Air purifiers.

The Dyson air purifier redefines air purification standards by going beyond conventional air purifiers to solve problems that others have ignored.

Sensors
In real life, the only way to truly know how well an air purifier is working is to monitor the air quality. Dyson Pure Cool™ air purifiers have a unique algorithm that processes the input from three on-product sensors. Each sensor constantly monitors the air for particles, gases, temperature and humidity. When pollutants are detected, the air purifier (in auto mode) automatically reacts and adjusts the purifying settings to counteract the pollution and maintain the target air quality inside a room. The Dyson air purifier reports real time air quality data (room air quality graph, PM 2.5, PM 10, NO₂, VOC) via the LCD screen on the air purifier.

Filtration
The 360° sealed filter is engineered to draw in air from all around the circumference of the air purifier. This allows for free positioning of the air purifier in the room. The filtration system is made up of two separate filters – a particulate high grade HEPA filter (H13) and an activated carbon filter.

By sealing the filters within the air purifier, air can only pass through the filters, not around them, so more particles can be captured in the first pass. This allows Dyson purifiers to capture 99.95% of particles as small as 0.1 microns².

Air Multiplier™ Technology
Dyson purifiers use Air Multiplier™ technology to project purified air, while oscillating 350° for even coverage across the whole room¹. The oscillation angle can also be customised via the Dyson Link app or onboard LCD screen to switch between personal cooling or around the whole room. Another benefit of this is that users can purify the whole room without having to reposition their air purifier.

Heating functionality
The Dyson Pure Hot+Cool™ air purifier can be used all year round - it is able to purify continuously and heat your room at the same time during winters.

Self-regulating ceramic plates are positioned at the front of the amp, to heat the air as it leaves the air purifier. As the plates heat up, they conduct less electricity to help ensure they don’t overheat. With thermostat control, once your target temperature is reached, the air purifier automatically stops heating, which saves energy. If the temperature starts to drop, it reactivates to maintain it.

<sup>1. Tested to Dyson internal test method TM-003711 in a 27m2 room. 'Harmful' / 'Ultrafine' pollutants refers to airborne particles as small as 0.1 microns (tested to EN1822).
2. Tested to GB/T18801 (formaldehyde, benzene). Gaseous capture rates vary. Tested to EN1822 - airborne particles as small as 0.1 microns.</sup>

Some manufacturers of conventional air purifiers gauge the performance of their products using a laboratory test method called ‘Clean Air Delivery Rate,’ (CADR). When Dyson engineers looked further into the CADR test, they noticed it had several shortcomings, including testing in a small test chamber with a built-in fan to circulate the air and only one sensor to measure air quality. Also, CADR doesn’t take into account ultrafine particles as small as 0.1 microns passing through filters that aren’t sealed – this means that these pollutants can pass through a room air purifier many times without being captured.

Our observations in the field show that most people sit away from their air purifiers and don’t use mixing fans. So, to replicate these conditions, Dyson engineers tested conventional air purifiers in larger rooms with no mixing fan and used multiple sensors to measure the air quality across the whole room¹. We found that some air purifiers are only able to purify the air around the air purifier, creating a “clean air bubble”, while areas in a room further away from the air purifier can remain polluted. Only a purifier with fan functionality is capable of properly circulating the air to achieve whole room air purification¹. Dyson air purifiers combine Air Multiplier™ technology with 350° oscillation to achieve this. Our sensors are able to detect pollution events automatically. Lastly, the filters are vacuum sealed within the machine so that 99.95% of particles as small as 0.1 microns are captured on the first pass². All this means that the Dyson Pure Cool™ air purifier automatically cleans a whole room properly¹.

<sup>1. Tested to Dyson internal test method TM-003711 in a 27m2 room. 'Harmful' / 'Ultrafine' pollutants refers to airborne particles as small as 0.1 microns (tested to EN1822).
2. Tested to GB/T18801 (formaldehyde, benzene). Gaseous capture rates vary. Tested to EN1822 - airborne particles as small as 0.1 microns.</sup>

Particles are tiny fragments such as pollen and smoke that are lightweight enough to be airborne. Dyson air purifiers have the ability to detect such particulates in the air using its sensors. It captures these by trapping them in the fibres of its particulate H-13 HEPA filter. VOCs (Volatile Organic Compounds) are gaseous chemical compounds, both man-made and naturally occurring, including fumes and toxins. A range of VOCs are neutralised when they react with the layer of activated carbon filter.

This table details some of the particulates and gases that can be found in the air in our homes, and their approximate sizes:

The Dyson range of air purifiers operate at a variable wattage reading depending on the fan speed for circulation - ranging from 7 to 40 watts. (On purification mode)

Additionally, the air purifier has Auto mode. When set to Auto mode, the air purifier intelligently selects the most efficient airflow to combat indoor air pollution. When it reaches the target air quality, the air purifier will slowly reduce the airflow (instead of simply switching off) to maintain this target level. It then switches to idle mode, where the air purifier is still monitoring and reporting, but using minimal airflow.

The area covered by an air purifier can vary. The bigger the room, the longer an air purifier takes to purify the air. The Dyson Pure Cool™ air purifier, purifies a room and automatically detects when the room is clean. It will also detect when pollution events begin using a Dyson development algorithm to keep indoor air quality in check.

An air purifier is designed to efficiently work in a restricted space, hence it would work efficiently for a single room. The Dyson air purifiers are light and can be easily moved within rooms, if needed.

There is no restricted time to run an air purifier in your room. For a better purification you can run it all throughout the day. The Dyson air purifiers have an auto mode that will keep sensing the pollutants and increase/decrease its ability to purify. This will reduce your energy consumption and keep your house purified all throughout the day.

The Dyson air purifiers are acoustically designed to follow the updated GBT standard. The machine is therefore engineered to be as quiet as possible, with streamlined air channels for reduced airflow turbulence. It has a high sound quality that produces a comfortable tone for the human ear without a compromise of performance. At minimum setting, the noise is almost inaudible to the human ear. All Dyson air purifiers are also ‘Quietmark’ certified.

The filters for your Dyson air purifier would need to be changed after 12 months, based on 12 hours use a day⁵
The price of these filters varies between 2,490 for a single HEPA / Activated carbon (used in TP/DP/HP04) filter to 2,690 for a combi filter (used in TP03/BP01)

^{5. Based on 12 hours use per day. Filter life will vary according to pollution levels.}

Dyson air purifiers are designed to work in real homes – not just test chambers. That’s why Dyson engineers go far beyond the traditional tests that other manufacturers use. Dyson air purifiers are tested for the capture and remove of harmful ultrafine particles and gases within the home, as well as even purification across the whole room¹. In order for Dyson to confidently claim that the Dyson Pure Cool™ air purifier automatically cleans a family room properly, the machine was put through a suite of rigorous accelerated real-life tests to simulate use:

Filter Efficiency test (EN1822) – Dust, smoke, and other harmful particles are drawn into the filter to test the efficiency of particulate removal. One measurement of the particles is taken ‘upstream’, before they pass through the filter. A second measurement is taken ‘downstream’, after they have passed through the filter and exited the aperture. From these results, a removal figure can be obtained for certain particles – e.g. 99.95% of particles as small as 0.1 microns². Full Grid Flow – Measures volume, velocity and direction of air projection from the air purifier. Clean Level (POLAR) test – Measures the level of clean across a room (27m²) using PM 2.5 particles; measured using nine sensors positioned at different heights and in the corners of the room. Gaseous capture – The air purifier was tested to two different standards at external test labs: JEM 1467 (Japan standard) and GB/T18801. The JEM 1467 measures the ability to capture Acetic Acid and Acetaldehyde. The GB/T18801 standard measures the ability to capture Formaldehyde and Benzene, with this being adapted for NO₂. Sensing – Real world evaluation of air purifier sensor accuracy. Acoustics – Measures sound quality and power at all air purifier speed levels.

<sup>1. Tested to Dyson internal test method TM-003711 in a 27m2 room. 'Harmful' / 'Ultrafine' pollutants refers to airborne particles as small as 0.1 microns (tested to EN1822).
2. Tested to GB/T18801 (formaldehyde, benzene). Gaseous capture rates vary. Tested to EN1822 - airborne particles as small as 0.1 microns.</sup>