Dyson Purifier Humidify+Cool PH2 De-NOx review: a premium cooling and purifying appliance that makes air noticeably clearer

This UK summer has been one of the hottest on record so unsurprisingly, there’s been a huge demand for fans and air purifiers to keep cool during the intense heatwaves. I have been surviving the heatwaves using my collection of hybrid appliances from Dyson, like the Dyson Purifier Humidify+Cool PH2 De-NOx.

The Dyson Purifier Humidify+Cool PH2 De-NOx is a purifying, humidifying fan which offers three functions in one premium design. Launching in late 2025, this new model features the brand’s most advanced filters to date that are designed to capture bacteria, pollutants and harmful gases to make the air in your home cooler and more hygienic.

Having spent the past few weeks testing the Dyson Purifier Humidify+Cool PH2 De-NOx, I can confidently say that I’ve noticed a difference to the air in my house – here’s how I got on.

Dyson Purifier Humidify+Cool PH2 De-NOx review: price and availability

The Dyson Purifier Humidify+Cool PH2 De-NOx is available to buy for £699.99 / $1,099.99 at Dyson and select retailers, like John Lewis. It’s often discounted, and as of writing, it’s £100 cheaper at Dyson.

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Dyson Purifier Humidify+Cool PH2 De-NOx review: set up and design

The Dyson Purifier Humidify+Cool PH2 De-NOx arrived in a large cardboard box which had the purifying, humidifying fan completely put together. Alongside an instructions manual was a remote control, plug and power cord, the latter of which measured 1.8m in length.

Setting up the Dyson Purifier Humidify+Cool PH2 De-NOx was easy as it came assembled with the 360-degree HEPA + K-Carbon filter already inside. All I had to do was plug the cord into the device at the back and into a power outlet, and remove stickers from the sides.

Available in white and gold, the Dyson Purifier Humidify+Cool PH2 De-NOx has a very recognisable design which is seen across Dyson’s fan collections, as well as its purifiers, heaters and humidifiers. It consists of a white large loop circular fan at the top of the design, and has gold on the main filter body.

A water tank sits at the bottom of the Dyson Purifier Humidify+Cool PH2 De-NOx which is easy to fill, empty and remove. Its on-device controls sit in the middle, which include on/off and deep clean buttons, and an LCD screen which shows settings and uses sensors to analyse and display real-time air quality data.

Measuring 923mm in height, it has a 280mm diameter on the shrouds and a 312mm diameter on the bottom or ‘skirt’. It weighs 8.12kg but when you fill the tank – which has a five litre capacity – it can get quite heavy.

The Dyson Purifier Humidify+Cool PH2 De-NOx has on-device controls, but it also comes with a handy remote. The remote has power and information buttons, as well as auto mode, night mode and a timer. It has 10 fan speeds that can be adjusted via the + and - buttons, and five humidity levels from 30% to 70% which can also be customised.

The remote control also has an oscillation button which offers 90 degrees of oscillation and its diffused mode which reverses airflow direction to the back instead of the sides to purify and humidify without expelling a breeze. The Dyson Purifier Humidify+Cool PH2 De-NOx is also compatible with the MyDyson app which unlocks additional features, like personalised reports, scheduling and remote monitoring.

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Dyson Purifier Humidify+Cool PH2 De-NOx review: features

As the name states, the Dyson Purifier Humidify+Cool PH2 De-NOx is a purifier, humidifier and fan, all in one device. The upgraded filter is a combination of HEPA H13 and K-Carbon layers which works to purify the air in your home.

The HEPA H13 filter captures 99.95% of particles, including allergens, pollen and bacteria which can be as small as 0.1 microns. The K-Carbon layer features potassium carbonate which forms a chemical bond to trap pollutants like gas, volatile organic compounds, formaldehyde, NO2, dust and odours. The filter is fully sealed so it doesn’t expel dirt back into the air.

The Dyson Purifier Humidify+Cool PH2 De-NOx uses Air Multiplier technology to circulate purified and humidified air around the room. It also uses Ultraviolet Cleanse technology to remove bacteria with its water management system and tank. It offers 81m3 room coverage and has a maximum sound level of 62.4 dBA and minimum of 46 dBA.

Dyson Purifier Humidify+Cool PH2 De-NOx review: performance

During testing, I mainly used the Dyson Purifier Humidify+Cool PH2 De-NOx in my bedroom to get me through the hotter, humid nights the UK has recently been experiencing. My bedroom is in the attic of my house so it gets extremely hot and cloying, but after having the Dyson Purifier Humidify+Cool PH2 De-NOx in it, I noticed some serious changes.

As a fan, the Dyson Purifier Humidify+Cool PH2 De-NOx is hard to beat. It’s extremely cooling and it’s got a good oscillation range and movement that fully covers a room comfortably. Being able to switch it to diffused mode was invaluable as it still allowed the Dyson Purifier Humidify+Cool PH2 De-NOx to purify my room and emit a small breeze without feeling like I was being blasted with cold air.

The Dyson Purifier Humidify+Cool PH2 De-NOx’s purification and humidification power is what I noticed made the biggest difference to my room. Despite having slanted velux windows, pollen always seems to get in and make me sneeze at night, but while using the Dyson Purifier Humidify+Cool PH2 De-NOx, I didn’t have any issues with it.

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Similarly, my bedroom gets extremely humid but the Dyson Purifier Humidify+Cool PH2 De-NOx helped manage the humidity levels which made my room feel noticeably cooler, clearer and less stuffy.

I’ve tested many Dyson products and have always liked the look of them. The Dyson Purifier Humidify+Cool PH2 De-NOx is no exception, and its white and gold style blended in nicely to my home. To say it isn’t invasive would be a lie – the Dyson Purifier Humidify+Cool PH2 De-NOx is a large appliance so it does stick out but you won’t really mind considering how well it performs.

I’ve previously found Dyson fans and humidifiers to be quite loud but I didn’t find that to be the case with the Dyson Purifier Humidify+Cool PH2 De-NOx. Its night mode was especially quiet but still powerful and it gave great relief during the night without being too disruptive. I also liked its on-device and remote controls as they offered plenty of adjustments.

The one downside I could find with the Dyson Purifier Humidify+Cool PH2 De-NOx is its weight. With the tank full, it gets very heavy, and it’s also not the easiest thing to move around. I’ve spoken to Dyson employees who have categorically told me to not put my arm through the loop to lift it, yet that’s the only way I can even attempt to move it around.

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Dyson Purifier Humidify+Cool PH2 De-NOx review: verdict

Dyson really knows what it's doing with hybrid appliances, and the Dyson Purifier Humidify+Cool PH2 De-NOx is a perfect example of this. It purifies, cools and humidifies expertly, and makes a huge difference to the air quality and feel in your home.

The Dyson Purifier Humidify+Cool PH2 De-NOx offers plenty of adjustments and controls to play with. It looks great, performs quietly and shows you real-time information about your home on the LCD screen and via the app.

Price will be a drawback for some people. It’s around £700 in the UK and over $1,000 in the US, but if you take the plunge, you can definitely use the Dyson Purifier Humidify+Cool PH2 De-NOx all year round and get the most out of your purchase. Its weight is another downside, but once you get it in place, you shouldn’t have to worry about it too much.

Dyson Purifier Humidify+Cool PH2 De-NOx review: alternatives to consider

A similar product – and one I’ve also got in my house – the Dyson Purifier Humidify+Cool Formaldehyde looks and acts the same as the Dyson Purifier Humidify+Cool PH2 De-NOx. It purifies, cools and humidifies, but the Dyson Purifier Humidify+Cool PH2 De-NOx has a more advanced filter.