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Is the Dyson Air Purifier Worth the Hype? Our Comprehensive Review

CEO Khai Intela
Image: 20221003 112547 Dyson Purifying Fan Elizabeth Heath For Fhm Ss Edit Elizabeth Heath For Family Handyman The 2020 pandemic made us all more aware of the air we breathe. Consequently, consumers are increasingly tuned...

20221003 112547 Dyson Purifying Fan Elizabeth Heath For Fhm Ss Edit Image: 20221003 112547 Dyson Purifying Fan Elizabeth Heath For Fhm Ss Edit Elizabeth Heath For Family Handyman

The 2020 pandemic made us all more aware of the air we breathe. Consequently, consumers are increasingly tuned in to issues of indoor air quality and portable air purifier purchases have soared. Because they know we all love products that multitask, several manufacturers have released cooling fans that also function as air purifiers—or are they air purifiers that also cool? Either way, we hopped on the bandwagon—read on for our full Dyson air purifier review.

What is the Dyson Purifier Cool Formaldehyde?

Dyson Purifying Fan Image: Dyson Purifying Fan Elizabeth Heath For Family Handyman

The product is part of Dyson’s line of air purifiers, all of which are medium-to-tall, tower-style models with cooling functions. The Formaldehyde model I tested (model TP09) is one that detects, captures, and destroys formaldehyde, by converting it to water and CO₂. Formaldehyde is a VOC (volatile organic compound) that’s used in many household building and finishing materials, as well as in cleaning and personal care products.


Using both a true HEPA H13 filter and an activated carbon filter, the Dyson air purifier detects and filters a host of VOCs. This includes ammonia, nitrogen dioxide, benzene, acetic acid, and acetaldehyde. It is certified asthma and allergy-friendly by the Asthma and Allergy Foundation of America, which means its benefits to people with allergies and asthma have been independently verified.

Coverage and Size

This purifier/cooling tower is designed for medium-sized rooms of up to 800 square feet. It weighs in at a manageable 16.72 pounds and stands at 41 inches high, with a narrow footprint of four inches by four inches.

Controls and App Features

The Dyson air purifier includes two reporting methods: a sleek, built-in LCD screen and the MyDyson app. The device is controlled using the LCD touchpad, app, included mini remote, or via smart voice assistants. The app controls nearly every Dyson product, and it’s handy to have available for those looking to control their air quality while away from the device. Both the LCD screen and the MyDyson app send automatic filter-life notifications, which I find helpful. Those with Apple Siri, Amazon Alexa, and Google Home can also integrate this device into their smart home setup.

Dyson Purifier Cool Formaldehyde Features

Dyson Purifying Fan Image: Dyson Purifying Fan Elizabeth Heath For Family Handyman

Here are the key features of the Dyson Purifier Cool Formaldehyde, as well as what stood out most to me during my Dyson air purifier review:

  • The cooling function has 10 levels.
  • The fan can be set in a fixed position, or to rotate the tower at 45, 90, 180, or 350 degrees.
  • A backward airflow mode still activates the air filter while not blowing cold air on room occupants.
  • The sealed HEPA H13 filter detects formaldehyde and other VOC molecules 500 times smaller than 0.3 microns.
  • The display screen shows levels of VOCs in the air, signals when the filter needs to be replaced, and has a room temperature indicator.
  • The tower can be controlled by a touchpad on the unit, via the Dyson Link app, or with Apple Siri, Amazon Alexa, and Google Home.
  • There is also a mini-remote control that attaches to the unit with a magnet, so it never gets misplaced (as long as you remember to attach it!).
  • An automatic shutoff feature is handy for those who want to run their device overnight.
  • Night mode offers a dimmed display and a quieter noise level.

How We Tested It

Dyson Purifying Fan Image: Dyson Purifying Fan Elizabeth Heath For Family Handyman

I unboxed the Dyson in the middle of August, just in time for my friends’ visit. Temperatures outside hovered in the high 90s, so the fan was put to good use in our guest room, where they reported that they slept comfortably. (It’s worth noting that they live in San Francisco, where many older homes, like theirs, don’t have air conditioning. They have a Dyson cooling tower in every room of their house!)

We’ve since moved the air purifier to our daughter’s room, where the odors from the construction project are a little stronger. But, we no longer need the cooling function. The backflow air mode, which blows air out the back of the tower instead of the front, means we can still use the purifier function without circulating as much cool air. The air purifier has definitely helped with the odor. And, if we’re screening out any harmful chemicals, which presumably we are, they haven’t markedly raised the levels in the filters yet.


  • Fan cools well
  • Remote control included
  • Activated carbon filter removes gases and odors
  • HEPA filter captures 99.97% of particles 0.3 microns in size
  • 350-degrees of oscillation
  • Detects and destroys formaldehyde
  • Compatible with Dyson app


  • Noticeable hum at higher settings
  • Blows cool out of the back when just the air purifier function is activated


Does it capture wildfire smoke?

Yes, the manufacturer claims that it does. Here’s what you need to know about wildfire smoke.

How often does the filter need to be replaced?

It’s recommended that users change the filter every 12 months, depending on how much they use it.

Can you leave the Dyson air purifier on all the time?

What Other Reviewers Had to Say

We’re not the only ones writing a Dyson air purifier review. Woodman in Virginia says, “My wife has allergies that impact her sleep. We started using the Dyson Air Purifier the day it arrived. We use it in the living room during the day then move it to our bedroom at night. Since we started using the purifier in the bedroom, my wife has been sleeping through the night and feels well-rested in the mornings.”

Storm of Earth, a user in St. Louis, praises its ability to filter dust: “I have a dog and a 1,100 square foot city home. The amount of dust that would accumulate on my shelves and furniture was astronomical until I got the site purifier. I have to dust so so so so much less now. The air quality is better.”

Final Verdict

The Dyson Purifier Cool Formaldehyde is a high-end air purifier and cooling fan that lives up to its claims. The air purifying features are harder to verify because you either have to trust the digital display or buy a separate air quality monitor—I opted for the former. But, the cooling features are excellent, as this tower fan really does serve as a great way to cool a single room.

When sleeping, our guests never had to turn the fan above level six in order to sleep comfortably. Although a longer testing period would be needed to be definitive, my two-month test resulted in a thumbs-up. I am a fan of the brand because every Dyson product I own has exceeded expectations.

There are two downsides to the Dyson Purifier Cool Formaldehyde. Dyson claims the fan is 20% quieter than previous models. I found that it ran quietly up until about level five or six when the hum became more noticeable. If I had to choose between the “white noise” type whir of the fan or staying cool, I’d still opt for staying cool. But, light sleepers and those easily distracted by background noise will notice the fan when it’s set at higher speeds. On the flip side, those who like a white noise machine or phone app to help them sleep might not need it when the fan is running.

My other point in my Dyson air purifier review is more of an observation than a criticism. When we set it to backward airflow mode, only the air purifier function is activated, so it’s not blowing cooled air. Yet the air that comes out the back still feels cool. So once we turn on the heat in our home, we’ll have to see if the backward airflow air feels like it’s making the room chillier. However, Dyson does make a formaldehyde air purifier with cooling and heating functions to offset this.

Where to Buy the Dyson Purifier Cool Formaldehyde

The Dyson Purifier Cool Formaldehyde is priced between $675 and $750 and is available on Amazon, Walmart, and the brand’s website.