Skip navigation
Thanks. We've saved your preferences.
You can update your contact preferences at any time in the Keep in touch section of Your Dyson. If you have a Your Dyson account, you can log in below to manage your contact options.
Winter Event Removes 99.95% of ultrafine particles³
Dyson purifier humidifier fan
In stock
original price:
Was £699.99
current price:
Save £150.00


    Apple Pay

    Dyson purifier humidifier fan

    Dyson Purifier Humidify+Cool Formaldehyde PH04

    Detects and destroys formaldehyde, continuously.¹

    Purifies and hygienically humidifies a whole room²

    Lifetime solid-state formaldehyde sensor

    Captures H1N1 virus⁴

    Buy direct from the people who made it

    Dyson Purifier Humidify+Cool™ PH04 Formaldehyde

    Overall rating

    63% of reviewers would recommend to a friend.

    Helpful tips about humidifying your air

    Dyson purifier humidifiers let you achieve your desired humidity either automatically or manually. In Auto mode, just set it and forget it. In manual mode, the LCD indicates if you need to increase airflow – which may help you reach your target quicker. And remember, keeping your machine away from drafts and turning down your home’s heating or AC units can also improve performance.


    • Airflow at max. setting

      253 l/s

    • Oscillation/Angle

      90 degrees

    • Cord length

      2 m

    • Number of speed settings


    • Total height

      923 mm

    • Air treatment type

      Purifier, fan and humidifier

    • Temperature settings


    • HEPA filter

      HEPA H13

    • Weight

      8.2 kg

    Dyson Purifier Humidify+Cool Formaldehyde
    • Height

      92.3 cm

    • Length

      31.2 cm

    • Width

      28 cm

    Frequently asked questions

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

    We've re-engineered our latest purifier humidifier to be fully sealed to HEPA H13 standard.⁶ With a hassle-free Deep clean cycle that  eliminates mineral build-up throughout your machine's water system.

    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.

    Where should I place the purifier humidifier in my room?

    Your Dyson Pure Humidify+Cool™ Formaldehyde 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 MyDyson™ app. Running a Deep clean cycle helps to eliminate odours that occur through poor maintenance.