyde logo
Dyson purifier Big+Quiet Formaldehyde.
In stock

Dyson purifier Big+Quiet Formaldehyde.

Dyson Purifier Big + Quiet Formaldehyde BP04 (Prussian Blue/Gold)

Purifies large spaces.⁺ Quietly.

Detects and destroys formaldehyde, permanently.¹

Removes gases and odors.³ Captures 3x more NO₂.⁴

Captures allergens and 99.97% of fine particles.²

Senses and reports CO₂ levels in real-time.

Dyson's largest ever filtration system.

  • Weight

    26.24 lb

  • Oscillation/Angle

    50 degrees

  • Number of speed settings


Dyson purifier Big+Quiet Formaldehyde.
  • Height

    32.68 in

  • Length

    16.34 in

  • Width

    17.09 in

Dyson Purifier Big + Quiet Formaldehyde BP04 (Prussian Blue/Gold)

Overall rating

78% of reviewers would recommend to a friend.

Greatly improved air quality


When I first received it, I experimented and ran it in a smaller room that smelled musty and it cleared it right up in about an hour or two. I was astounded! It cleared out cooking odors in the kitchen, also. Not only does it operate so well, it's good looking too. I love the modern design of the unit and the mini remote that magnetically attaches to the front. It's a conversation piece for sure!

Frequently asked questions

What is the Dyson Big+Quiet Formaldehyde air purifier range designed to do?​

Sources of formaldehyde can include woods, glues, paints, varnishes, air fresheners, mattresses, household cleaners, and some fabrics found in household flooring and furniture. The Dyson Formaldehyde air purifier range includes a catalytic filter that traps formaldehyde in tunnels, breaking it down into water and CO₂.⁵

What exclusive technology do I get when I buy the Dyson Big+Quiet Formaldehyde direct from Dyson?

Our Direct exclusive model comes in a new Prussian blue and gold colour. It has a K-Carbon filter that adsorbs 3x more NO₂⁴ – a common indoor pollutant. And a new integrated sensor that detects and reports CO₂ levels, notifying you when they exceed recommended limits.​⁶

How long does the Dyson Big+Quiet Formaldehyde filter last?​

The Dyson Purifier Big+Quiet Formaldehyde has our largest ever filtration system. We recommend replacing the H13 grade HEPA filter after using it for up to five years or sooner. The K-Carbon filter should be replaced every two years or sooner if required. The selective catalytic oxidisation filter is permanent and never needs replacing. ​

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

The Dyson Purifier Big+Quiet Formaldehyde 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. ​

How easy is the Dyson Purifier Big+Quiet Formaldehyde to move?​

The Dyson Purifier Big+Quiet Formaldehyde has discreet wheels which are not visible when the product is upright. These wheels are designed for hard floors – so you can move your purifier around easily. 

Dyson Purifier Big+Quiet Formaldehyde in a large space.

Projects air over 32 feet and purifies large spaces.⁺ Quietly.

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