Dyson Purifier Hot+Cool HP2 De-NOx review: the HP2 is not a conventional space heater. It combines whole-room heating and fan cooling with a sealed three-stage purification system, HEPA H13-grade filtration, K-Carbon gas filtration and a catalytic formaldehyde filter.
That makes the buying decision very different from a $50 ceramic heater. The HP2 is aimed at someone who wants one premium appliance for heating, cooling airflow and air-quality management. If you only need supplemental heat, the price and replacement-filter cost are difficult to justify.
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Quick Verdict
The HP2 De-NOx is worth considering when purification is as important as heating. Its strongest features are 350-degree oscillation, app scheduling, live air-quality data, HEPA H13-grade filtration, formaldehyde destruction and enhanced NO₂ adsorption. As a heater alone, it is poor value compared with a dedicated 1500W portable heater.
Dyson HP2 De-NOx Specifications
| Functions | Heating, cooling airflow, air purification |
| Filtration | Fully sealed 3-stage HEPA H13-grade system |
| Particle claim | Dyson states 99.97% capture at 0.3 microns |
| NO₂ | K-Carbon filter; Dyson states 50% more NO₂ adsorption |
| Formaldehyde | Catalytic filter continuously destroys formaldehyde |
| Oscillation | Up to 350° |
| Speed settings | 10 |
| Height | 30.1 in |
| Weight | 12.1 lb |
| App | MyDyson app with schedules and air-quality data |
| HEPA+K-Carbon replacement | Dyson recommends about every 12 months based on stated usage conditions |
Heating Performance
Dyson positions the HP2 for whole-room heating with oscillation that circulates purified air. The advantage over a basic ceramic heater is integrated airflow management and purification, not simply more heat. Buyers should compare the HP2 with other premium heater-purifiers rather than expecting it to outperform dedicated high-wattage heaters on heating value alone.
What De-NOx Adds
The HP2 uses a potassium-carbonate-impregnated K-Carbon filter. Dyson says it adsorbs 50% more nitrogen dioxide than its previous relevant filtration system. NO₂ can be produced indoors by combustion sources such as gas appliances, open flames and wood-burning stoves. The catalytic formaldehyde filter is separate and is designed not to require replacement.
App, Scheduling and Air Quality
The MyDyson app can adjust airflow, oscillation and sleep functions, create a seven-day schedule and display current and historical air-quality information. These are meaningful features if the HP2 will run as an air purifier throughout the year rather than only during winter.
Strengths
- Three functions in one appliance: heat, cooling airflow and purification.
- 350-degree oscillation offers broad airflow direction.
- HEPA H13-grade sealed filtration plus K-Carbon and catalytic formaldehyde treatment.
- MyDyson scheduling and air-quality history are useful for year-round operation.
- No exposed heating blades and a mature app ecosystem.
Limitations
- Very expensive compared with a dedicated portable heater.
- HEPA+K-Carbon filter is a recurring maintenance cost; Dyson recommends replacement roughly annually under its stated usage assumption.
- Cooling mode moves air but is not air conditioning and does not refrigerate the room.
- Its value falls sharply if you do not need purification.
HP2 vs HP1
The HP1 is the more straightforward current Dyson heater-purifier and is already covered in our Dyson HP1 review. The HP2 adds the De-NOx filtration focus and formaldehyde treatment. If those pollutants are not a priority, the HP1 can be the more rational buy when priced substantially lower.
Who Should Buy It?
The HP2 is best for a household already considering a premium purifier and that also wants supplemental heat and fan airflow in the same footprint. It is not the right product for a buyer whose only goal is inexpensive winter heat.
FAQs
Does the Dyson HP2 heat a room?
Yes. Dyson markets it for whole-room heating while circulating purified air.
Is the cooling mode an air conditioner?
No. It provides fan-driven cooling airflow; it does not use refrigeration to lower room temperature like an AC.
How often does the filter need replacement?
Dyson recommends replacing the combined HEPA+K-Carbon filter about every 12 months based on 12 hours per day of use; actual timing varies.
Does it remove formaldehyde?
Dyson states that its catalytic filter continuously destroys formaldehyde and does not need replacement.
Does it work with an app?
Yes. The MyDyson app provides controls, scheduling and air-quality data.
Conclusion
The HP2 De-NOx is compelling as a multi-function air-treatment appliance, not as a value space heater. Its filtration and connected controls are the reason to pay the premium. Dyson’s HP2 De-NOx page provides the current product and filtration details.
