Great mix of features and functionality

March 31, 2022 0 Comments

Dyson Pure Hot + Cool Air Purifier was launched in India in February. Priced at Rs 54,900, the Air Purifier is not only based on the features and capabilities of its predecessors but also has some new techniques on its sleeve. As the name implies, Dyson Hot + Cool Air Purifier is not only capable of purifying the air, it can also conduct warm air inside a room, thanks to a heating element that it is equipped with. However, will the new features increase the functionality of the device or will it hinder its refining capacity?


When measuring air pollution reduction, performance is most important. Although we say that features like IoT connections, sensors and a digital display enhance the quality of a device, its first and foremost function is to purify the air. We have seen before that Dyson air purifiers can perform well in moderate pollution levels when PM2.5 levels are between 150-250 µg / m3 and for Dyson Pure Hot + Cool air purifier, we have tested it for a long time. Its air filtering efficiency retains over time.

We operated the air purifier in our three test rooms for 45 minutes and randomly referred to PM2.5 and PM10 levels before, after and during. Note that the particle dimensions we measured are represented in µm / m3 and the lower these readings, the better the air quality. Before the test began in room 1, the PM2.5, PM10, and overall AQI (Air Quality Index) readings were 174, 198, and 224, respectively. After running the air purifier for 45 minutes, we measured the readings and found that Dyson Pure Hot + Cool was able to bring down the levels of PM2.5 to 52, PM10 to 48 and overall AQI to 141. In the limited time experiment we performed, the air purifier did an admirable job of reducing particle levels in room 1.

Coming to the second room, we recorded PM2.5 levels 184, PM10 211 and AQI 234. Note that these levels are still above the allowable limit in India, which is set at 60 µg / m3. PM2.5 and 100 g / m3 for PM10 particles. After 45 minutes of testing, Dyson was able to lower the Pure Hot + Cool PM2.5 levels to 45, PM10 to 53, and overall AQI to 124. In this case, too, the air purifier has successfully lowered the particulate matter to an acceptable level. Limits

As mentioned earlier, Room 3 is one of our conference rooms that is well maintained. The PM2.5 and PM10 levels were already below the 58 and 44 levels, respectively, and were recorded at AQI 151, which falls within the moderately contaminated range. After a 45-minute runtime, PM2.5, PM10 and AQI levels were recorded at 37, 30 and 104, respectively. Reducing low-level pollutants may already be difficult for air purifiers, but Dyson Pure Hot + Cool has performed well in this area as well.

Overall, after testing the Dyson Pure Hot + Cool Air Purifier at moderate air pollution levels, we found that its air circulation and purification capacity are at the point. Also, the extended duration of our test lasted more than two months and during this time, we did not record any drop in the purification capacity of the air purifier. However, it is recommended to dust the module on the bottom of the device which keeps the filters in place once in a few weeks as it traps most of the dust and large particles.

Construction and design

We already thank Dyson for coming up with a really good air purifier design. The Dyson Pure Hot + Cool Air Purifier also has a tower air purifier design, similar to other siblings like the Dyson Pure Cool Air Purifier. Features like powered air vents and good air circulation are enabled by the unique design of the device, which is usually missing in other air purifiers. It is made of glossy ABS plastic which is not only strong but also gives a smooth and stylish look. The Dyson Pure Hot + Cool Air Purifier takes up minimal space and is a must-have in a home rather than blending in with the background.

The Dyson Pure Hot + Cool Air Purifier absorbs air from the circular module at the bottom, where the air filter is located, and expels it from the top tower. However, since the bladeless top of the purifier projects air through a thin slit, the air is pushed out with sufficient force, enabling the device to double like a fan. Although it should be noted that the air blown outside is not cold, it can be warm if you use the heating feature.

Although the build and design of the new Dyson Pure Hot + Cool Air Purifier is almost the same as Dyson’s previous tower-styled air purifier, the company has now added an additional design feature. The new air purifier can be tilted forward and backward so that it can adjust the angle at which the air is flowing. It only works when the device is placed on the floor but when it is raised on the table. The air purifier can swing 350 degrees and comes with an optional, wide aperture at the back. Pure air is operated from this secondary aperture when the purifier is operated in “diffused mode” so that it does not feel too cold in winter.

Filters and sensors

Dyson Pure Hot + Cool is equipped with a circular H-13 HEPA filter with an activated carbon filter. Made using nine-meter pleated borosilicate fibers, the HEPA filter is said to capture contaminants as small as 0.1 microns. Additional filters, including activated carbon, aim to eliminate harmful gases such as benzene, NO2, formaldehyde, among others. Carbon crystals used in carbon filters are treated with oxygen to make them more porous, which helps in better absorption of gases and removal of odors.

The filters are housed inside a circular housing on the bottom panel of the Dyson Pure Hot + Cool Air Purifier. Although both HEPA and circular carbon filters are circular, they are isolated, which means they are more likely to emit impure air. However, Dyson claims that there is a complete sealing system that prevents this from happening. Filters are expected to last about six to eight months, depending on the air pollution in the area where you live and how long you run the air purifier. Filters are easy to replace and don’t really require much skill and replacement for each filter can cost you back up to Rs 2,490.

For the sensors, the Dyson Pure Hot + Cool is equipped with three sensors, which not only display the air quality metrics but also enable the device to operate automatically. There is a humidity and temperature sensor with a laser-based particle sensor that monitors PM2.5 and PM10 particles in the air. A VOC sensor detects harmful gases in the air.

The sensors create data that is displayed on the air purifier’s LCD screen and can also be accessed through the Dyson app. These sensors also kick in when the device is switched to automatic mode. Going by the data generated by the sensor, the air purifier automatically adjusts its speed. Also, the temperature sensor is used to raise the temperature of a room to the desired level, which can be set by the user.

Air heating

With the Pure Hot + Cool Air Purifier, Dyson has added a great new feature to its lineup. The device is equipped with a ceramic heating plate, which heats the pure air before pushing. The new option is a welcome addition because it works as intended and the device dissipates hot air surprisingly quickly. When someone sets their desired temperature, the air purifier starts expelling hot air until it reaches the target temperature and shuts off automatically. The air heating feature is really a great addition, especially in winter, because the air purifier doubles as a heater.

However, care must be taken to ensure that children are nowhere near the device when using the device to heat the air in a room. After using the heating mode for 10 minutes, we used a heatgun to find out if the direction of the air purifier could rise to 76 degrees Celsius. Additionally, we recorded a maximum temperature of 104 degrees for hot plates located near the front aperture of the air purifier from which air is expelled. If you have children at home, you need to be careful about this.

Control and app connection

The Dyson Pure Hot + Cool comes with an IR remote that enables you to control the functions of the air purifier. The compact, cleanly designed remote is well made and has touch buttons with good responsiveness. There are standard buttons to turn the device on or off and to increase or decrease its speed. There are also buttons for raising and lowering the temperature, which does not mean that the exhaust air is being heated to the set level. This is like setting a thermostat where the device continues to expel hot air until the ambient temperature of the room reaches the level set by the user. The remote can be magnetically attached to the top of the air purifier loop and does not slip.

The remote can also enable oscillation, night mode and a diffused air purification feature. In night mode, the speed of the air purifier decreases and the front LCD screen also fades. There is also an automatic mode, which works as described in the Filters and Sensors section. The info button is a great way to go through data captured by an air purifier sensor like the current AQI or AQI level logged in the last 24 hours. Also, the display of the purifier shows PM2.5, PM10, VOC and NO2 levels. However, the exact values ​​are shown for PM 2.5 and PM 10 particles only.

In this world of connected living, there is an app for everything and it means that Dyson Pure Hot + Cool Air Purifier can be controlled through one app. IoT connectivity in an air purifier makes a lot of sense because one can turn on the device before it reaches their home and turn it off remotely if necessary. Pairing up the Dyson Air Purifier with the Dyson Link app is quite easy and once done, one can not only control the Air Purifier from their phone but also access a wide range of statistics.

The Dyson Pure Hot + Cool connects to local WiFi and the app has all the options you would find in a remote control of a device. In addition to turning on and off the air purifier, one can enable speed, oscillation angle, temperature, slip mode, auto mode or diffuse mode. The app also enables an additional scheduling feature so anyone can set when the device is on or off. The filter life of the air purifier is shown in percent and it can be checked in the app. As mentioned earlier, extensive sensor data can be accessed through apps like PM2.5, PM10, Temperature, Humidity with VOC and NO2 contaminants.

The last row

The Dyson Pure Hot + Cool offers some additional features and comparatively better air purification than the company’s previous air purifiers. The device comes with great IoT capabilities, enabling a user to manage and test it from anywhere in the world. In addition, at this time, there is a heating feature which is really easy and a very welcome addition. At Rs 54,900, the price seems to be too high for the features it offers However, the company says it is targeting a niche market and it certainly seems so. The Dyson Pure Hot + Cool is a no brainer for those who want to show off a future-looking engineering part of their home that is a good air purifier.

However, as India is a price sensitive market, it would be inappropriate to say that there is no alternative. Those who want better air purifiers in the range of Rs 30,000 can check out the Blueair Classic 280i (review). The BlueAir Air Purifier performs well, has IoT enabled, relatively inexpensive filters and, as we found in our review, is really silent. Then, last year’s Digit Zero 1 award winner in the air purifier category, Sharp FP-J60M (Review). While not IoT enabled, the Air Purifier offers really powerful air purification and it takes our experiments forward at a price of Rs 35,000.

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