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Dyson Purifier Big + Quiet Formaldehyde BP04 Purifying fan (Prussian Blue/Gold)
Our quietest, most powerful and advanced air purifier.¹
With exclusive K-carbon filter. CO2 sensing. Captures 3x more NO2.²
Also cools you.³
Our quietest, most powerful air purifier. Purifies large spaces up to 100m², evenly.¹ And cools you in hot weather.
Advanced three-stage filtration with HEPA H13-grade, Activated carbon and Selective Catalytic Oxidisation filters.
Captures 99.9% of particles.² Removes dust, allergens, gases,¹ odours, viruses and bacteria. Reduces your exposure to pollen, pet dander and mould spores. Captures NO2, a common urban pollutant. Removes smoke particles from wildfires. Destroys formaldehyde.²
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Weight
11.9 kg
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Height
830 mm
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Length
43.4 cm
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Width
41.5 cm
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Dyson Purifier Big + Quiet Formaldehyde BP04 Purifying fan (Prussian Blue/Gold)
Overall rating
In the box
Dyson Purifier Big + Quiet Formaldehyde BP04 Purifying fan (Prussian Blue/Gold)
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HEPA H13 grade filter
The HEPA H13-grade filter captures ultra-fine dust, allergens, and 99.97% of particles as small as 0.3 microns.
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K-carbon filter
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Remote control
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.
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Advanced automatic sensing technology
Dyson air purifiers automatically diagnose air quality – sensing and capturing airborne particles, and displaying real-time air quality reports on your LCD screen or MyDyson™ app.⁷
Advanced automatic sensing technology
Dyson air purifiers automatically diagnose air quality – sensing and capturing airborne particles, and displaying real-time air quality reports on your LCD screen or MyDyson™ app.⁷
Allergens, pollen and black mould spores
Allergy season can be difficult. The Dyson Purifier Big+Quiet reduces your exposure to allergens, such as pollen and airborne mould spores. For cleaner indoor air.
Allergens, pollen and black mould spores
Allergy season can be difficult. The Dyson Purifier Big+Quiet reduces your exposure to allergens, such as pollen and airborne mould spores. For cleaner indoor air.
Bacteria, viruses and microscopic particles
Bacteria and viruses can spread more easily when we spend more time together indoors. The Dyson Purifier Big+Quiet is proven to capture 99.9% of viruses.⁸
Bacteria, viruses and microscopic particles
Bacteria and viruses can spread more easily when we spend more time together indoors. The Dyson Purifier Big+Quiet is proven to capture 99.9% of viruses.⁸
Pet odours, allergens and dander
Pets can bring unwanted odours and allergens into the home. Dogs and cats shed dander, releasing microscopic skin, saliva and urine allergens into the air.
Pet odours, allergens and dander
Pets can bring unwanted odours and allergens into the home. Dogs and cats shed dander, releasing microscopic skin, saliva and urine allergens into the air.
Cooking odours, pollutants and nitrogen dioxide
Cooking or burning any type of fuel can release odours and potentially harmful pollutants like NO. The Dyson Purifier Big+Quiet is 30% faster at reducing cooking odours by 97%.⁹
Cooking odours, pollutants and nitrogen dioxide
Cooking or burning any type of fuel can release odours and potentially harmful pollutants like NO. The Dyson Purifier Big+Quiet is 30% faster at reducing cooking odours by 97%.⁹
Household dust and airborne particles
Household dust is a complex mixture of microscopic particles, including dead skin cells, dust mites, dust mite droppings, small insects, pollen, smoke, mould spores and bacteria.
Household dust and airborne particles
Household dust is a complex mixture of microscopic particles, including dead skin cells, dust mites, dust mite droppings, small insects, pollen, smoke, mould spores and bacteria.
Real-time air quality diagnosis
In Auto mode, our integrated sensors detect pollutants from around the room and analyse air quality in real time, cross-checking the data every second, then automatically trigger purification, if required.
Machine highlights
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Quietly purifies, 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
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Always sensing
In Auto mode, your purifier reacts automatically to remove pollutants, only using energy when needed.
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Alerts you to high CO₂ levels
Reports and alerts you when CO₂ levels are harmfully high.
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Easy to manoeuvre
Discreet, hidden wheels designed for hard surfaces let you easily move your machine around the room.
Discover the pioneering technology inside
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Our most advanced suite of sensors
A suite of sensors interact with our unique algorithm, cross-checking pollution data every second and reporting live results onscreen or the MyDyson™ app.¹⁰
Our most advanced suite of sensors
A suite of sensors interact with our unique algorithm, cross-checking pollution data every second and reporting live results onscreen or the MyDyson™ app.¹⁰
Our most advanced filtration system
HEPA-H13, K-carbon and SCO filtration captures particles and gases including formaldehyde – within a fully sealed machine. So what goes inside, stays inside.¹²
Our most advanced filtration system
HEPA-H13, K-carbon and SCO filtration captures particles and gases including formaldehyde – within a fully sealed machine. So what goes inside, stays inside.¹²
Exclusive K-carbon filter
Impregnated with potassium carbonate, it adsorbs three times more NO₂.² Removing a common and potentially harmful pollutant. And lasts two years.⁹
Exclusive K-carbon filter
Impregnated with potassium carbonate, it adsorbs three times more NO₂.² Removing a common and potentially harmful pollutant. And lasts two years.⁹
Cone aerodynamic projection
Drives high-velocity air jets over the machine’s dome which coalesce to project a focused stream of air. To purify large spaces, quietly.³ Or cool you when required.
Cone aerodynamic projection
Drives high-velocity air jets over the machine’s dome which coalesce to project a focused stream of air. To purify large spaces, quietly.³ Or cool you when required.
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
For optimal performance, place the BP04 in a corner of the room, at least one metre away from the wall. Project air along a wall or across the room and adjust the angle of projection as needed. The discreet wheels make it easy to move the purifier around hard floors.
Yes – the BP04 uses a catalytic filter that breaks down formaldehyde into water and CO₂. It also features a solid-state sensor that detects formaldehyde continuously and accurately.
The BP04 is engineered to be up to 50% quieter than previous Dyson models, making it ideal for bedrooms, nurseries, and shared spaces.
Absolutely. The BP04 is designed for large environments, with long-range airflow that reaches across open layouts and tall spaces.
The machine will notify you via its display or the MyDyson™ app when the filter needs replacing. You can also check filter life manually in the app.
Yes, the BP04 works in these regions.
Yes – the BP04 connects to the MyDyson™ app, allowing you to monitor air quality, adjust settings, and schedule purifying sessions from anywhere.
The activated carbon filter in the BP04 absorbs gases and odours, making it effective against smells from cooking, pets, and household products.
The BP04 is designed with safety in mind. It operates quietly and efficiently, with no exposed blades or heat elements, making it suitable for family homes.
The BP04 is designed for large spaces up to 100m2. It combines long-range airflow, ultra-quiet operation, and advanced formaldehyde removal – making it Dyson’s most powerful purifier for large spaces.
- 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).
