Dyson
Dyson Purifier Humidify+Cool PH2 De-NOx: Detailed Spec Analysis
The Dyson Purifier Humidify+Cool PH2 De-NOx is a premium 3-in-1 unit that combines H13 HEPA air purification, evaporative humidification, and bladeless cooling in one sleek tower. It stands out with its De-NOx technology targeting nitrogen dioxide gases alongside standard particles and odors, making it ideal for urban apartments and allergy-prone households willing to invest in Dyson's ecosystem.
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Last updated: . Based on our analysis of 865+ air purifiers.
What Sets It Apart
Key specification highlights based on our analysis.
H13 HEPA Filtration
Medical-grade H13 HEPA filter captures 99.95%+ of particles at 0.3 microns
Smart WiFi Connected
App control and monitoring (125 out of 932 purifiers have WiFi)
Auto Mode with Air Quality Sensor
Automatically adjusts fan speed based on real-time air quality readings
Why We Recommend It
- 01.
H13 HEPA filtration captures 99.97% of airborne particles including pollen, dust mites, pet dander, and bacteria down to 0.3 microns
- 02.
3-stage filtration with activated carbon layer absorbs odors, VOCs, and gases while the De-NOx catalyst neutralizes NO2 pollution
- 03.
Full smart connectivity , Dyson Link app provides real-time air quality data, scheduling, and remote control plus Alexa and Siri voice support
- 04.
Built-in humidifier adds moisture without mist, using UV-C light to kill 99.9% of bacteria in the water before dispersal
- 05.
Auto mode with onboard air quality sensor adjusts fan speed and purification intensity in real time without manual intervention
Considerations
- 01.
270 sq ft coverage area limits this to single-room use , not suitable for open-plan living spaces or whole-house air purification
- 02.
Premium Dyson tier extends to replacement filters, which are proprietary and typically cost more than third-party compatible alternatives
- 03.
At 17.9 lbs with a 36.34-inch height, it's not the most portable unit if you plan to move it between rooms frequently
Technical Specifications
| Feature | Specification |
|---|---|
| Purifier Type | Hybrid |
| Coverage Area | 270 sq ft |
| Filtration Stages | 3-stage |
| Filter Type | Hepa h13 |
| HEPA Grade | H13 |
| Carbon Filter | Yes |
| WiFi | Yes |
| App Control | Yes |
| Voice Assistant | Yes |
| Auto Mode | Yes |
| Air Quality Indicator | Yes |
| Height | 36.34" |
| Width | 8.66" |
| Depth | 6.1" |
| Weight | 17.9 lbs |
Filtration Technology
The PH2 De-NOx uses a 3-stage filtration system starting with a sealed H13 HEPA filter that captures 99.95% of ultrafine particles at 0.3 microns , including bacteria, pollen, and smoke particles. The activated carbon layer absorbs gases, odors, and VOCs like formaldehyde and cooking fumes.
What sets this apart from most competitors is the De-NOx catalytic oxidation filter, which continuously breaks down nitrogen dioxide into harmless components , a technology rarely found outside Dyson's lineup.
Noise & Performance
With 270 sq ft of rated coverage, the PH2 De-NOx is sized for bedrooms, home offices, and small living rooms. Dyson uses Air Multiplier technology to project purified air across the room without exposed blades, which helps distribute clean air evenly.
While specific CADR and decibel ratings aren't listed for this model, Dyson purifiers in this class typically range from around 35 dB at the lowest setting to 55+ dB at maximum , manageable for office use but potentially noticeable in quiet bedrooms.
Smart Features & Controls
This is one of the most connected purifiers available, with WiFi-enabled Dyson Link app control for real-time air quality monitoring, scheduling, and remote operation from anywhere. Auto mode uses the onboard particulate and gas sensors to dynamically adjust fan speed based on detected air quality changes.
Voice control through Alexa and Siri adds hands-free convenience, and the included remote control magnetically stores on top of the unit.
Filter Maintenance
Dyson recommends replacing the HEPA+carbon filter approximately every 12 months depending on usage and air quality conditions. The humidifier component requires periodic deep cleaning cycles , the machine prompts you through this process via the app.
A filter change indicator alerts you when replacement is due, removing the guesswork from maintenance scheduling.
Who Is This Air Purifier For?
Ideal For
- ✓ Allergy and asthma sufferers , H13 HEPA captures 99.97% of allergens and auto mode reacts to rising particle counts without manual adjustment
- ✓ Urban apartment dwellers near traffic , the De-NOx catalyst specifically targets nitrogen dioxide, a gas most standard purifiers ignore entirely
- ✓ Smart home enthusiasts , WiFi app control, voice assistant integration, and real-time air quality reporting fit seamlessly into connected households
- ✓ Pet owners in small-to-medium rooms , activated carbon neutralizes pet odors while HEPA filtration traps dander and fine hair particles
Not Ideal For
- ✕ Large room or whole-house coverage needs , at 270 sq ft, you'd need multiple units for spaces over 300 sq ft
- ✕ practical buyers , Dyson's premium tier on both the unit and proprietary replacement filters adds significant long-term investment
- ✕ Light sleepers who need near-silent operation , Dyson fan-based purifiers can produce noticeable airflow noise even at lower speeds
Setup is straightforward , remove the unit from packaging, install the sealed filter cartridge into the base (it clicks into place), fill the water tank if using humidification, and power on. WiFi pairing through the Dyson Link app takes a few minutes and unlocks full smart features.
Run the unit on maximum speed for the first hour to cycle the room air and calibrate the sensors before switching to auto mode
Place at least 12 inches from walls to ensure unobstructed 350° airflow for optimal purification coverage
Dyson typically offers a 2-year manufacturer warranty on purifiers covering parts and labor, with registration through the Dyson app or website. Verify current warranty terms directly with Dyson at purchase, as coverage details may vary by retailer.
FAQ
What does the De-NOx feature actually do on the Dyson PH2?
The De-NOx catalytic filter specifically targets nitrogen dioxide (NO2), a harmful gas produced by vehicle exhaust and gas stoves. Unlike standard carbon filters that merely absorb gases temporarily, the catalytic oxidation process continuously breaks NO2 down into harmless components.
This makes the PH2 particularly effective for homes near busy roads or in urban areas with elevated air pollution.
Can the Dyson PH2 purify air without using the humidifier?
Yes, the purification, humidification, and cooling functions operate independently. You can run it as a standalone air purifier with H13 HEPA filtration and the De-NOx catalyst without activating the humidifier.
The Dyson app lets you control each function separately based on your needs.
How often do you need to replace the HEPA filter on the Dyson PH2?
Dyson recommends filter replacement approximately every 12 months under normal use. The unit has a built-in filter life indicator that tracks usage and alerts you when a replacement is needed.
Homes with pets, smokers, or higher pollution levels may need more frequent changes.
Is 270 sq ft coverage enough for a living room?
At 270 sq ft, the PH2 handles standard bedrooms and small-to-medium living rooms effectively. For larger open-plan spaces, you would need a purifier rated for higher coverage or a second unit.
Measure your room dimensions , a 15 x 18 foot room is already at the limit of this unit's rated area.
Does the Dyson PH2 work with Alexa and Google Home?
The PH2 supports Alexa and Siri voice control through the Dyson Link app and WiFi connectivity. You can use voice commands to power on, adjust speed, and check air quality.
Google Home compatibility should be verified with Dyson's current supported platforms list, as integration availability can change.
How does the Dyson PH2 humidifier prevent bacteria and mold growth?
The PH2 uses UV-C light technology to kill 99.9% of bacteria in the water tank before the moisture is dispersed into the air. It uses evaporative humidification rather than ultrasonic mist, which means no white mineral dust on furniture.
The machine also prompts regular deep cleaning cycles through the app to prevent any buildup.
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Bottom Line
The Dyson PH2 De-NOx is a premium 3-in-1 solution that justifies its tier for buyers who want medical-grade H13 HEPA air purification, intelligent humidification, and best-in-class smart features in a single compact unit. The De-NOx technology adds genuine value for anyone living near traffic or concerned about indoor gas pollutants.
However, if you need coverage beyond 270 sq ft or want to minimize ongoing additions, more accessible single-purpose purifiers will serve you better.
Best for tech-savvy urban dwellers who want premium 3-in-1 purification, humidification, and cooling with smart home integration in rooms up to 270 sq ft
Consider alternatives if you need large-room coverage over 300 sq ft or want lower long-term filter additions
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