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Dyson purifier humidify+cool formaldehyde logo
Pollutants captured by the Dyson purifier humidifier fan and purified air expelled

Automatically purifies and hygienically humidifies for a healthier environment. Even detects and destroys formaldehyde.¹

Detects and destroys formaldehyde found in household items¹

Automatically senses, captures and traps pollutants

Fully sealed to HEPA H13 standard⁴

Projects purified humidified air throughout the room³

A hassle-free deep clean cycle

Video Transcript

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Dyson Purifier Humidify+Cool Formaldehyde™ PH04 (Nickel/Gold)

Overall rating

53% of reviewers would recommend to a friend.

I didn't realize how bad my air quality was!


I received my Air Purifier/Humidifier and immediately set it up. As with all Dyson products, set up was a breeze and the instructions were very clear. Once it was set up and I read through the manual to understand what the data I was looking at was on the display, it hit me - WOW my air quality was terrible in my living room! Having 2 dogs and 2 cats running around the house obviously doesn't help, but I can comfortably say that was no match for Dyson's air purification technology. By afternoon the next day, the screen on my purifier was showing all green and gave me the peace of mind to know that my family and I were getting clean air pumped into the main room of the house. Thank you Dyson for making yet another great product that I will enjoy for years to come!

Dyson purifier humidify + cool in home

Improve the air quality inside your home

Improve the air quality inside your home The air in an average home can be up to five times more polluted than the air outside.⁷ On top of this, heating and air conditioning can dry out the air. Fortunately, we have a solution to both.

Frequently asked questions

How does a purifier humidifier work?

The Dyson purifier humidifier senses and captures pollutants and measures the current level of moisture in the air - automatically. Then, it projects purified and hygienically humidified air around the room³, cooling you when needed.

Should I use a purifier humidifier all year round?

Yes, to get the best results, a purifier humidifer should be used all year round. To help combat dry air from central heating and air conditioning, and capture pollutants such as dust, smoke, odours and pet allergens. With pollen more present in summer, and pollutants such as formaldehyde emiting from furniture and flooring, there is benefit to using all year round. You can also use the purifier humidifier when sleeping, on night mode.

What is new about the Dyson purifier humidifier and how is it different to other humidifiers?

We've re-engineered our latest purifier humidifier to be fully sealed to HEPA H13 standard.⁴ That, in addition to our advanced filtration, hygienic humidification, and hassle-free Deep clean cycle, differentiate this product from other humidifiers.

What is different about the Dyson Formaldehyde range?

The Dyson Purifier Humidify+Cool Formaldehyde 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 common sources of it?

Formaldehyde is a polluting gas formed of carbon, hydrogen and oxygen that is commonly found in homes. Common sources of formaldehyde could be: 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.

Do Dyson purifiers capture wildfire smoke?

Dyson purifiers capture wildfire smoke.9

Purified air reaching every corner of family home

Powerful circulation to purify and humidify the whole room

Dyson purifiers draw pollutants, such as pollen, dust, allergens and smoke, from every corner of the room and Air Multiplier™ technology projects purified, humidified air throughout the room.³

Dyson purifiers are tested beyond the industry standard. For real living spaces.

We test our purifier humidifiers in a room size of 81m³, with nine sensors that continuously measure air quality. Some other manufacturers use a small 28.5m³ chamber, with only one sensor and a fan to boost circulation.

Video Transcript

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  • CADR test chamber

    Industry-standard test chamber – only 28.5m³

  • Polar test chamber

    Dyson POLAR test chamber - 81m³

Dyson air purifier HEPA, carbon and catalytic filters

Destroys formaldehyde, continuously.¹ Captures pollutants and allergens.

A HEPA filter captures 99.97% of particles 0.3 microns in size, a filter removes gases and odors, and a catalytic filter destroys formaldehyde.¹

Formaldehyde molecules entering air purifier filter

Destroys formaldehyde released from household items¹

Dyson's unique catalytic filter continuously traps and converts formaldehyde into water and CO₂, in billions of catalytic tunnels.

Video Transcript

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Common household pollutants

  • Carpets, rugs and flooring


  • Household fumes and cooking


  • Cleaning products and candles

    Benzene and VOCs

  • Gas stoves and car exhausts

    Nitrogen Dioxide

  • Common allergens - pet dander, pollen, and dust


  • Industrial emissions and smoke


  • Ultrafine particles


Air purifier humidifier projecting airflow in family room

Fully sealed to HEPA H13 standard

To prevent pollutants leaking back into the air, it's not just the filter that's sealed to HEPA H13 standard, it's the whole purifier humidifier.⁴ So what goes inside, stays inside.

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Air purifier humidifier projecting airflow in bedroom

To humidify your environment, hygienically

Central heating and air conditioning units can contribute to dry air developing in the home, which can cause dehydration. The Dyson purifying humidifying fan automatically maintains the target level of moisture in your air with an invisible stream of evaporated water, and no mist – for a more comfortable environment.

Cutaway image of the inside of a purifier and the Deep clean cycle in action.

Hassle-free Deep clean cycle, now made easier with our citric acid cleaning kit

Use your machine's Deep clean cycle with our specialized Cleaning Kit to remove mineral build-up.

Featured air treatment articles

  • Dyson PH04 and Nastional Psoriasis Foundation logo

    Psoriasis and air treatment

    Recently, the National Psoriasis Foundation certified its first humidifier purifier: the Dyson Pure Humidify+Cool three-in-one purifier, humidifier, and fan. This is the first machine of its kind to receive this recognition.

  • Melody Cheng wearing the Dyson Air Quality backpack.

    How to manage dry skin during the winter

    Dyson Associate Principal Scientist Naomi Simpson and celebrity aesthetician Shani Darden weigh in on how to mitigate the effects of dry weather by using the Dyson Pure Humidify+Cool and other unique skin care products.

MyDyson logo
Phone screen showing video on how to get started with a new purifier.

Expert guides on the MyDyson™ app

From quick-start and how-to guides to understanding different modes and screens. All tailored to you and your machines.

The MyDysonTM app is only compatible with select Dyson products. For a list of compatible products, please click here.

Frequently asked questions

Where should I place the purifier humidifier in my room?

Your Dyson Pure Humidify+Cool™ is engineered to purify and humidify single rooms, so you should use it where you spend the majority of your time at home. When placing the machine, make sure there's at least a few feet of clearance on all sides, so that the air can circulate effectively. Close doors and windows and place away from air vents. 

Can I switch off humidification?

Yes. The machine works as a purifier humidifier, or just a purifying fan.

How often should I run a Deep clean cycle?

This depends on the water hardness where you live. The machine prompts you to run the cycle once a month in hard water areas. It prompts you less often in softer water areas. You can select your water hardness with the Dyson Link app. Running a Deep clean cycle helps to eliminate odours that occur through poor maintenance.

Choose your model

Latest technology

Dyson Purifier Humidify+Cool Formaldehyde™ PH04 (White/Gold)

Hygienically humidifies.

Detects and destroys formaldehyde.¹ Automatically senses, captures, and traps pollutants.

Control with remote, MyDyson app, voice services.⁵

Color:  White / Gold

What's included

See all Hide Click to learn more
  • Remote control

    Curved and magnetized to store neatly on the machine.

  • Dyson Genuine filter

    Filter for your Dyson Purifier


See details
Latest technology

Dyson Purifier Humidify+Cool Formaldehyde™ PH04 (Nickel/Gold)

Hygienically humidifies.

Detects and destroys formaldehyde.¹ Automatically senses, captures, and traps pollutants.

Control with remote, MyDyson app, voice services.⁵

Color:  Nickel/Gold

What's included

See all Hide Click to learn more
  • Remote control

    Curved and magnetized to store neatly on the machine.

  • Dyson Genuine filter

    Filter for your Dyson Purifier


See details

¹Third party full machine testing based on GB/T 18801-2015. Results may vary in practice.

²Tested to DTM-004533.

³Tested for purification coverage in an 81m³ chamber. Tested for humidification coverage in a 41m³ chamber.

Tested with particle challenge per EN1822 in a chamber per ASTMF3150. Tested at maximum fan speed.

Requires device to run app, 2.4GHz or 5GHz Wi-Fi connection or mobile data, and Bluetooth® 4.0 support. For app compatibility, please search for ‘Dyson Link’ on the iOS App Store or the Google Play Store. Standard data and messaging rates may apply. Voice control requires a compatible voice service.

Based on fan speed 1.

⁷US Environmental Protection Agency, The Total Exposure Assessment Methodology Study, 1987.

⁸PH03 is a humidifier and fan, not an air conditioning unit.

9Based on capture of particles, ammonia, benzene, and acetic acid.


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