
Dyson - Purifier Humidify+Cool Formaldehyde PH04
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Based on 1 year's data from Mar 18, 2026 How it works
No issues with PH04 I had for two years regarding mold, returned two times as pump broke but no mold
I have the PH01 and PH04, touch wood both units still work and I’m happy about its operation. The most important thing is, you MUST NOT put the pump cover upside down, otherwise the water may seep into the circuit board and cause most of the other issues. Also it designs to humidify a room, instead of an open space. You don’t need to use distilled water, but you need to clean the filter and pump with citric acid at least once a month with deep clean function to prevent scale build up. This is an evaporative humidifier so it will not have white dust issue. Hopefully you get the good unit to begin with.
I went through lots of humidifiers over the years and they all seemed not to be very good. Now I have a Dyson and while it’s hideously expensive it’s easily the best one I’ve ever owned.
I have a Dyson and it’s expensive but the best one I’ve ever owned.
Don’t bother with Dyson. I have a super expensive piece of junk sitting in my living room as the part is nowhere to be found for ordering (it’s been 6months). Their service center is like 70km away one way from me and doesn’t bother to answer the phone so I don’t even know if they have the part. And their CS is deplorable - they said oh well go call our retailers. They might have it (they won’t).
I love our Dyson but it's pricey
End of reviews