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Dyson Big+Quiet Formaldehyde logo

Dyson's quietest, most powerful air purifier yet.

Purifies rooms up to 100m², evenly.1
Engineered for professional environments such as offices, classrooms and hotels.

The Dyson HEPA Big+Quiet Formaldehyde.
The Dyson HEPA Big+Quiet Formaldehyde purifying an office space.



  • Fixed angle

    Cord length
    Carbon filter life
    8,760 hrs
    Standby power consumption
    Low airflow setting
    50 ltrs/second
    Room coverage
    Quiet setting

  • High airflow setting
    90 ltrs/second

    Maximum setting
    HEPA filter life
    21,900 hrs


It's our business to understand air pollution, so yours doesn't suffer

Workspaces can harbour pollutants such as viruses, bacteria, Volatile Organic Compounds (VOCs), pollen and formaldehyde. Everyday items such as cleaning products and printers, furniture and flooring, can release potentially harmful microscopic particles, and remain in the air for many years.3

A large living space and the sources of various pollutants.


Dyson purifiers remove these common pollutants from commercial environments

  • Paint, varnishes and printers


  • Traffic, building materials and furniture

    Benzene and VOCs

  • Fumes and cooking


  • Pollen, dust and allergens


  • Bacteria and mould


  • Ultrafine particles


Engineered to purify large spaces

Fully-sealed to HEPA H13 standard to capture 99.95% of pollutants as small as 0.1 microns.4 Purifying rooms up to 100m², evenly.1

A large living space with the Dyson HEPA Big+Quiet Formaldehyde purifying the room.


Senses, captures and destroys

  • The conic amplifier top section of the purifier.

    Senses and reports CO2 levels

    1.44 inch LCD screen displays carbon dioxide readings and airflow mode – senses and reports air quality levels in real time.

  • The filtration system within the Dyson purifier.

    Whole-machine HEPA 13 filtration2

    Three phases of purification draw pollutants in from all directions. And the whole machine is fully sealed to HEPA H13 standard – so what goes in, stays in.

  • A formaldehyde molecule.

    Destroys formaldehyde, continuously3

    The solid-state formaldehyde sensor works simultaneously with a selective catalytic oxidisation filter, to destroy formaldehyde molecules 500x smaller than 0.1 microns.


Additional features

  • HEPA filter

    The HEPA filters contain 21 metres of borosilicate microfibres, pleated over 450 times, and lasts 21,900 hours.

  • Activated carbon filter

    430,000m² of activated carbon captures microscopic particles, and lasts 8,760 hours.

  • Single button operation

    Two airflow speeds to increase or decrease airflow when needed.

Get in touch to discuss the right purifier for your business

Every business is unique. Learn more about the range and what purifier is most suitable for your business.

The range of Dyson purifiers.

Why choose Dyson for business


Frequently asked questions

Our latest purifier is acoustically engineered to operate quietly – even at its highest power setting. So it reduces your exposure to pollution, without disturbing you at the office or in the classroom. It records just 55dBA of sound power at full speed.

In Dyson’s latest purifiers, it’s not just the filter that meets HEPA H13 standard, it’s the whole purifier. So they don’t just capture pollutants, they prevent them from leaking back into the air you breathe. High-pressure seals at 24 critical points, combined with Dyson’s fully-sealed filtration system, means our whole purifier meets HEPA H13 standard. So what goes inside, stays inside.

Some manufacturers publish dB readings based on Sound Pressure levels, which can be easily manipulated by changes in the environment. They might also be tested at low fan speeds which can limit purification performance.

At Dyson we measure and publish Sound Power levels dB(A) – the pure reading taken directly from the machine – at maximum fan speed, where purification is at its optimum.

Increased CO2 levels can impact cognitive function. Our latest purifier senses and reports CO2 levels and notifies when they exceed recommended levels, alerting on the LCD screen when to ventilate.


Useful documents