Dyson

Pure Hot+Cool Formaldehyde HP09

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Dyson Pure Hot+Cool Formaldehyde HP09

Overall

#289 in

Air Purifiers

according to Reddit Icon Reddit

User sentiment57% positive
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Top Pros

No summary available.

Top Cons

Last updated: Apr 6, 2026

Reddit Reviews

Reddit Icon1-760-706-7425 0.6
r/AirQualityWhat air purifier is the good/best to get for BEDROOM in today's market?
7 months ago

Oh, fuck no. As an owner of four of these things, they’re some of my most regretted purchases. They have a laughably low CFM, are stupid loud on even medium speeds, develop squeaky bearings within months, the filters are expensive as shit, and the software sucks. Seriously, do not buy one of these. Edit: I have two TP07s, an HP04, and an HP09. They all suck equally.

Reddit Iconjamzontoast 0.6
r/smarthomeAnyone have a air purifier?
about 1 month ago

We've got a Dyson HP09, I've integrated with Home Assistant, so it will turn on or off automatically if the air quality drops (while I'm cooking), then on and off during certain times when I turn the room's lights on or off. Haven't don't much more than that but it's a great bit of kit, and also looks good in the room

Reddit Iconvorgonaut 0.6
r/BuyItForLifeThe REAL best air purifier - I HATE DUST!
12 months ago

Look for true HEPA filtration, and formaldehyde filtration. Dyson TP09 or HP09 are amazing, as is their BEAST the new Big+Quiet Formaldehyde purifier. These are very well made and designed purifiers with a true commitment to air quality. Some of these purifiers end up making things worse.

Reddit IconComfortable-Nature37 0.2
r/BuyItForLifeAvoid Dyson fan/air purifiers
6 months ago

Dyson Pure Hot + Cool Link. I think it’s from 2016? The filters are a continuing cost but overall very happy with it.

Reddit IconOne-Revenue-7654 0.2
r/AirQualityWhat is the best air purifier out there?
9 months ago

If you looking for filter out dust you need the one has big and powerful fan but if you need one to filter out VOC and a microscopic stuff you better of looking for multi layer filter system with HEPA , I have used Coway for dust and Dyson formaldehyde for microscopic and IQAIR multigas for road traffic pollution next to my apartment!

Reddit IconSarionum 0.2
r/BuyItForLifeWhat Air Purifier should i get against dust?
8 months ago

There is truly no "one and done" air purifier for dust, as dust is too heavy to be pulled by typical air purifiers. The Dyson formaldehyde air purifier attempts to solve this issue, but directing air at stagnat pockets within a room to encourage dusty air to make it way towards the filter intake. That'll most likely be your best bet against dust if you don't want to manually remove it, ie vacuum, brush, etc etc.

Reddit Icondropdeadbarbie 0.2
r/TwinCitiesAir Purifiers Worth it?
8 months ago

i splurged and got the dyson air purifier that also works as a fan and space heater. personally, it was well worth the investment. i'm able to monitor the air quality, humidify and temperature in my home through an app.

Reddit IconNorCalGuySays 0.2
r/SacramentoHow many of us use air purifiers in the home?
4 months ago

It’s not necessary unless you have bad allergies or if there is smoke from some huge fire (knock on wood). I have Dyson combo fan/heaters with air purifier, so it’s automatically working when I use them.

Reddit Icontreebark555 0.2
r/homeownersThe Best Air Purifier for Home to Buy now? Do you find the air in your house actually better since you started using it?
5 months ago

I went to Costco to buy a winex brand for 500.00. When I got there the Dyson air purifier/ heat and cool were marked down from 600.00 to 200.00. So I bought two for less than one! I really, really like them.

Reddit IconLychee444 0.2
r/delhiWhy So may negative reviews around Dyson?
5 months ago

Been using hot+cool since a few years and it makes my room so warm and toasty in winters.

r/delhiWhy So may negative reviews around Dyson?
5 months ago

I changed my filter after 2 years so I don’t agree with this. The technician just cleaned it and told me it isn’t as bad and I should continue using it.