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£929.99
Dyson Purifier Big+Quiet Formaldehyde BP04 (Prussian Blue/Gold)
Our quietest, most powerful air purifier.
For large spaces up to 100m².
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Dyson Purifier Big + Quiet Formaldehyde
Overall rating
In the box
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Dyson Purifier Big + Quiet Formaldehyde
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Our quietest, most powerful purifier. For a healthier home environment.
Purifies any room – including large, open-plan spaces up to 100m².¹ Captures pollutants, allergens and odours, yet does it quietly.
Machine highlights
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50% quieter, even at full power
Acoustically engineered to produce less noise. Night mode is 50% quieter than any other Dyson purifier. With a Sleep timer so you can set it and forget it.
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Powerful projection to cool you down
Delivers over 22 gallons of purified air per second. Adjust the angle of airflow between 0°, 25° or 50°, or mimic the feeling of refreshing air indoors using Breeze mode.
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Long-lasting filter
The HEPA H13-grade filter lasts up to 11 years.⁹ Remove and dispose in one click.
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Control via the app
Monitor what’s been captured, set schedules, browse reports, and more with the MyDyson™ app.¹⁰
Discover the pioneering technology inside
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Get more with the MyDyson™ app⁶
Discover what you get with the app.
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Expert guides
Learn how to improve your indoor environment.
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Machine upgrades
See how to upgrade to the latest Dyson technology.
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Priority access
Latest Dyson technology and events.
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2-5-year guarantee
On parts, repairs and replacements.
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Exclusive offers
Gain access to exclusive offers through the app.
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24/7 support
Machine performance updates.
Frequently asked questions
Which is the best air purifier?
The Dyson Purifier Big+Quiet Formaldehyde is our most advanced, quietest, and most powerful air purifier. As our latest top-of-the-range purifier, it uses cone aerodynamics to deliver powerful, long-range air projection – circulating purified air and driving even distant pollutants back through sealed filters. For whole-room purification – capturing 99.95% of ultrafine particles², even in large spaces.¹ You can control your air quality, wherever you are. At the touch of a button you can monitor the air quality levels in your home using the MyDyson™ app⁶ – viewing in real-time the benefits of owning an air purifier.
Not all purifiers are equal. Getting the right size purifier, with the best projection is essential to ensure it will effectively purify the air in your space. We've tested the Dyson Purifier Big+Quiet Formaldehyde 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. The Dyson Purifier Big+Quiet Formaldehyde also has our largest ever filtration system – and the 360° HEPA H13-grade filter doesn’t need replacing for up to 5 years.
What is the Dyson Big+Quiet Formaldehyde air purifier range designed to do?
The Dyson Purifier Big+Quiet Formaldehyde air purifier range is engineered to remove 99.95% of ultrafine particles², such as dust, allergens, odours, gases³ like benzene and nitrogen dioxide and even formaldehyde gas.⁵
How long do the filters in the Dyson Big+Quiet Formaldehyde last?
The Dyson Purifier Big+Quiet Formaldehyde has our most advanced filtration system. We recommend replacing the 360° HEPA H13-grade 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 (SCO) filter is permanent and never needs replacing.
Where should I position 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 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.
How easy is the Dyson Purifier Big+Quiet Formaldehyde to move?
The Dyson Purifier Big+Quiet Formaldehyde has discreet wheels, which aren’t visible when the machine is upright. These wheels are designed for hard floors – so you can move your purifier around easily.
- 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).