6 photos
Dyson Purifier Hot+Cool Formaldehyde

Dyson Purifier Hot+Cool Formaldehyde

MPNs: 379629-01 and HP09
4.6 from 25 reviews · View Statistics
See the Best Air Purifiers in 2022 as rated by Australians on ProductReview.com.au.
Listing monitored by Dyson


13 reviews
  • Build Quality
    5.0 (1)
  • Value for Money
    1.0 (1)
  • Ease of Use
    5.0 (1)
  • Cleaning & Maintenance
    5.0 (1)
  • Pet OwnerYes (1) · No
  • Smokers Yes · No (1)
  • Noise Level
    1.0 (1)
Clear all

Reviewer Photos & Videos

  • Thumbnail
  • Thumbnail
  • Thumbnail
UpYoursCanberra 2600, ACT
  • 81 reviews

Has Dyson done it again? Unfortunately not!

  • Thumbnail
  • Thumbnail
  • Thumbnail

Purchased in June 2021.

Build Quality
Value for Money
Ease of Use
Cleaning & Maintenance
Noise Level
Incentivised Review No
Room Type Large Bedroom, Small Bedroom and Small Office
Pet OwnerYes
Smokers No
Similar opinion? Write a review on ProductReview.com.au!

Questions & Answers


Can you run night mode on the heating setting? Can you reverse the airflow on the heating setting? I have this product and cannot do either.

3 answers

Yes, you can certainly run night mode on the heating setting. The heater stays on, the LCD seems to dim a bit and the moon symbol appears on the LCD. Reversing on the heating setting seems to switch to cooling and reverses the air flow.


Hi DNR, sorry I haven't answered more quickly. domw is correct with the response already given. The night mode does allow for the heating and cooling settings to be used, changes over the airflow direction but if you use the higher level airflow outlet it changes from heating to cooling. If yours doesn't do this perhaps a call to customer service would be helpful. Be prepared to wait atm though they probably don't have full staff working (my call took around 20 minutes last week, 15 mins on hold but worth the wait the lady I spoke with was very good) Hope this is helpful.


While you can run the machine in night mode while heating, the display will dim but not completely turn off.

In terms of diffusing the airflow backwards, this is only available when the heater is not in use - heated air can't be diffused backwards.

If we can assist further, our Dyson Experts are available via phone, live chat and Facebook Messenger, (details found here: https://www.dyson.com.au/support/contact-us), please just reach out.

Get an answer from our members and Dyson representatives


The Dyson Purifier Formaldehyde Range detects formaldehyde in the air 500 times smaller than particles the size of 0.1 microns. Formaldehyde is a chemical preservative that’s often found in new furniture, paint, glue, wallpaper and household cleaning products.

How does it work?

A solid-state formaldehyde sensor uses an electro-chemical cell to detect formaldehyde in the air. The special formaldehyde filter - the Selective Catalytic Oxidisation filter - then works to destroy formaldehyde, turning it into harmless water and carbon dioxide.

The formaldehyde filter is a lifetime filter, so it won’t need to be replaced for the life of the machine.


  • Dyson's latest air purifier has the ability to heat, cool and purify a room.
  • A HEPA H13 standard filter captures 99.95% of particles as small as 0.1 microns, including allergens, bacteria, pollen and mould spores.
  • Designed with standard features of previous Dyson purifier models, including Auto mode for the heating function, Air Multiple technology for wide air circulation, Night time, Sleep time mode, and the ability to be operated using either a remote control or the Dyson Link App.
  • Voice control using Google Home, Alexa or Siri is also available with a compatible smart device.

Points of praise

  • This 3-in-1 fan, heater and air purifier provided fast and effective air circulation. Multiple reviewers happily reported that it was powerful enough to be used in place of a reliable split system AC and even a ducted AC system in a small zone.
  • This Dyson model made a room nice and toasty warm within minutes. It worked well even in rooms that were naturally chilly or had poor insulation.
  • Ease of use was generally reported to be good, with the app being easy to navigate. It was also considered easy to change filters.
  • The air purifying function was appreciated by reviewers who had household members with allergies and other respiratory issues. They observed a noticeable improvement in breathability in a room after the Dyson was used.
  • The unit is highly portable and easy to carry between different rooms in the house.

Points to consider

  • The expensive purchase price of the unit ($999) was noted by reviewers, and it often docked at least a star from individual ratings. While it was acknowledged that this fan heater and purifier performs 3 functions, the asking price was still considered to be out of many people’s budgets.
  • It was also noted that purchasing new filters represents an additional ongoing cost.
  • A number of reviewers reported that the fan heater could be too loud, especially if used on a high setting.
  • Not many people really knew if the formaldehyde-capturing function was working, but commented that it sounds like it can only be a positive addition to the machine, after researching the benefits.
CategoryAir Purifiers
Price (RRP) $999.00
HEPA FilterYes
FeaturesAdjustable Speed Settings, Automatic Air Quality Monitor, Carbon Filter, Filter Life Indicator, Mobile App, Remote Control and Timer
Voice ControlAmazon Alexa, Apple Siri / AirPlay and Google Assistant
Climate ControlCooling and Heating
Weight5.7 kg
Dimensions 764mm (H) mm
Manufacturer Warranty2 year(s)
ManualDownload manual
Visit official website
  • MPN: 379629-01 and HP09

ProductReview.com.au has affiliate partnerships. These do not influence our content moderation policies in any way, though ProductReview.com.au may earn commissions for products/services purchased via affiliate links.