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Dyson Purifier Cool Formaldehyde™ TP09 (White/Gold)

Overall rating

87% of reviewers would recommend to a friend.

Asthma Attacks stopped


I have been having asthma attacks during the night and advice was to get a purifier. I had to think if this machine was worth it but I am happy since you could really compare the air outside and a home with purifier in it. Worth every penny!

Frequently asked questions

What's new about the Dyson Purifier range and how is it different to other purifiers?

Dyson engineers are perfectionists. Channeling our relentless dissatisfaction, we have re-engineered our latest purifiers to be fully sealed to HEPA H13 standard.⁹ Two phases of purification sit within a fully-sealed filtration and airflow system to trap pollutants inside, preventing them from leaking back into the air you breathe. This machine is also 20% quieter than previous models, achieving lower sound output without any compromise to purification performance.

What is different about the Dyson Purifier Formaldehyde range?

The Dyson Purifier Formaldehyde range has all of the capabilities found in our advanced purification products, but goes a step further to detect and destroy formaldehyde.⁺ An added solid-state sensor precisely detects formaldehyde, while our catalytic filter breaks it down into two safer molecules – carbon dioxide and water.

What is formaldehyde and what are its common sources?

Formaldehyde is a polluting gas formed of carbon, hydrogen, and oxygen that is commonly found in homes. Sources of formaldehyde in your home could include paint and varnishes, air fresheners, mattresses, furniture, household cleaners, carpets, particleboard and plywood, electronics, dryer sheets, nail polish remover, moth balls, toys, fireplaces, and wood burning stoves.

What is HEPA H13?

HEPA grades refer to filtration effectiveness for specific sizes of airborne particles. HEPA H13 is a filter with 99.95% removal of the specific particle size that most readily makes it through that specific filter. Dyson filters also capture 99.97% of particles down to 0.3 microns in size, including common pollutants such as allergens*, dust, and smoke particulates.

How often should I replace my filter?

We recommend replacing the HEPA+Carbon filter roughly every 12 months, depending on how often you use it. That’s because over time filters can become clogged with pollutants and even let unpleasant odors back into the room. The machine will alert you when it’s time to change filters. A filter life reading can be found on the LCD screen and via the MyDyson app.⁵ The catalytic filter never needs replacing.

What is the cooling functionality of TP09? Is it an air conditioner?

No, TP09 can serve as a fan, which can help cool you. It is not an air conditioner.

Do Dyson purifiers capture wildfire smoke?

Dyson purifiers capture wildfire smoke.¹¹