Dyson
Dyson Purifier Big+Quiet Formaldehyde BP04 (Prussian Blue/Gold)
Best air purifier for large homes needing powerful, quiet pollutant removal.
Experience superior air quality with the Dyson Purifier Big+Quiet Formaldehyde BP04. Engineered for large spaces, it powerfully projects purified air over 32 feet. Its advanced three-stage filtration system, including HEPA H13, K-Carbon, and Selective Catalytic Oxidization, effectively neutralizes formaldehyde and captures 99.97% of microscopic particles. Enjoy cooling comfort and real-time CO₂ level alerts for a healthier environment. Seamlessly control your air quality via the MyDyson app or voice commands.
$1199.99
Owner Satisfaction
4.5
/ 5
Category Rank
215
/ 787
#215 in Power Control Units
Price vs Category Average
+30%
Above average
Filtration
13
/ HEPA H-grade, K-Carbon, Selective Catalytic Oxidization
Who it's for
- Remote workers needing quiet environments for deep focus
- Homeowners with expansive open-concept living areas
- Health-conscious residents concerned about long-term indoor air pollutants
Who should skip it
- Budget-conscious shoppers seeking affordable air purification solutions
- Owners looking to minimize ongoing maintenance and replacement expenses
- Apartment dwellers with limited floor space for bulky appliances
Performance breakdown
Large space purification
Engineered to circulate clean air across massive floor plans with ease.
Formaldehyde destruction
Continuous catalytic oxidation effectively neutralizes harmful chemicals in your home.
Filtration precision
HEPA H13-grade system captures microscopic particles down to 0.1 microns.
Acoustic performance
Remarkably quiet operation even when running at higher fan speeds.
Smart connectivity
MyDyson app integration provides seamless control and real-time air quality insights.
Air projection range
Powerful airflow reaches over 32 feet to ensure consistent room circulation.
Key Specs
Filtration
HEPA H13-grade, K-Carbon, Selective Catalytic Oxidization
Coverage Area
Up to 4000 sq ft
Particle Capture
99.97% of particles as small as 0.1 microns
Dimensions
32.68in (H) x 17.09in (W) x 16.34in (D)
Weight
26.24 lbs
Fan Speeds
10 settings
Oscillation/Angle
50 degrees
Warranty
2-Year Limited Warranty
Features
- Purifies large spaces and projects air over 32 feet
- Cools you in warmer weather
- Destroys formaldehyde continuously
- Captures three times more NO₂ pollutant
- Alerts for high CO₂ levels
- Comprehensive three-stage filtration system
- App control and voice assistant compatibility
- Quiet operation with 10 speed settings
What customers say
Users highly regard the Dyson Purifier Big+Quiet BP04 for its exceptional performance in large spaces. The unit successfully balances powerful air movement with remarkably quiet operation, validating its name. A key selling point is the specialized formaldehyde sensing and destruction technology, which provides significant reassurance to health-focused buyers. Many appreciate the attractive Prussian Blue/Gold design, viewing it as premium functional decor. While performance and quality are benchmark setting, the primary drawback cited is the high initial cost and ongoing expense of proprietary filters. Despite the premium price, most feel the specialized capability justifies the investment for superior air purification.
Know before you buy
This model is engineered for large rooms and open-concept areas, providing coverage for spaces up to 4,000 square feet. It is capable of projecting purified air over 32 feet to ensure circulation throughout the entire room.
Yes. It features a Selective Catalytic Oxidization filter that continuously breaks down formaldehyde molecules into water and CO₂. Unlike standard carbon filters that can become saturated, this catalytic filter does not need to be replaced.
Yes, the unit functions as both a purifier and a cooling fan. It features 10 adjustable speed settings, allowing you to choose between gentle air circulation or a more powerful cooling breeze.
The purifier includes an integrated sensor that monitors CO₂ levels in real-time. It will provide alerts through the MyDyson app if levels become elevated, helping you determine when it is time to open a window or improve ventilation in your space.
The Big+Quiet is specifically engineered for acoustic performance, utilizing a re-engineered motor bucket to minimize noise. While it is powerful enough to reach 32 feet, it remains relatively quiet even at higher settings compared to traditional industrial-style air purifiers.
The system uses a three-stage filtration process consisting of a HEPA H13-grade filter and a K-Carbon filter, both of which will eventually require replacement based on usage. The Selective Catalytic Oxidization filter is designed to be permanent and does not require replacement.
Yes, the unit is compatible with voice commands via Amazon Alexa and Google Assistant for hands-free control. Additionally, the device comes with a remote control for manual adjustments if you prefer not to use the app.
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$1200