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Welcome to your new Dyson HEPA Big+Quiet Formaldehyde purifier

Get ready for a cleaner, more comfortable environment.

Let's get started in three easy steps:
1. Set up
2. Register your machine
3. Understanding the LCD screen

Dyson hepa big and quiet formaldehyde shown in both full view and close-up.

Get started

Set up your purifier

Our quick-start video shows how to assemble your purifier, so it's ready to use.

Watch how to set up your purifier


Register your new purifier in less than 60 seconds. Next, enjoy instant access to tailored support and everything you need to get the most out of your purifier.

  • Black and white icon of guarantee with number 2 on it.

    Access your 2-year guarantee

  • Black and white icon of telephone.

    Expert support 7 days a week

  • Black and white icon of a nut and bolt.

    Hassle-free repair or replacement

  • Black and white icon of hands holding a circle with a tick in the middle.

    Tailored tips and advice

Understanding the LCD screen

Find out everything there is to know about your Dyson HEPA Big+Quiet Formaldehyde purifier – from understanding the LCD screen to replacing the filter - with our helpful tips, how-to videos, FAQs and more.

Dyson hepa big + quiet formaldehyde

Now you're up and running, we want to help you understand your machine. The LCD screen displays the power mode setting and CO₂ level in the room – in real time.

  • LCD screen showing low CO₂

    Low CO₂

    CO₂ is at a safe level.

  • LCD screen showing medium CO₂

    Medium CO₂

    CO₂ is building up. It may be advisable to take preventative measures such as opening a door or window.

  • LCD screen showing high CO₂

    High CO₂

    CO₂ has built up to a level of concern. It's advisable to take action, like opening a door or window.

User manual

User manual

Download your Dyson HEPA Big+Formaldehyde user manual

User manual


For business owner support

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