The Dyson Purifier Big+Quiet Formaldehyde BP04 is a high-capacity air purifier engineered for large indoor spaces, combining advanced filtration, intelligent sensing and long-range airflow with ultra-quiet operation. It is designed to deliver consistent whole-room purification in open-plan areas and large rooms.
The purifier features a fully sealed, multi-stage filtration system, including:
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HEPA H13 filter – captures 99.97% of particles as small as 0.3 microns, including dust, allergens and bacteria
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Activated carbon (K-Carbon) filter – removes gases, odors and absorbs higher levels of pollutants such as nitrogen dioxide (NO₂)
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Selective Catalytic Oxidation (SCO) filter – continuously destroys formaldehyde, converting it into water and CO₂ without requiring replacement
The BP04 is equipped with advanced sensors that continuously monitor indoor air quality, detecting:
- Particulate matter (PM2.5 and PM10)
- Volatile organic compounds (VOCs)
- Nitrogen dioxide (NO₂)
- Carbon dioxide (CO₂)
- Formaldehyde
These sensors provide real-time air quality feedback, displayed on the integrated LCD screen and accessible through the MyDyson™ app, allowing users to monitor and control the purifier remotely.
A key feature is Cone Aerodynamics technology, which produces a focused jet of purified air capable of projecting airflow up to approximately 10 meters. This ensures effective circulation and purification across large spaces.
Despite its high performance, the BP04 is designed for ultra-quiet operation, using acoustically engineered components to minimize noise, making it suitable for continuous use in homes or offices.
The device offers multiple operating modes:
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Auto mode – automatically adjusts purification levels based on detected air quality
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Fan mode – delivers a cooling airflow effect
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Diffused mode – purifies air without direct airflow
It also features wide-angle oscillation, remote control and compatibility with app and voice control systems for convenient operation.
Features:
- Designed for large spaces with long-range airflow projection
- HEPA H13 + K-Carbon filtration system
- Permanent catalytic filter for formaldehyde destruction
- Advanced multi-sensor air quality monitoring
- Ultra-quiet performance
- App, remote and voice control compatibility
Suitable For:
- Large living rooms and open-plan spaces
- Removing dust, allergens, gases and odors
- Reducing formaldehyde indoors
- Continuous quiet air purification
