Dyson HP09 Pure Hot+Cool Formaldehyde Air Purifier

Dyson HP09 Purifier Hot+Cool™ Formaldehyde purifying fan heater

Captures dust, allergens and bacteria. Even destroys formaldehyde.¹
Fully-sealed to HEPA standard – what goes inside, stays inside.

Powerful circulation to purify the whole room³
Only Dyson purifiers have Air Multiplier™ technology, to draw in distant pollutants and project purified air throughout the room.³

Senses and reports automatically
Four sensors, including a solid-state formaldehyde sensor, interact with our unique algorithm to precisely diagnose, display and react to your air quality.

Captures and destroys with advanced HEPA filtration
The HEPA+Carbon filter captures gases5 and 99.95% of particles as small as 0.1 microns.² Captures dust, allergens and viruses8, including COVID-19 virus 9. Even destroys formaldehyde.¹

Destroys formaldehyde in billions of catalytic tunnels¹
Dyson's unique catalytic filter continuously traps and converts formaldehyde into water and CO2. And it self-regenerates, so it never needs replacing.

The only purifier fully sealed to HEPA H13 standard
To prevent pollutants leaking back into the air, it's not just the filter that's sealed to HEPA H13 standard, it's the whole purifier⁴. So what goes inside, stays inside.

Heating your whole home can be costly and unnecessary
Dyson heater purifiers provide long range and whole room heating solutions in winter, so you don’t have to heat your whole home. Dyson’s Purifier Hot + Cool Machines have built in thermostats which can save you up to 30% in running costs when maintaining room temperature¹⁰

Heats in winter. Cools you in summer.
In winter, Air Multiplier™ technology projects purified, heated air throughout the room.⁴ Once your target temperature is reached, heating automatically stops. In warmer weather, Air Multiplier™ projects over 290 litres of air a second for cooling airflow.

Smart purification, controlled by app or voice
Control and monitor air quality from anywhere with the Dyson Link app,⁶ or hands-free with compatible voice services.⁷

Diffused mode. Purifies without cooling you.
Airflow is diverted through the back of the machine, maintaining effective purification.

Oscillates up to 350 ̊
Adjustable oscillation projects purified air around the whole room.

Night mode
For lighter sleepers, it monitors and purifies using the quietest settings along with a dimmed display.

Easy filter care
The catalytic filter never needs replacing. And when you need a new HEPA+Carbon filter, the Dyson Link app⁶ lets you know.




1 Third party full machine testing based on GB/T 18801-2018 formaldehyde cumulative clean mass testing with continuous injection until plateau of formaldehyde CADR is achieved. Results may vary in practice.
2 Tested for filtration efficiency at 0.1 microns (EN1822, ISO29463)
3 In maximum setting. Tested for air projection, purification coverage in a 81m3 room.
4 Particle challenge by DEHS oil specified in EN1822 within a chamber specified in ASTM F3150. Tested in Max Mode at IBR US, for whole machine efficiency above 99.95%.
5 Gas capture rates may vary.
6 Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply. App control doesn’t apply to heating.
7 Refer to the Dyson Link app for compatible voice services.
8Dyson purifiers were challenged with airborne influenza A (H1N1 virus) and MS2 bacteriophage at an independent lab, using a 30 m3 chamber. After 60 minutes at maximum fan speed, the airborne concentration in the chamber was reduced up to 99.9 %. Real-life efficacy may vary.
9Dyson purifiers were challenged with airborne SARS-CoV-2 (the virus that causes COVID-19) at an independent lab, using a 0.37 m3 chamber for 90 seconds. Dyson Purifiers were also challenged with Phi-6 bacteriophage (a surrogate to test SARS-CoV-2) at an independent lab, using a 30 m3 chamber. After 90 minutes at maximum fan speed, the airborne concentration in the chamber was reduced by 99.9 %. Real-life efficacy may vary.
10After reaching target temperature and maintaining it. Tested in a 35 m3 chamber when using the hot air mode and the product setting temperature is 25 °C. Comparing with continuous operation with power consumption of 2050W. Real life results may vary depending on room insulation.