Dyson hp04 air purifier review

Dyson hp04 review

Let me introduce you to the Dyson HP04 Pure Hot+Cool. It’s a heater, a fan, and an air purifier all in one unit and is made by Dyson, a company known for high-quality luxury appliances. The Dyson HP04 Pure Hot+Cool is an all-in-one pedestal style heater, fan, and air purifier.

Dyson’s line of Pure Hot+Cool units is available in 3 sizes and several colours. I was sent the mid-sized unit (HP04) in White/Silver which stands a little over 30 inches.

The upper part of the Dyson device is an open oval where air flows out of a groove around the front edge of the oval. Air can also be directed out the backside of the unit if you want to purify the air without cooling or heating the room.

Dyson has introduced some smart features like Smart Sensor and/or Wi-Fi capability function into the HP02, but the Dyson HP04 even has more than that. There will be not one, but three different sensors to reflect any differences in your whole indoor air quality. Other fan functions are upgraded to be the most innovative at the moment.

Design and size:

The design of the Dyson Pure Hot & Cool air purifier is similar to other compact air purifiers in the Dyson lineup.

It has an all-white body with silver accents, like at the base and as accent trim.

  • The Base: which contains the filters, air input, and adjustment controls / digital display
  • The Amplifier: which is the open vessel where clean air is evenly redistributed back into the air using bladeless Dyson technology for good airflow without the choppiness of traditional blade fans

If you’re concerned about max airflow, the Dyson Pure Hot & Cool HP04 has a max airflow of 310 litres/second.

In addition, there is also a digital screen that displays current settings, including the current indoor air quality and temperature so you can see real-time results.

The Dyson HP04 is not really designed to adjust the controls with any physical buttons on the body of the air purifier itself.

The LCD display is placed above the air intake grill. The display is a little more detailed and clear as compared to other models.  You can check the humidity level, temperature, and quality of the indoor air on the LCD display screen.


Dyson filters are warranted against original defects in materials and workmanship for a period of 12 months from the date of purchase. Filter units that must be replaced because the filter life has expired are not covered by the warranty.

  • HEPA filter: designed to capture particulate as small as 0.3 microns

Carbon filter: designed to neutralize odors like smoke, food, etc.

I tested the Dyson HP04 in the same test with the old Dyson Pure Hot+Cool, in a room of 400 square feet after 1 hour. The device still works perfectly and can remove up to 99.9% of all particles down to 0.3 microns. It is really impressive, and I believe the result can even be better next time.

The filters in the HPO4 can purify the air in your house in just two minutes. If you suffer from allergies, the HEPA filters protect you and your family from the allergens in the air. The filters are high-quality and 100% safe to use on the ozone.

Room coverage:

 In many cases, small purifiers are for treating small rooms and large purifiers are for treating large rooms. The Dyson HP04 strikes a nice balance by being large enough to treat large rooms (up to 310 litres/sec of airflow), while still being compact enough to fit in a small area.

The Dyson Pure Hot + Cool HP04 is a medium-sized air purifier that offers fan cooling or heating, which makes it a nice option for year-round usage. This purifier has an Auto Mode for a “set it and forget it” type of purification or you can customize different features like fan speed, airflow direction, and oscillation, as needed.

The maximum airflow of Dyson Pure HP04 is 83 gallons per second, equal to 665 cfm.



Another benefit of having Dyson air purifiers is their super silent operation. Noise level is measured to be only in the range of 40 to 57 decibels (dB), which is considered “silent”. Of course, this is not the best quiet air purifier, but I bet anyone can be annoying with the Dyson fan. The airflow is smooth, and the Dyson HP04 is even awarded for improved sound and quality with Quiet Mark.


Power consumption:

Dyson HP04 Power Consumption

In cooling mode, the Dyson HP04 has a power consumption of 36 to 44 watts, which is low enough for an average air purifier. The rated power for heating mode, however, is as high as 1575 watts.


  • Three-in-one power
  • Excellent fan power
  • New HEPA filter
  • Functions as a heater and cooling fan in one system
  • Automatically detects indoor air quality and adjusts appropriately
  • Can be controlled with a smartphone via the app, remote control


Quite expensive


How to control Dyson hp04?

You can control the purifier using a remote, mobile Dyson app, or using voice commands with Amazon Alexa or Google Assistant. The remote control enables you to control a few features of the purifier without the need for an application.

Some features are the following:

  •         Oscillation
  •         Power On/of
  •         Sleep mode
  •         Auto mode
  •         Night mode
  •         Set a timer

Is Dyson HPO4 maintained?

It is easy to maintain. The filtration system of the purifier is monitored internally and will alert you when you should replace them. Also, you can use the mobile app to check the status of the filters. To keep the purifier running optimally, ensure to wipe it occasionally.

Is the Dyson pure hot and cool air purifier good value?

The Dyson pure hot and cool is meant for those who want to integrate their gadgets into the overall aesthetics of their home. The additional features, such as the fan and space heater, come in handy too, Making it a jack of all trades.


The Dyson Pure Hot + Cool HP04 air purifier protects you from harmful air and improves your indoor climate – whether in summer or winter. Invisible pests such as fine dust, mold spores, bacteria and viruses lurking in the air we breathe. Therefore, poor air quality can be the cause of various respiratory diseases. In our experience, the Dyson Pure Hot + Cool HP04 achieved a good result in the air purification test for fine dust. In our test of air purification for fine dust, the Dyson Pure Hot and Cool performed well.

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