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Dyson Purifier Hot+Cool Formaldehyde logo
 Dyson Purifier hot+cool formaldehyde in a kitchen
 Dyson Purifier cool formaldehyde in a kitchen

Re-engineered to deliver 50% cleaner air*

Automatically senses, captures, and traps pollutants

Precisely detects and destroys formaldehyde¹

Fully sealed to HEPA H13 standard.³ So what goes inside, stays inside.

Purifies, heats the whole room², and cools you

Dyson Purifier Hot+Cool Formaldehyde™ HP09 (White/Gold)

Overall rating

56% of reviewers would recommend to a friend.

Top notch purifier


Been a big fan of Dyson product for many years... and I would say this new Dyson Purifier does not disappoint. It has amazing features, it blows cool and fresh air I'm using it in 4 or 5 and it's perfect already, I can't imagine using it on the highest level 10. The remote is top both plus the Dyson app. You can actually use it with Alexa or Siri For voice commands.

Dyson purifier hot+cool formaldehyde purifying a large living space

Powerful circulation to purify the whole room

Only Dyson purifiers have Air Multiplier™ technology to draw in distant pollutants and project purified air throughout the room.²

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  • Graphic comparison of CADR test v Dyson test
  • Graphic comparison of CADR test v Dyson test

Pollutant sources in a living space and kitchen

Poor air quality isn't just a problem outside.
It's a problem inside too.

From pets and flowers, to sprays and stoves, our homes can trap pollutants in the air. That's why Dyson purifiers automatically sense and remove them.

Internal sensing technology and LCD screen showing formaldehyde detected

Senses and reports, automatically

Four sensors, including a solid-state formaldehyde sensor, interact with our unique algorithm to precisely diagnose, display and react to your air quality.

Graphic of Dyson filtration system
Graphic of Dyson filtration system

Captures and destroys with advanced HEPA filtration

The HEPA filter captures gases and 99.97% of particles as small as 0.3 microns. Our catalytic filter continuously destroys formaldehyde.

Air purifier catalytic tunnel

Destroys formaldehyde¹ in billions of catalytic tunnels

Dyson's unique catalytic filter continuously traps and converts formaldehyde into water and CO₂. And it self-regenerates, so it never needs replacing.¹

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Fully sealed air purifier

Fully sealed to HEPA H13 standard

To prevent pollutants from leaking back into the air, it's not just the filter that's sealed to HEPA H13 standard, it's the whole purifier.³ So what goes inside, stays inside.

  • Image showing powerful, cooling airflow
  • Someone changing their filter
  • Purified air exiting the back of the purifier
  • Someone changing their filter
  • Dyson purifier in a dark bedroom with someone sleeping peacefully

  • Dyson Tower Purifier in room being re-painted

    Cleaner air, cleaner home: how to maintain a healthier space during home renovations

    Moving and home makeovers involve new furniture and paint, which could add to the levels of a potentially harmful pollutant called formaldehyde in the home. Here's how to maintain a healthier space during moves and renovations.

  • Indoor pollutants in a bedroom

    Formaldehyde: the invisible indoor pollutant

    Although the smell of new paint might fade over time, the emission of potentially harmful gases, such as formaldehyde, can persist. Pollutants like these can continuously ‘off-gas’ for a number of years – but what exactly is formaldehyde and why is it in our homes?


Frequently asked questions

What's new about the Dyson Purifier range and how is it different to other purifiers?

Dyson engineers are perfectionists. Channeling our relentless dissatisfaction, we have re-engineered our latest purifiers to be fully sealed to HEPA H13 standard.³  Two phases of purification sit within a fully-sealed filtration and airflow system to trap pollutants inside, preventing them from leaking back into the air you breathe. 

What is different about the Dyson Purifier Formaldehyde range?

The Dyson Purifier Formaldehyde range has all of the capabilities found in our advanced purification products, but goes a step further to detect and destroy formaldehyde.¹ An added solid-state sensor precisely detects formaldehyde, while our catalytic filter breaks it down into two safer molecules – carbon dioxide and water.

What is formaldehyde and what are its common sources?

Formaldehyde is a polluting gas formed of carbon, hydrogen, and oxygen that is commonly found in homes. Sources of formaldehyde in your home could include paint and varnishes, air fresheners, mattresses, furniture, household cleaners, carpets, particleboard and plywood, electronics, dryer sheets, nail polish remover, moth balls, toys, fireplaces, and wood burning stoves.

What is HEPA H13?

HEPA grades refer to filter efficiency at a certain particle size. HEPA H13 is a filter with a 99.95% removal efficiency of particles down to 0.1 microns per liter of air. Dyson filters also capture 99.97% of particles down to 0.3 microns in size including common pollutants such as allergens, bacteria, viruses, pollen, and mold spores.

How often should I replace my filter?

We recommend replacing the HEPA+Carbon filter roughly every 12 months, depending on how often you use it. That’s because over time filters can become clogged with pollutants and even let unpleasant odors back into the room. The machine will alert you when it’s time to change filters. A filter life reading can be found on the LCD screen and via the Dyson Link app.⁵ The catalytic filter never needs replacing.

Why can’t I control the temperature or activate heating via the MyDyson app?

This machine is compliant with safety standard UL 1278, as required by the US government. For this reason, heating and temperature control are not available in the Dyson Link app. Please use your machine’s remote control instead.

Do Dyson purifiers capture wildfire smoke?

Dyson purifiers capture wildfire smoke.9

  • Replacement filter

    Replacement filter