The Dyson Humidify+Cool PH2 De-NOx is a high-end 3-in-1 machine that purifies, humidifies and cools your room in one sleek tower. It’s designed for households that take air quality seriously, particularly where pollution, allergies or dry air are everyday concerns.
This is very much a premium option in the air purifier category, and the price reflects that. In return, you get advanced HEPA H13 filtration, dedicated NO₂ reduction and a built-in humidifier with a generous tank, all wrapped in Dyson’s familiar bladeless design.
With an impressive 4.7 out of 5 rating from dozens of owners, it’s clearly delivering for most buyers, especially those who want one well-specified unit instead of multiple separate devices.
The Dyson Humidify+Cool PH2 De-NOx is best suited to people who want a single premium appliance to handle air purification, humidity control and cooling in medium to larger rooms. If you’re fed up with running a separate fan, humidifier and purifier, this will tidy everything up in one smart-looking unit.
It’s a strong choice for allergy and asthma sufferers, thanks to HEPA H13 filtration and a three-stage system designed to capture fine particles and allergens. The specific focus on NO₂ reduction will also appeal if you live near busy roads or cook a lot on gas hobs.
Given the price, it’s aimed more at buyers with a comfortable budget rather than bargain hunters. It makes most sense if you’ll use it year-round – purifying and humidifying through the cooler months, then switching to cooling mode in summer.
If you’re comfortable with connected tech, there’s plenty here for you too: app control, voice control with Alexa, Google Assistant and Siri, plus auto modes and scheduling make it a good fit for smart homes.
The 3-in-1 design is the headline: you get a purifier, humidifier and cooling fan in one footprint, which saves both space and clutter. For many homes that could replace two or even three separate appliances.
Filtration is very strong on paper, with HEPA H13 and a three-stage system designed to trap 99.95% of pollutants, including allergens and fine particles, while the De-NOx element targets nitrogen dioxide more effectively than previous Dyson humidifier-purifiers.
The 5-litre (around one gallon) tank offers up to 36 hours of continuous humidification, so you’re not constantly refilling it during dry spells. That makes it practical for overnight or all-day running.
Air Multiplier technology and 90° oscillation help push purified, humidified air across the room, rather than just in a narrow stream. Combined with ten speed settings and an 8-hour sleep timer, it’s easy to tailor the airflow to your comfort.
Smart features are excellent: there’s a built-in display, auto mode, sleep timer, remote control, Wi-Fi and Bluetooth, plus compatibility with the MyDyson app and the major voice assistants. For a connected home, it’s a very complete package.
The obvious drawback is price. This Dyson sits towards the premium end of the air purifier category, so it won’t appeal if you’re just after a basic purifier for occasional use.
There’s only a 2-year manufacturer warranty, which feels a little modest at this price point, especially for a product you’re likely to run for long periods every day.
While the 61.6 dB operating noise quoted is reasonable for a powerful fan on higher settings, it may still be noticeable in a very quiet bedroom if you prefer a completely silent environment.
Finally, there’s some duplication and mild confusion around the MyDyson app naming in the spec, and like many smart appliances, you’ll need to be comfortable with app setup and Wi-Fi connectivity to get the most from it.
In day-to-day use, the Dyson Humidify+Cool PH2 De-NOx is designed to be as hands-off as possible. Auto mode monitors conditions and adjusts fan speed and humidification automatically, so you can largely set it and forget it.
The tower footprint is slim (22 cm wide and 15.5 cm deep) and tall at 92.3 cm, so it slots neatly beside a sofa or in a corner without dominating the room. The bladeless design also feels safer in homes with children and pets, and it’s easy to wipe down.
The onboard display gives you clear at-a-glance feedback on current settings and air conditions, while the remote control and app mean you rarely have to walk over to the unit itself. Voice control support adds another easy way to tweak settings from the sofa or bed.
Maintenance is helped by Ultraviolet Cleanse technology in the water system, which is there to keep the humidification side hygienic. You will still need to top up the 5-litre tank and eventually replace filters, but the large capacity and Dyson’s guidance in the app should keep this from becoming a chore.
With ten fan speeds and a sleep timer up to 8 hours, you can tune noise and airflow to your comfort level. Lower speeds should be perfectly acceptable for bedroom use, with higher settings reserved for quick clean-and-cool sessions in living spaces.
Performance centres on three pillars: purification, humidification and cooling. The HEPA H13 classification, combined with a three-stage filtration system, means the PH2 is built to capture very fine particles, pet dander and common allergens. The De-NOx design is particularly attractive if outdoor pollution or gas cooking are concerns, as it’s engineered to capture more nitrogen dioxide than Dyson’s previous humidify-and-purify models.
The integrated humidifier uses a 5-litre tank, quoted to last up to 36 hours of continuous use. That’s generous capacity for an all-in-one unit and helps maintain a comfortable humidity level without constant refilling, especially useful in centrally heated homes where the air gets very dry in winter.
As a cooling fan, Air Multiplier technology and 90° oscillation project a smooth, continuous stream of air rather than choppy gusts. With ten speed settings, there’s enough range to go from a gentle background breeze to a more powerful cooling blast when the temperature climbs.
Smart and convenience features are a strong point. Auto mode adjusts operation based on room conditions; the quick standby feature makes it simple to pause; a sleep timer supports up to 8 hours; and Ultraviolet Cleanse works to keep the humidification system hygienic. Connectivity via Wi-Fi and Bluetooth, along with the MyDyson app, allows remote monitoring and control, scheduling and potentially firmware updates over time.
Voice control with Amazon Alexa, Google Assistant and Siri rounds off the feature set nicely, making it easy to integrate into a wider smart home. Considering how crowded the air treatment category is, this Dyson stands out by combining an advanced spec sheet across three roles in a single, refined unit.
This Dyson sits firmly in premium territory for air purifiers, and the price will be a stretch if you simply want a basic purifier for occasional use. However, when you factor in that it combines a quality purifier, a proper humidifier and a capable cooling fan, the cost becomes easier to justify, especially if you’d otherwise be buying separate devices.
The specification is strong across the board: HEPA H13 filtration, specific NO₂ capture, a 5-litre tank, 36-hour humidification, Air Multiplier airflow and a full suite of smart features. Many cheaper models offer only basic filtration and limited connectivity, so you are paying for a richer feature set.
The AO user score of 4.7 out of 5 from a decent number of reviews suggests that most owners feel they’ve had good value, despite the higher initial outlay. If you’ll use the machine year-round and appreciate the convenience of an all-in-one solution, it represents solid value within the premium band.
If your budget is tight or you don’t need humidification, you may find better value in a simpler purifier-fan, but as an integrated air care solution this Dyson makes a compelling case for itself.
The Dyson Humidify+Cool PH2 De-NOx is a sophisticated all-rounder for indoor air care, combining purification, humidification and cooling in one elegant tower. Its HEPA H13 filtration, focus on NO₂ capture and sizeable 5-litre tank make it a strong choice for allergy-prone households, city flats and anyone serious about improving their indoor air.
It’s undeniably expensive, and the 2-year warranty is on the modest side for such a premium purchase. If you just want a simple purifier for occasional use, there are more affordable options that will do the job.
But if you’re looking to invest in a single, high-quality unit you can run throughout the year – backed by excellent smart features and a very positive owner rating – the Dyson Humidify+Cool PH2 De-NOx is one of the most compelling 3-in-1 options currently available.
