Dyson Pure HP04 – Review and Test
The Dyson Pure HP04 Hot + Cool Air Purifier, Heater + Fan air purifier is a hybrid device in action. A single device that can heat the room, serve as a fan and purify the air from 99.97% of ultrafine particles such as allergens and pollutants sounds quite impossible at first.
This device not only protects you from polluted air, but it also improves your indoor climate – in summer as well as in winter. The Dyson Pure HP04 has been extensively tested by us. In this review, you will find out whether the cutting-edge smart home air purifier was able to convince us.
The Dyson Pure HP04 Hot + Cool Air Purifier, Heater + Fan – Review in detail
We were very excited about the device and the test and could finally test the long-awaited Dyson Pure HP04.
The air quality test for fine particles
The Dyson Pure HP04 Hot + Cool Air Purifier is equipped with a 360° sealed HEPA (particulate air) filter. The HEPA filter is improved so it provides even more effective filtration of the air. With this type of filter, 99.97% of all allergens, aerosols, bacteria, and pollutants up to 0.3 microns are removed from the air.
The improved HEPA filter of the Dyson air purifier is particularly helpful for people with allergies. Since the filter captures allergens such as pollen, dust particles, and mold spores in the air. With the 350° oscillation the Dyson Pure Hot + Cool air purifier filters the air that is vacuumed in around the base of the air purifier. The HEPA filter is completely sealed. In this way, polluted air is not allowed to get back into the room.
In our test results, the Dyson Pure HP04 achieved a satisfactory result in the air purification test for fine particles. The air purifier has filtered air particles that are smaller than 10 microns by 95.05% within 90 minutes.
Dyson’s Pure Hot + Cool performed similarly well, filtering the even smaller dust (PM 2.5) particles by 94.36%. After only 25 minutes, the air quality index went from “Medium” to “Good”.
Air Particle Capture Test Conclusion
In our test for particulate air purification, the Dyson Pure HP04 performed solidly. The air purifier was able to capture 95% of polluted microparticles after 60 minutes of usage on the maximum speed setting.
According to Dyson, the air purifier has an airflow rate of 77 gallons (290 liters) per second. At the maximum setting (10) a powerful air circulation can be noticed in the room. The ventilator effect for the summer is assured.
Can the Dyson Pure Hot + Cool HP04 air purifier protect you against Corona?
According to Prather et al. in Reducing transmission of SARS-CoV-2: “Viruses can attach to other particles such as dust and pollution, which can modify the aerodynamic characteristics and increase dispersion”. Air purifiers can be a useful device to reduce the risk of infection indoors. Therefore, the air purifier must be suitable for the volume of the room and be equipped with a HEPA filter.
The HEPA H13 filter class is fine enough to filter aerosols to which Coronaviruses attach. This way, the infection risk indoors is reduced. The Dyson Pure Hot + Cool HP04 air purifier is therefore technically an anti-corona device for indoor environments up to medium size.
The Dyson Pure Hot + Cool HP04 in the odor test
Dyson’s air purifier has a filter combination of HEPA and activated carbon filter integrated to be well prepared against different air pollutants.
The activated carbon granules inside the activated carbon filters remove gases such as formaldehyde, benzene, and nitrogen dioxide from the air. Yet odors are also neutralized by the activated carbon filter.
The odor test
We burn sticks of incense completely in a 430 sqft (40m²) room. Afterward, we started the Dyson Pure Hot + Cool HP04 and let it purify the air for about 75 minutes at maximum speed. It very quickly detects changes in the air and notifies you of the changes in the app. After that, we checked the odor inside the room at 5-minute intervals.
Conclusion of the odor test
The air purifier did not perform at its best here. The Hot & Cool has needed over 35 minutes until the intense odor of the incense stick was removed by the air filter.
After about 25 minutes, the strong odor of the incense stick has strongly diminished. After 40 minutes, the odor was hardly noticeable.
Laboratory tests for the Dyson Pure HP04 Hot + Cool
As per various tests performed under laboratory conditions, air purifier models from Dyson have been performed upgradeable.
For example, in testing for Clean Air Delivery Rate by the Association of Home Appliance Manufacturers (AHAM) as well as a Chinese testing center, the air purifier achieved a result of approximately 12,1 gallons per minute (45.8 liters per minute). Compared to other air purifiers of this quality, this is a weaker performance.
In these laboratory conditions, the air purifiers are being tested for their maximum performance under extreme conditions. Dyson, the manufacturer, distances itself from this rating somewhat, as Dyson disagrees with the procedure, as the test conditions would not meet real-world conditions.
The manufacturer states that the devices are not designed for such conditions.
Moreover, Dyson points out that the air purifiers are intended for household use, as well as for use in schools or smaller offices. With appropriate conditions, Dyson air purifiers are tested by the manufacturer itself under strict controls.
Dyson’s testing procedure and an explanation of why their air purifiers should be tested in that way can be found in the following video:
At Dyson, the company tests its own devices in specially designed advanced test laboratories. Thus, the devices and the filters are tested for filtering properties, distribution of clean air in the room, and coverage of cleaning in the whole room.
Heater and the fan function of the Dyson Pure HP04 air purifier in the test
With the Dyson Pure Hot and Cool HP04, you will get some useful functions. This is because the air purifier from Dyson is the 3 in 1 device combination:
- Hot + Cool Air Purifier
For all the features, the device performs great in our opinion, and brings great features for each of the functions.
General functionality of the air purifier
The air purifier comes with a fan in the bottom that vacuums the air at a 360° angle around the base. The air then passes through the HEPA filter, followed by the activated carbon filter, and then blown back out through the oval-shaped tower.
The fan function of the Dyson Pure Hot + Cool in the test
The Dyson Pure HP04 Hot + Cool air purifier is also equipped with a super fan function. This allows you to set a rotational motion which rotates the air outlet up to an incredible 350°.
Also with warm air rotational movement is comfortable in the winter. It will fill the room with warm air quickly.
You can also adjust the air purifier to the back or front, so the airflow can be targeted even more precisely.
You can also set the airflow to indirect in “cooling mode”. So you can avoid direct airflow. In this mode, the filtered air is routed through an additional channel at the back of the Dyson air purifier’s tower, and the device creates a diffuse indirect airflow.
Conclusion of the fan function
From a technical point of view, the fan function of the Dyson Pure HP04 Hot + Cool air purifier is very well designed. The air purifier distributes the purified air while rotating on its axis (or at your desired angle, depending on the setting). Depending on the setting of the fan, you notice it more or less. But starting from setting 5 of 10, the air purifier significantly increases the air circulation in the room.
Another advantage is that with this function, the air purifier can be located practically anywhere in the room because the rotary motion of the airflow not only has a nice cooling effect but also the clean air is distributed all over the room.
Fan heater function of the Dyson Pure Hot + Cool in the test
The Dyson Pure HP04 Hot and Cool is capable of more than just cleaning the air or effectively circulating it. The device is a fan heater as well. The oval-shaped tower of the air purifier has ceramic components built into the body. These components heat the already purified air as it leaves the air purifier.
Using Dyson’s “Air Multiplier” technology, the warm air is uniformly distributed to the entire room. The heating mode only functions when the airflow direction is set to the front. The indirect mode disables the heating function.
The Dyson Pure HP04 Hot and Cool monitors the room temperature with a thermostat. This ensures that the air purifier does not waste energy unnecessarily when heating up, but shuts down the process when the desired temperature is reached.
The conclusion of the fan heater function of the Dyson air purifier
The air purifier heats the whole room air throughout the entire space, safely and quickly to the preferred temperature. With the built-in thermostat, the Dyson Pure HP04 Hot and Cool automatically turns off the fan heater function when it reaches the desired temperature. If the temperature falls below the set temperature again, the multi-function air purifier from Dyson heats the air automatically and safely on its own.
Modes of the Dyson Pure HP04 Hot + Cool air purifier
The Dyson air purifier has various features that make the device even more useful in daily use. These include the automatic modes.
- Automatic mode
- Night mode
The automatic mode of the Dyson Pure Hot + Cool air purifier
The automatic mode monitors your indoor air with 3 sensors inside the base of the air purifier. According to the measured values, the air purifier adjusts the fan speed and power automatically. We have always operated the air purifier at our home in automatic mode and were consistently satisfied with the performance.
The sensors have a high sensitivity to the type of air pollutant.
For instance, the air purifier automatically turns up the fan setting when we used spa products (such as deodorant) in the bathroom. The Dyson Pure HP04 Hot + Cool detected the air changes even in another room and reacted to the change in air quality that occurred accordingly.
The night mode of the Dyson Pure Hot + Cool air purifier.
In this mode, the air purifier monitors the air in real-time as in automatic mode and reacts accordingly to the air quality. Additionally, the device turns off the display light and turns down the fan setting as much as possible. By doing this, the device keeps the air clean as quietly and unobtrusively as possible while you are asleep.
The Dyson Pure HP04 as a smart home device – Operation, function, and app.
The Dyson air purifier can be easily controlled via an app, remote control, or a voice assistant (currently only Amazon’s Alexa and Apple’s Siri).
Control via remote control
The remote control has a permanent place on Dyson’s air purifier. It is magnetically attached to the top of the tower for practical storage. The remote control allows you to control the Dyson air purifier comfortably when you are in the room. Its remote control includes all the functions of the Dyson air purifier. And some of these functions come with a pre-configured scope. For instance, the rotating motion comes with the following pre-set angles:
Pressing the key starts the device with the rotational movement. The angle is shown on the LED display.
Hint: The angle of the oscillation can be adjusted individually with the Dyson Link app.
By pressing the information menu button, you can view the following information on the display of the air purifier:
- Indoor air quality for the last 12 seconds (current) or the last 24 hours.
- Fine dust particles (PM 2.5 or PM 10)
- Volatile organic compounds (VOC)
- Nitrogen dioxide and other oxidizing gases
- Temperature and humidity
- Remaining operating life of the filter
- Connection status to the WLAN network
The sleep timer button allows you to scroll through the time options. If you set a time, the Dyson air purifier will turn itself off after a while. In night mode, the device monitors your air quality and the temperature in the room. But the air purifier works in a very quiet fan setting (level 1-4). Also, the display lighting is dimmed to provide a more peaceful sleep.
The Dyson Link app
The Dyson Link app offers extensive information and further options for operating the Dyson Pure HP04 Hot + Cool air purifier. The Dyson Link app can be downloaded for free for Android in the Google Play Store and Apple’s iOS in the App Store.
There is a short and detailed guide for you in the app. After following it, the Dyson air purifier is connected to the app and you can start using it immediately. The Dyson Link app offers you numerous other options to operate the air purifier individually or to get details about the air quality. The following options are available with the app:
- Detailed information about indoor air quality
- Information about the air quality of your home
- Information about the filter life of the individual filter units
- You can create weekly schedules for the Dyson air purifier
- Individual control of the rotation movement
- Selection of the desired temperature
- Complete operation of the device
The user-friendliness of the app is paramount. Although there are so many options, Dyson has managed to keep the app easy to use.
Display of the air quality in the Dyson Link App
The interface for displaying the air quality is beautifully and clearly designed in the form of a house. You can get all the information about the air quality in your house from here. Using the WiFi connection, the app also displays the most recent details about the air quality in your home. Sometimes, depending on where you live, the air quality outside can be a concern, but thanks to the Dyson Pure HP04 Hot and Cool air purifier, your 4 walls are usually in the green zone.
The condition of the filters in the Dyson Link app
You can see the condition of the filters as well as the service life of the filter units in the filter management. You can also see which filters are installed in your air purifier.
Timer function and timer scheduling
The timer function is very handy in an organized and routine home. Also in the office or business, a well-designed timer is a great advantage. You can select a suitable program for each day and hour. The air purifier then does its work and turns off automatically after the timer expires.
Several different schedules can also be set for one day. For instance, you can select a desired temperature in the timer schedule and the air purifier will automatically heat your office room with clean air before you enter the room. You can also use the simple timer function in a simplified way. You can set a timer. Once the set time has elapsed, the smart air purifier turns itself off.
The app allows you to completely control the air purifier. All the functions that can also be found on the remote control are in the app’s control function. To visualize it more clearly, the individual functions are provided with a pictorial illustration of the Dyson air purifier. The rotation of the Dyson Pure HP04 Hot + Cool air purifier is only completely individualizable via the app. To do this, you need to turn the angle of the rotation movement as needed.
Conclusion for the Dyson Link App
We really found the Dyson Link app to be a joy to use during our test. According to our experience, this was one of the most user-friendly apps that we have tested so far. The animations and designs are very nicely done and look visually modern but not cluttered or intrusive.
All functions are provided in a fully functional way. The air quality data is clearly presented and the statistics are very informative. By programming timers, the air purifier can be optimally adjusted to your daily needs. During our test, we did not notice any problems with the application.
Voice control with Alexa and Siri
At the moment, voice control for the Dyson Pure Hot + Cool air purifier only works with Amazon’s Alexa or Apple’s Siri. We tested the voice control with Alexa and Siri for the functions. The Dyson air purifier can be completely controlled via voice assistants. Besides that, you can also get information about the air quality. Based on our experience, the voice control for the Dyson Pure Hot and Cool was the best we have tested so far.
Care and cleaning of the Dyson air purifier
The Dyson Pure Hot + Cool has sensitive sensors to measure the air quality. To ensure that the measurement accuracy and thus the high quality of the air purification is not affected, you need to check the sensors at regular intervals and clean them if necessary.
Also, the air inlets of the device, as well as the air outlets should be cleaned regularly. But the maintenance effort is minimal and done very quickly. There are two small slots in the base of the Dyson Pure HP04 Hot and Cool air purifier. Here are the air inlets and behind them are the 3 sensors that detect air quality.
To clean the air inlets, you can wipe the sensor inlets with a soft and dry cloth. Please pay attention to the manufacturer’s instructions for cleaning the device. Dyson recommends doing the cleaning process when changing the filter. In our experience, you should clean the air inlets of the sensors from dust every 2 months. You can simply wipe the outside of the unit with a dry or slightly damp cloth to keep the unit clean.
Design and dimensions of the Dyson Pure HP04 Hot + Cool air purifier
Dyson is known for stylish and outstanding product designs. The Dyson Pure HP04 Hot and Cool air purifier also seamlessly aligns with the company’s philosophy. The air purifier has a contemporary and sophisticated look. The oval air outlet fulfills a practical circulation of the air and is visually an eye-catcher.
A small LED display is located in the base of the air purifier in a stylish and unobtrusive design. The casing is made of premium quality plastic and looks compact and safe.
The dimensions of the air purifier are:
- Height: 30.08 inches (76.4 cm)
- Width: 9.76 inches (20.5 cm)
- Depth: 8.07 inches (13.0 cm)
Thanks to its dimensions, the air purifier is very slim compared to the “industry standard box design” and very flexible when it comes to functionality. This means that the device can be easily located almost anywhere.
Scope of Delivery
- 1x Dyson Pure HP04 Hot and Cool air purifier
- 2x Glass HEPA filters (2x 180°)
- 2x Activated Carbon Filter (2x 180°)
- 1x Remote Control (battery included)
- 1x User manual
The installation of the Dyson air purifier
After unpacking the box, a large, conspicuous yellow notice informs you that the filters are still sealed in protective film and must be attached. After you have removed the filters and attached them, all you have to do is connect the air purifier to a power source and turn it on.
The smart device will make itself heard with a gentle noise and start working. The air quality sensors of the purifier scan the surrounding air and automatically adjust the fan speed according to the level of air pollution. The Dyson air purifier requires up to 6 days to calibrate the sensors. While the process is going on, the device is more sensitive to various air pollutants.
Price and Maintenance
The Dyson Pure HP04 air purifier comes in the upper price range. In return, you get cutting-edge air purification technology and a high-efficiency 3-in-1 combo gadget. The subsequent costs normally include the electricity costs and the filter replacement.
The filter replacement depends on the usage frequency and the air conditions. The Dyson smart home helper continuously checks the performance of the filter units and calculates the remaining life of the filters.
Replacement Hepa Filter Prices for Dyson HP04 TP04 DP04:
Please note: The filter performance is not extinguished when the lifespan of the filters expires. So the manufacturer recommends that the filters should be changed to be able to guarantee normal performance.
The HEPA filter as well as the activated carbon filter cannot be cleaned independently and must be disposed of after the filter change. Dyson, specifies a service life of around 4300 hours for the filter units.
With an operating time of 8 hours per day, 2920 hours are used up after one year. The Dyson Pure Hot and Cool air purifier will notify you in time via the Dyson Link app and the device display when a filter change is approaching.
Conclusion – The Dyson Pure HP04 Hot + Cool Air Purifier, Heater + Fan
The Dyson Pure HP04 Hot and Cool air purifier is a great all-in-one device. While heating in the winter, it cools in the summer and also purifies the air and improves the air quality in the long term. The 360° filtration is highly efficient and in the fine particle test, the air purifier performed very well. The Glass HEPA filter complies with class H13 and removes 99.97% of harmful air particles up to a size of 0.3 microns. As a result, the air purifier is suitable for allergy sufferers particularly.
Thanks to its high performance, the device can provide the best air conditions at home, but also in the office and business. The air purifier uniformly circulates the air in the entire room using the Air Multiplier technology. It can be controlled via remote control, the Dyson Link app, or a voice assistant. Dyson did everything right with the Dyson Pure HP04. The only thing that turns out to be notable is the price, which is moderate. Therefore, the premium air purifier is certainly not for bargain hunters.
But in our expert’s opinion, the price for the device is fair. After all, for the price you get one of the most modern and high-quality air purifiers on the market. We were impressed by the features of the air purifier. This is why the Dyson Pure HP04 air purifier gets a buying recommendation from us.