Dyson Purifier Big+Quiet Formaldehyde in Prussian blue and gold
Purifies large spaces.¹ Quietly.
Our most advanced purifier captures pollutant particles, gases², odors and allergens* – for a healthier home environment.
Captures three times more NO₂, a common urban pollutant.⁴
Also destroys formaldehyde⁺ – emitted by some home furnishings.
And cools you³, when required.
Our quietest, most powerful purifier. For a healthier home environment.
Purifies any room - including large, open-plan spaces.¹ Captures pollutants, allergens* and odors, yet does it quietly.
Key features
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Powerful projection to cool you in summer³
Cone aerodynamics for powerful, long-range air projection. Delivers more than 21 gallons of purified air per second. To cool you and purify the whole room.
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Quietly purifies, even at full power
Our quietest purifier is acoustically engineered to produce less noise. With Night mode that’s 50% quieter than any other Dyson purifier.
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Adjust your airflow
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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Control your air quality wherever you are
The MyDyson™ app lets you monitor your home air quality from anywhere, see what’s been captured, set schedules, browse reports, and more.⁵
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Auto mode
In Auto mode, your purifier reacts automatically to remove pollutants, only using energy when needed.
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Hygienic filter replacement
A hygienic replacement mechanism allows you to dispose of the HEPA filter in one click.
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Easy to manoeuvre
Discreet, hidden wheels designed for hard surfaces let you easily move your machine around the room.
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Smart home purification
Connect and then control your air quality, hands-free, with compatible smart home voice services.⁵
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Alerts you to high CO₂ levels
Reports and alerts you when CO₂ levels are harmfully high.⁶
Senses and captures pollutants, projects purified air
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Advanced sensing. Unique algorithms.
Our most advanced suite of sensors interacts with a unique algorithm, cross-checking data every second, to automatically detect pollutants, and report live results on the LCD screen or MyDyson™ app.⁵
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Fully sealed to HEPA Standard⁹
Three-stage HEPA H13, K-Carbon and SCO filtration captures particles, gases² including NO₂, and destroys formaldehyde⁺. All within a fully-sealed HEPA machine. So what goes inside, stays inside.⁹
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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 spaces¹, quietly. Or cool you when required.
Many indoor activities can emit pollution. Cleaning, decorating, cooking, even getting ready for work can produce airborne particles and gases.
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VOCs from aerosols and cleaning products
Household cleaning sprays and disinfectants can release volatile organic compounds (VOCs).
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Formaldehyde fumes from paints and glues
Formaldehyde is a potentially harmful gas released by some furniture, paints, glues, carpets and fabrics.
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Cooking odours and combustion pollutants
Cooking doesn’t just leave lingering odors, it can also release pollutants like NO₂ when any fuel is burned. Which can build up in your home.
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Pet odors, allergens* and dander
Pets can bring unwanted allergens and odors into the home, which can stay in the air and settle on furniture.
Dyson Purifier Big + Quiet Formaldehyde BP04 (Prussian Blue/Gold)
Get more with the MyDyson™ app▴
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.
Choose your model
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Weight
26.24 lb
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Oscillation/Angle
50 degrees
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Number of speed settings
10
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Height
32.68 in
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Length
16.34 in
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Width
17.09 in
Frequently asked questions
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 particles, 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™ app⁵ – 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 32 feet.¹ 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.⁹
The Dyson Purifier Big+Quiet Formaldehyde air purifier range is engineered to remove 99.95% of ultrafine particles, such as dust, allergens*, odors, gases² like benzene and nitrogen dioxide and even formaldehyde gas.
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.
The Dyson Purifier Big+Quiet Formaldehyde has been designed to work from the corner of a room, at least three 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.
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.
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Allergens
An allergen is a substance that can cause an allergic reaction by triggering the body’s immune system. Common indoor allergens include pet dander and pollen.¹⁰
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Bacteria
Microscopic, single-celled organisms that can exist in their millions, in every environment. Not all bacteria are harmful, but some can have adverse effects, such as E. coli.¹⁰
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Benzene
Benzene is colorless, flammable liquid produced by both natural and man-made processes. It’s a natural part of crude oil, gasoline, and cigarette smoke. Indoors, it comes from products such as glues, paints, furniture wax, and detergents.
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Carbon dioxide (CO₂)
A colorless greenhouse gas, which comes from the extraction and burning of fossil fuels. Increased CO₂ levels can impact cognitive function.
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Formaldehyde
This colorless, flammable gas is used in some building materials and household products. Sources can include some fabrics found in flooring and furniture, glues, paints, varnishes, air fresheners, and household cleaners.
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HEPA 13
HEPA (High Efficiency Particulate Air) is an air filter efficiency standard and a measure of a filter’s performance. To achieve this standard, filters must meet a minimum of 99.95 per cent particle removal at the most penetrating particle size.
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Humidification
A process of increasing air moisture content through the addition of water vapor or steam. Humidifiers can add moisture to the air in dry conditions, creating a more comfortable indoor environment when needed.
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Microns
Airborne particles are usually described in microns. One micron is equal to one-millionth of a meter. The human eye can see debris and dust that are approximately 25 microns in size.
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Nitrogen dioxide (NO₂)
Nitrogen dioxide is a liquid below 70.2°F and a gas at higher temperatures. It is toxic to humans in both states in high concentrations. Gas stoves and space heaters are the most common indoor sources of NO₂ emissions. Other sources include improperly vented furnaces and water heaters.
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Pet dander
Pet dander is made up of tiny particles of skin, saliva and urine, shed by animals with fur or feathers. Pet dander lingers in the air before settling on surfaces such as furniture, bedding, and fabrics. Exposure to these airborne particles can trigger allergies.¹⁰
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Particulate matter (PM)
Particulate matter contains microscopic solids or liquid droplets, measured in microns. Indoor PM can be generated through many day-to-day activities such as cooking, cleaning, and the burning of candles and fires.
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Purification
The process of reducing unwanted contaminants. Air purification is intended to remove airborne pollutants. Depending on the method, air purification can remove dust, allergens, or viruses.10
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Volatile organic compounds (VOCs)
Volatile organic compounds are potentially harmful gases found in many household products. Common sources include paints, varnishes, air fresheners, cosmetics, and cleaning products.
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Pollen
Pollen is a powdery substance released from seed plants as part of their reproduction process. It typically appears from trees in the spring, grasses in the summer, and weeds in the autumn. Pollen grains are among the most common allergens.¹⁰
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Aspergillus mold
A common name for a visible group of fungi, mold thrives wherever there is dampness – sending out millions of spores into the air. Exposure to mold occurs via inhalation, skin contact, or ingestion.¹⁰
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▴The MyDysonTM app is only compatible with select Dyson products. For a list of compatible products, please click here.
*Allergens refers to nonliving material.
⁺Third party full machine testing based on GB/T 18801-2015 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved. Results may vary in practice.
¹Testing for PM2.5 purification completed in a large testing chamber following relevant Dyson testing methods. Results may vary in practice.
²Gas capture rates may vary
³Fan; not air conditioning unit.
⁴Compared to adsorption by the standard carbon filter in Dyson Purifier Big+Quiet Formaldehyde (BP03).
⁵Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply. Refer to the MyDyson app for compatible voice services.
⁶Levels selected based on scientific literature. Ventilation alert when CO2 levels are 1500ppm or above.
⁹Particle challenge by DEHS oil specified in EN1822 within a chamber specified in ASTM F3150.
¹⁰Not intended as a product claim. Refer to individual Dyson models for specific capture claims.