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Our quietest most powerful purifier

We’ve engineered an energy efficient system that projects air over 10 metres to purify large spaces.¹ Quietly.

Our quietest most powerful purifier

We’ve engineered an energy efficient system that projects air over 10 metres to purify large spaces.¹ Quietly.

Innovative amplifier design

Two high velocity jets of purified air are forced to train around a high pressure core and join to create one powerful condensed jet of purified air.

Motor bucket

Acoustically engineered to operate quietly – even at its highest power settings.

Integrated sensor system

A suite of sensors interacts with a unique algorithm to detect pollutants across a whole room and report automatically.

Advanced filtration system

Three phases of purification sit within a fully-sealed machine.⁶ Capturing 99.95% of ultrafine particles², gases³ and destroying formaldehyde.⁵

Innovative amplifier design
Motor bucket
Integrated sensor system
Advanced filtration system
The Dyson Purifier Big+Quiet Formaldehyde's internal technology.

Dyson Purifier Big+Quiet Formaldehyde BP03

Overall rating

93% of reviewers would recommend to a friend.

Frequently asked questions

What’s new about the Dyson Purifier Big+Quiet range?​ 

While our current generation purifiers circulate clean air around the whole room¹⁰, the Dyson Purifier Big+Quiet projects air over 10 metres, creating the circulation power to purify large spaces.¹ Featuring our largest ever filtration system, the purifier captures 99.95% pollutants², gases³ and destroys formaldehyde.⁵ It’s acoustically engineered to operate quietly – even at its highest power setting.

What size room can the Dyson Purifier Big+Quiet Formaldehyde purify?

We've tested the Dyson Purifier Big+Quiet extensively – to ensure the sensors, filtration system and motor work together to purify a large living space. It has the projection power to purify spaces up to 100m2.¹

How does the machine purify a whole room?​

We’ve re-engineered our purifiers to deliver three key features to purify a whole room evenly.¹ Long range projection creates the circulation power to draw even-distant pollutants back to the purifier. An integrated sensor system accurately detects and reports pollutants. Finally, an advanced HEPA H13 grade filtration system captures gases³ and ultra-fine particles,² destroying formaldehyde.⁵ Purified air is then projected back into the room and the cycle repeats. 

What is formaldehyde?

Formaldehyde is a colourless and potentially harmful gas that can be found in many household products and emitted for years. 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 Purifier Big+Quiet Formaldehyde range traps formaldehyde in tunnels, breaking it down into water and CO2.⁵ This is done by a lifetime Selective Catalytic Oxidation filter which does not need replacing.

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.¹¹ 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.¹²

  • 1 The ability of purifying a large room up to 100m2 (10m*10m) proven from a Computational Fluid Dynamics (CFD) modelling, with the purifier placed in a corner of the room running at the maximum flow and horizontal projection reaching 10 metres to fully mix the room. The projection distance was measured from internal flow reach testing under the maximum directional airflow. The actual performance in real life condition may vary.
  • 2 Tested for filtration efficiency at 0.1 microns (EN1822, ISO29364).
  • 3 Tested to JEM 1467 (acetic acid, acetaldehyde, ammonia), GB/T18801 (formaldehyde, benzene) and DTM-003282 (NO2). Gas capture rates vary.
  • 4 Compared to absorption by the standard carbon filter in Dyson Purifier Big+Quiet Formaldehyde (BP03).
  • 5 Third party full machine testing based on GB/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved. Results may vary in practice.
  • 6 Particle challenge by DEHS oil specified in EN1822 within a chamber specified in ASTM F3150. Tested in Max Mode at IBR US, for whole machine efficiency above 99.95%.
  • 8 App functionality may vary per market. Requires Wi-Fi and app enabled device. Standard data and messaging rates may apply. Requires iOS version 10 or above, or Android version 5 or above. Your mobile device must have Bluetooth 4.0 support.
  • 9 Levels defined by Dyson based on scientific literature. Ventilation alert when CO2 levels are 1500ppm or above.
  • 10 In maximum setting. Tested for air projection (DTM 801) and purification coverage in a 81m3 room (TM-003711).
  • 11 In Auto mode.
  • 12 Vs. TP09