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Filter technology.

Airflow diagram from Dyson Pure Cool™ purifying fan

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360° Sealed filtration – removes gases and particulates

The fully-sealed filter system combines an activated carbon filter to remove gases, and a Glass HEPA filter that captures 99.95% of microscopic allergens and pollutants as small as 0.1 microns.1

Exploded image of Dyson HEPA filter

Glass HEPA filter.

9 metres of borosilicate microfibres, pleated over 238 times, to capture 99.95% of harmful ultrafine particles.¹

Close-up of borosilicate microfibres in HEPA filter

Activated Carbon filter.

Tris impregnated carbon granules capture gases such as formaldehyde, benzene and nitrogen dioxide.¹

Close-up of activated carbon filter

Pollutants include:

  • Pollen and allergens diagram

    PM 10

    Pollen and allergens

  • Bacteria and mold diagram

    PM 5.0

    Bacteria and mould

  • PM2.5 diagram

    PM 2.5

    Industrial emissions

  • PM0.1 diagram

    PM 0.1

    Ultrafine particles

  • Formaldehyde diagram


    Carpets, rugs and flooring

  • Odours diagram


    Household fumes and cooking

  • Benzene and VOCs diagram

    Benzene and VOCs

    Cleaning products
    and scented candles

  • Nitrogen Dioxide diagram

    Nitrogen Dioxide

    Gas stoves and car exhausts

Using a unique algorithm, the Dyson Pure Cool™ air purifier processes the input from three sensors to continually monitor the room air quality.

It uses this information to activate the machine and keep room pollution levels low.

Particulate sensor
Uses laser measurement for constant particulate concentration analysis.

Gas sensor
Detects Volatile Organic Compounds (VOCs) and oxidising gases such as NO2.

Humidity and temperature sensor
Constantly monitors the relative humidity and temperature levels within the room.

Close-up of inner workings of the Dyson Pure Cool™ purifying fan

Powerful Air Multiplier™ technology.

Air Multiplier™ technology delivers over 290 litres per second of smooth, yet powerful airflow – circulating purified air throughout the whole room.²

Demonstration of Air Multiplier™ technology

Two airflow modes.

An air valve mechanism is driven by a brushless stepper motor, to allow remote actuation and switching between Diffused mode and Fan mode. The stepper motor drives a pinion gear, which turns a rotational baffle driver around the arc of the amplifier. Angled slots in the baffle driver move the baffle forwards and backwards.

Close-up of air valve mechanism

Forward projection

The baffle stays in place to deliver a forward powerful stream of purified air.

Demonstration of the baffle

Diffused projection

The baffle moves to block the front aperture and diverts air through the rear of the annular at a 45° angle, creating a more diffused airflow. This uses less energy and is quieter because the aperture is wider. Purification effectiveness is still maintained, without the 'draught.'

Demonstration of the baffle


The Dyson Link app

Close-up of Dyson Link app

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1Gaseous capture tested to JEM 1467 (acetic acid, acetaldehyde, ammonia) and GB/T18801 (formaldehyde, benzene). Gaseous capture rates vary. Tested to EN1822 - airborne particles as small as 0.1 microns.
2In max setting. 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).