Dyson Humidifier + Cool Formaldehyde Review | Fans, Humidifiers, Air Purifiers and One More


– quiet fan sound
– Easy-to-use humidifier
– Great screen and app showing air quality
– Sensitive air purifier performance

– Slight buzzing sound during use
– Not easy to move
– expensive

overall rating
If you’re thinking of buying a humidifier right now, this product is one of the luxury alternatives. It provides cool air to the air purifying function and supports high-performance smart functions. On the other hand, it cannot be said to be a perfect product. There is a slight buzzing noise during use.

ⓒ Emma Rowley/Foundry

The Dyson fan is one of the most recognizable products thanks to its iconic design. Bladeless fans can be used in various forms such as heating, cooling, air purification and humidification, and various combinations of these are also possible. The latest multifunctional product using this bladeless fan is the ‘Humidify + Cool Formaldehyde Air Purifier (PH04)’. It’s a bladeless air purifying fan-cum-humidifier, and, as the name suggests, one of the few air purifiers that specifically targets and removes formaldehyde from the air.

design and construction

  • full color display
  • Remote and App Control
  • Mobility not great: No wheels and quite heavy at 8.2kg/18lbs

The Humidify + Cool Formaldehyde Air Purifier is available in white, nickel and (very close to copper) gold colors. In the US, it can be purchased in nickel and (copper) gold for an additional $20. The main difference between the two colors is that the fan roof is silver instead of white.
ⓒ Emma Rowley/Foundry

If you’ve never seen a Dyson fan in person, you might not know that they come in different sizes. It is 92.3 cm high and 31 cm in diameter. Its footprint is probably slightly smaller than that of a stand-up fan, but it’s not too tall. It’s the perfect height to keep the person sitting on the couch cool. Still, it’s not quite as compact as the HP09 Hot+Cool Formaldehyde Purifier. These two appliances are very similar in design, but the humidifier model is slightly taller with a transparent water tank at the bottom.
ⓒ Emma Rowley/Foundry

It’s quite heavy at 8.2kg, and since it doesn’t have wheels, it’s likely to stay there once it’s in place. It is not easy to move from room to room and use it. It comes with a copper-colored remote control that attaches magnetically to the top of the unit, so you won’t lose it. On the front of the product is a round full-color display. By repeatedly operating it using the ‘I’ button on the remote control, you can see all measurements. A very comprehensive list displayed is:
  • air quality
  • PM 2.5 (fine dust)
  • PM10 (larger but still respirable dust)
  • HCHO (Formaldehyde)
  • VOCs (Volatile Organic Compounds – toxic and foul-smelling gases)
  • NO2 (nitrogen dioxide – typically vehicle exhaust)
  • temperature
  • humidity

Every air quality indicator has a four-color chart from green (good) to red (very bad), so you can see it at a glance. You can also use the on-screen display to check remaining filter life and Wi-Fi signal.
ⓒ Emma Rowley/Foundry

My Dyson App

The Humidify + Cool Formaldehyde air purifier can also be controlled through the MyDyson app. Beautifully designed and easy to use. In fact, it connected quickly without any problems during the test process, but results may vary depending on the strength of the Wi-Fi signal. Once connected, you can control your device from the app and see all the current air quality, air quality changes, and more. Connect it to Alexa, Siri or Google Home voice assistant and you can turn it on and off with a voice command and add it to your routine. It also provides a wealth of information on how to use the device and how to troubleshoot it.

Setting up Humidify + Cool Formaldehyde Air Purifier

The device setup process is not complicated. First, remove the tape and install the filter. Dyson setup videoIt is also good to refer to There is a little trick to removing the filter and water tank. You have to press both buttons with both hands at the same time. That is, it may be inconvenient for users with disabilities. Once you know these tricks, the water tank is easy to operate, but the filter cover is still tricky. Next, remove the tank from the bottom and fill it with water. The tank is well designed, has wheels on the bottom and a carrying handle on top to make it easy. That’s all. It’s very simple.

fan function

  • 10 speed settings
  • Oscillation
  • timer

The fan has 10 speed settings and runs quietly. Even on the highest setting, you can only hear the air rushing. No mechanical noise at all. However, I noticed that the machine makes noise during operation. The fan made a noise when it was on a low setting. The higher setting is very powerful for a personal fan thanks to Dyson’s air amplifier technology. This means that more air is drawn in from the sides and behind the fan during operation.

However, most likely this air did not pass through the purifier. This means that it may not be the best choice for people who have hay fever or similar issues and are looking for an air purifier/fan to help with their allergies. However, if you don’t want the cooling feature, there is a way to change the direction of the airflow so that it doesn’t come out of the back of the machine and blow it directly.

Fan oscillation can be turned on to cool a larger area. There’s also a timer you can set for 30 minutes or 1 hour, 2 hours, 4 hours or 8 hours, and a night mode that sets it to the quietest level and dims the display. The fan also has a breeze mode that changes the airflow to “simulate a cool, refreshing breeze.” However, during testing, I didn’t find it very useful. In practice, I’ve only met people annoyed by this mod.

air purifier function

  • Catalyst (anti-formaldehyde) No filter replacement required
  • Annual replacement of $79.99 HEPA filter
  • Air quality monitor is sensitive

The advantage of this purifier is a catalytic filter that does not need to be replaced while decomposing formaldehyde in the air. When painting or decorating, using fuel-burning appliances, or when using cleaning products and cosmetics, formaldehyde can be released into the air, which can be effectively managed. In addition, the purifier has a three-stage HEPA filter to purify the air of VOCs, smaller (PM2.5) and larger (PM10) particles. It is a comprehensive filter system that removes unpleasant air in the home.
ⓒ Emma Rowley/Foundry

However, it is not easy to compare the performance of this product with other brands of air purifiers. If you look at other air purifiers we’ve tested before, most of them show Clean Air Delivery Rate (CADR), which Dyson doesn’t use. CADR is an industry-wide measurement system that measures how long it takes to clean a certain-size room with different types of contaminants.

On the other hand, Dyson is opposed to using CADR as a performance indicator and does not actually use it. on the Dyson website more details can see All this review can do is tell you how well the device performed during the test period.

Due to Dyson’s stance on CADR, I was a bit skeptical before using this product, but when I tested it, it was pretty good. I installed it in my living room, and after making lunch in the kitchen across the hall, the display showed an increase in PM 2.5 pollution in the air and rated the air quality as poor. Although my house is not large, this is the first time that an air purifier is sensitive enough to detect the change far from the kitchen. Changes in air quality from open windows and from spray cleaners used in other rooms were also detected in detail.

ⓒ Emma Rowley/Foundry

These days, many houses have their windows closed because of the unseasonably cold weather. This doesn’t help the indoor air quality, but seeing the air quality change on the display reminded me to run the air purifier and open the windows regularly to freshen the air. This is why a great display is so valuable. If your air purifier doesn’t provide a lot of information, you may not realize when to use it.

The only issue with this product’s air-cleaning capabilities is maintenance costs. The 360° glass HEPA+Carbon filter costs $79.99 to replace, slightly more expensive than the others. Although the unit will let you know when it’s time to replace it, Dyson recommends replacing it annually. However, no matter which air purifier you buy, the filter will need to be replaced. Because the carbon layer that traps VOCs becomes saturated over time, you have no choice but to replace it with a new one.

Humidifier function

  • easy use
  • auto mode
  • Can be turned off to use only as a fan and purifier

The humidifier function is what differentiates this Dyson product from other combination fan products. There may be differences depending on the user’s location, but if the humidifier is not used all the time, you can turn off this function if necessary and use the product only as a fan and air purifier. However, if you frequently close your windows and turn on the heat (congrats if you can afford the heating bill), you may get sinus headaches, dry skin, and chapped lips—all signs that the air in your home is too dry. The ideal humidity level is 30-70%. Within that range, you just need to find a comfortable level that suits you.
ⓒ Emma Rowley/Foundry

Using the humidifier function couldn’t be easier. Fill the water tank, press a button, and you’re done. You can choose between automatic humidity or 30-70% level. However, since this product is a humidifier, not a dehumidifier, it cannot lower the humidity. Early Dyson humidifiers had problems with cleaning cycles. I was a little worried, but after using it once, a message appeared saying it needed cleaning. Citric acid is needed to clean video how toPlease refer to It took about an hour. After cleaning it up, it worked without a problem.

One thing to note is that the area where I live is particularly humid at the time of writing this review. That said, I had no major problems reaching a healthy humidity level. I wasn’t sure how quickly it would increase the humidity in very dry air conditions.

Integrates all features of Dyson fan products except heating

As of the time of writing the review, the Dyson Humidify + Cool Formaldehyde is priced between $919.99 and $939.99 (price varies depending on color), which is the highest among Dyson’s air purifiers. It is a price to pay for a special function that supports various functions and especially removes formaldehyde from the air. Except for the heating function, it provides all the functions of Dyson fan products.

Of course, there is also a way to purchase a product for each function supported by this product. The overall price may even be cheaper than this product. However, if you want at least three, and even a high-performance air quality monitor, you have to purchase four, and there is also the problem of storing each. I wonder if it will be as easy to use as this product when using multiple devices. The Dyson Humidifier + Cool Formaldehyde performed very well during our testing. The sensitivity of the air purifier was particularly impressive, and it provided extensive information on air quality through the app as well as the screen on the product.
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Source: ITWorld Korea by www.itworld.co.kr.

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