Innovation | August 8, 2023
Dyson doubles down on indoor air quality: Introducing the Dyson Purifier Big+Quiet air purifier range, reaching up to 32 feet to purify large rooms¹, quietly.
- Dyson’s quietest yet most powerful purifier: The Dyson Purifier Big+Quiet Formaldehyde is born of Dyson’s longstanding expertise in airflow, acoustics, filtration and compressors.
- Cone Aerodynamics: New airflow delivery system offers more than double the airflow of previous models, up to 23 gallons of airflow per second3 of purified air over 32 feet. New CO2 sensor indicates when to ventilate4.
- Re-engineered motor bucket: Ensures quiet operation – meticulous re-engineering incorporating ingenious acoustic solutions including a Helmholtz silencer and labyrinth seal.
- Improved three-phase filtration system: Capturing up to 99.97% of fine particles5, removing 3x more NO2 compared to previous Dyson carbon filter and permanently destroying formaldehyde6, with two and a half years7 of HEPA filter life.
Dyson unveils its latest air purification technology, designed to purify the air in large spaces. Controlling the air we breathe is crucial to our health and wellbeing. Outdoor pollutants can enter our indoor spaces and react with indoor pollutants, creating a complex mixture of dirty air – at times, causing indoor air to be more polluted than the outdoor air8.
The Dyson Purifier Big+Quiet Formaldehyde uses Cone Aerodynamics to deliver 32 feet projection, a new K-Carbon filter for 3x better NO2 capture compared to previous Dyson carbon filter9 and introduces a CO2 sensor10 in to promote a clean and comfortable indoor environment. Alongside powerful projection, the Dyson Purifier Big+Quiet Formaldehyde is also engineered to operate quietly, producing just 56 decibels of noise - making it Dyson’s quietest yet most powerful purifier.
“Poor Indoor air quality is a much-ignored, growing issue. Our home environments can be filled with particle and gas pollution, be it pollen, pet dander, NO2, CO2, VOCs from cleaning products and more. Each of these particles can contribute to an unhealthy environment, causing potential health concerns. The Dyson Purifier Big+Quiet Formaldehyde is our first purifier specifically engineered to purify properly in spaces up to 1,000 square feet. It blends highly effective filtration and powerful projection, to automatically respond to imperceptible pollution events. With new Cone Aerodynamics to project purified air over 10 meters, the Dyson Purifier Big+Quiet Formaldehyde can reach every corner of your living space.” –Matt Jennings, Dyson Engineering Director – Environmental Care
New Cone Aerodynamics: 32 feet powerful projection
At Dyson, we are dedicated to solving problems that others ignore, and air purification is no different. The Dyson Purifier Big+Quiet Formaldehyde represents a step-change in air purification, as Dyson engineers address the problems with weak airflow projection in large rooms. Conventional large-format purifiers typically diffuse air upwards or have weak projection which reduces their ability to achieve a thorough large-room clean. To achieve better, they developed a new energy-efficient, low-pressure air delivery system: Cone Aerodynamics.
Cone Aerodynamics uses the Coanda effect to merge two streams of air over a smooth surface, resulting in a powerful and condensed jet of air that can be projected of more than 32 feet, with minimal noise. It delivers more than double the airflow of the previous generation Dyson Purifiers11. Powerful projection is critical to ensure that the machine effectively delivers clean air to every corner and displaces dirty air back towards the filter. The Dyson Purifier Big+Quiet Formaldehyde projects purified air at angles of 0o, 25o or 50o depending on user preference.
Dyson's commitment to airflow research led our engineers to spend over 3 years collecting 40 million data points to help them recreate a natural breeze at home. The sensation from seemingly randomized air movement has been scientifically proven to be more refreshing than a stationary jet of air, a phenomenon termed thermal alliesthesia. Dyson engineers used a 3-axis ultrasonic anemometer across 8 different locations to study the shape and frequency of gusts of wind, using this data to inform a unique Dyson software algorithm that controls a single jet of air to oscillate in an up-and-down motion that mimics natural breeze patterns.
Three-phases of fully sealed filtration
The Dyson Purifier Big+Quiet is engineered to clean the air continuously, even in large spaces. Some common sources of indoor air pollution include tobacco smoke, household cleaning products, building materials, and outdoor air pollution that enters the home. These sources can emit pollutants such as formaldehyde, VOCs, NO2 and ozone. The machine has improved filtration to capture these harmful pollutants12 - featuring a fully sealed filtration system to HEPA H-1313, ensuring purified air is projected back into the room and the pollutants stays in the filter. By scaling up all three filtration layers, and improving HEPA filter life by 5 times, Dyson engineers have taken filtration performance to the next level:
- The HEPA H13-grade particle filter is made of 21 meters of borosilicate microfibres pleated 459 times (making it 3.8x larger than predecessors and the equivalent area of 2 king-size beds or 127 pieces of A4 paper). It captures 99.97% of particle pollutants, including dust and allergens as small as 0.3 microns14, and lasts up to two and a half years15.
- The new K-Carbon filter combats NO2 specifically, which can be emitted from activities like cooking or entering the home from outdoor sources, like nearby road traffic. It also captures benzene and household odors. Enriched with potassium, this filter now captures three times more NO2 than its predecessor16.
- The Dyson Selective Catalytic Oxidation (SCO) filter is made up of billions of atom-sized tunnels which break down formaldehyde molecules into tiny amounts of water and CO2. It then re-generates with oxygen from the air to keep destroying formaldehyde continuously, without needing replacement17.
The World Health Organization has published indoor air quality guidance18 on exposures to formaldehyde as it is a known carcinogen that can be found in certain household and commercial products. Exposure to high levels of the gas can cause health problems such as respiratory issues. Modern, well-sealed spaces can exacerbate this problem by trapping pollutants inside. Formaldehyde, which is 500 times smaller than particles the size of 0.1 microns, is particularly challenging to trap and destroy.
Quiet event at full power
To be effective, many conventional large-format purifiers need to be used at their full speed, which often generates too much noise for users to tolerate. As such, many fail to be used to their full potential. Our in-house team of noise and vibration engineers re-engineered the motor bucket so the Dyson Purifier Big+Quiet Formaldehyde projects maximum airflow with minimum noise.
- Broadband Helmholtz silencer is a cavity shaped to capture sound waves of target frequencies. As sound waves are transmitted from the source (the compressor) along the airflow pathways, the Helmholtz silencer traps sound energy and dissipates low-frequency noise.
- A unique labyrinth seal controls air recirculation by extending the airflow pathway, reducing the amount of energy the air holds and reducing potentially noisy swirl in the recirculating air.
- By soft mounting the motor within the compressor, we were able to isolate motor vibrations from the machine at the source before they became amplified, minimizing the noise generated from vibrations
Sensing and monitoring
Most indoor pollutants can't be seen or smelled. The Dyson Purifier Big+Quiet Formaldehyde comes with a suite of integrated sensors monitoring particle, gas and formaldehyde levels, allowing owners to monitor indoor air quality through the live results on the LCD screen and in the MyDysonTM app19. The sensors are also embedded with a unique Dyson algorithm which cross-checks data every second, analyzing the air and automatically reacting to environmental changes to purify. The MyDysonTM app also acts as a remote control, even when you’re not at home, or can be used to schedule and monitor purification.
The Dyson Purifier Big+Quiet Formaldehyde incorporates a CO2 sensor, making it the first time Dyson has incorporated this feature in our purifiers. Higher CO2 levels indoors can impact our wellbeing but can also affect our cognitive abilities20. The CO2 sensor accurately reports when CO2 levels exceed recommended levels, altering you to ventilate your space. With the Dyson Purifier Big+Quiet, you can breathe cleaner air continuously, even in large spaces, and take control of your indoor air quality.
The industry standard test for purifiers, Clean Air Delivery Rate (CADR), is usually tested in a small test chamber of 12m2 with just one sensor and artificial air mixing. For our largest, quietest, and most powerful purifier to date, Dyson engineers constructed a 100m2 test chamber in Dyson’s Hullavington campus. The chamber is equipped with 36 sensors to measure the machine’s ability to thoroughly and evenly clean the equivalent of a large, open-plan living space. By implementing this rigorous testing method, Dyson can ensure that its purifier performs optimally in more real-world settings21, surpassing traditional testing methods to promote a healthier and comfortable home environment.
1 Projection measured by internal flow reach testing under maximum directional airflow. Performance in end-use conditions may vary.
2 Volumetric airflow in highest fan speed mode, measured in Dyson labs, compared to previous models.
3 Primary airflow achieved at projection angle of 50°.
4 CO2 sensor included with BP04 model only.
5 Particle challenge by DEHS oil specified in EN1822 within a chamber specified in ASTM F3150. Tested in Max Mode, for whole machine efficiency above 99.95%.
6 3x NO2 removal on BP04 model. Permanent formaldehyde destruction with BP03 and BP04 models measured with third party full machine testing based on GB/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved).
7 Based on 24 hours per day (continuous) use in highest fan speed.
9 3x NO2 removal on BP04 model. Permanent formaldehyde destruction with BP03 and BP04 models measured with third party full machine testing based on GB/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved).
10 CO2 sensor included with BP04 model only.
11 Volumetric airflow in highest fan speed mode, measured in Dyson labs, compared to previous models.
12 3x NO2 removal on BP04 model. Permanent formaldehyde destruction with BP03 and BP04 models measured with third party full machine testing based on GB/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved.
13 Particle challenge by DEHS oil specified in EN1822 within a chamber specified in ASTM F3150. Tested in Max Mode, for whole machine efficiency above 99.95%.
14 Particle challenge by DEHS oil specified in EN1822 within a chamber specified in ASTM F3150. Tested in Max Mode, for whole machine efficiency above 99.95%.
15 Based on 24 hours per day (continuous) use in highest fan speed.
16 3x NO2 removal on BP04 model. Permanent formaldehyde destruction with BP03 and BP04 models measured with third party full machine testing based on GB/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved.
17 3x NO2 removal on BP04 model. Permanent formaldehyde destruction with BP03 and BP04 models measured with third party full machine testing based on GB/T 18801-2022 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved.
18 World Health Organization (WHO) (2010) Formaldehyde. In: Selected pollutants. WHO Guidelines for Indoor Air Quality. WHO, Regional Office for Europe, Copenhagen, Denmark, pp 103-156. ISBN 978 92 890 02134
19 Requires device to run app, 2.4GHz or 5GHz Wi-Fi connection or mobile data, and Bluetooth 4.0 support. For app compatibility, please search for ‘Dyson Link’ on the iOS App Store or the Google Play Store. Standard data and messaging rates may apply.
20 Du, B., Tandoc, M.C., Mack, M.L., Siegel, J.A., (2020). Indoor CO2 concentrations and cognitive function: A critical review. Indoor Air. 30(6), 1067-1082. DOI: 10.1111/ina.12706
21 Tested for PM2.5 purification in a 1074ft2 (41.7ft x 25.8ft) room. Results may vary in practice.