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

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

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 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

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 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 is a complex mixture of microscopic particles, including dead skin cells, dust mites, dust mite droppings, small insects, pollen, smoke, mould spores and bacteria.

Solid-state formaldehyde sensor for lifetime precision. Detects formaldehyde molecules 500 times smaller than 0.1 microns.

Detects NO₂ pollution released by cooking, burning, car exhausts and gas appliances.

Detects fine particulate matter such as dust particles, skin flakes, allergens, pollen, mould spores and bacteria particles.

Detects CO₂ released by burning wood, coal, oil or gas, and alerts you to ventilate the room when CO₂ levels are too high.

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.

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.

The HEPA H13-grade filter lasts up to 11 years.⁹ Remove and dispose in one click.

Monitor what’s been captured, set schedules, browse reports, and more with the MyDyson™ app.¹⁰

In Auto mode, your purifier reacts automatically to remove pollutants, only using energy when needed.

Reports and alerts you when CO₂ levels are harmfully high.

Discreet, hidden wheels designed for hard surfaces let you easily move your machine around the room.

Dyson's 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

Dyson's 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

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.