There is no doubt that the popularity of air purifiers has been growing over the years, with people becoming increasingly aware of the importance of good air quality and, more than ever, searching for devices such as air purifiers.
The market is flooded with small air purifiers, and choosing the one that suits you best can be challenging. In this review, I will compare two compact air purifiers, the Philips Series 800 and the Xiaomi 4 Compact.
The Xiaomi 4 Compact stands out for its smart features and slightly larger room coverage. At the same time, the Philips Series 800 is defined by its modern look, minimalistic design, and user-friendly controls. The Xiaomi covers rooms up to 206 sq. ft. (19 m²), while the Philips covers rooms up to 176 sq. ft. (16 m²).
Both devices use three-stage filtration technology, don’t have ionizers, and don’t produce ozone.
Please keep reading to find out which of these two air purifiers performed better, was quieter, has more features, and, of course, is our recommendation for buying.
Our Verdict
This was a very tight battle, and it was challenging to determine which one would take the winning stand. However, details such as advanced options, smart features, and larger room coverage are the reasons I chose the Xiaomi 4 Compact as the winner in this comparison.
Although the Philips Series 800 won some tests and is slightly more affordable for maintenance, tiny details and some personal preferences were deciding factors in this comparison.
Basically, this comparison could have ended in a draw; however, in every comparison, I try to choose a winner to make the choice easier for future buyers of air purifiers. If you have any questions regarding these two air purifiers, feel free to write in the comment box below the article.
Specs: Philips Series 800 Vs Xiaomi 4 Compact
| Product Image |  |  |
| Manufacturer | Philips | XIaomi |
| Model | Series 800 | 4 Compact |
| Dimensions (inches / cm) | 14.4 x 9.8 x 9.8 inches (36.7 x 25 x 25 cm) | Φ8.6 x 14 inches (Φ22.0 x 35.5 cm) |
| Weight (pounds / kg) | 5.3 lb (2.4 kg) | 4.85 lb (2.2 kg) |
| Clean Air Delivery Rate (CADR) | 112 CFM (190 m³/h) | 135 CFM (230 m³/h) |
| Coverage (4.8 ACH)
Room Coverage Explanation: ACH is a measurement used in indoor air quality management to indicate how many times the air within a defined space is changed/moved through the filter media.
For more details, visit our ACH calculator tool. | 176 sq. ft. (16 m²) | 206 sq. ft. (19 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.5 - Average Score (67 products) 9.8 - Best Score (2 products) 2.5 - Worst Score (2 products) We use the Temtop LKC-1000S laser particle meter to test the particle removal efficiency of every air purifier. It measures PM2.5 (µg/m3), PM10 (µg/m3), Particles (per/L), and HCHO (mg/m3) in the air, and also calculates the AQI. You can read more about our testing methodology here. | ||
| Filtration Technology | Pre-filter, NanoProtect HEPA Filter, and Activated Carbon Filter | Primary Filter, Xiaomi’s High Efficiency-Filter, and Activated Carbon Filter |
| Filter Replacement Indicator | Yes | Yes |
| Filter Life | up to 12 months | 6-12 months |
| Power Consumption
Power Usage Summary: Our extensive testing of 67 air purifiers revealed the following power consumption insights:
Check out our power consumption calculator tool. | 20W | 27W |
| Operating Costs Ratings Operating Costs Ratings Score Summary: 9.1 - Average Score (67 products) 10 - Best Score (2 products) 8 - Worst Score (1 products) We measure the power usage at all speeds using an energy meter, after which we calculate how much it would cost to use the device at a particular fan speed for one month. For reference, we use an energy price of $0.12 per kWh. You can read more about our testing methodology here. | ||
| Number of Fan Speeds | 3 – Sleep Mode, Auto Mode, and Turbo Mode | 3 – Automatic Mode, Sleep Mode, and Manual Mode |
| Air Quality Sensor Air Quality Sensor Summary: Out of 67 air purifiers tested, only 31 have the air quality sensor. | Yes | Yes |
| Air Quality Indicator | Yes | Yes |
| Auto Mode Auto Mode Summary: Out of 67 air purifiers tested, only 32 have auto mode functionality. | Yes | Yes |
| Smart App Smart App Summary: Out of 67 air purifiers tested, only 20 have smart app functionality. | No | Yes |
| Voice Control Voice Control Summary: Out of 67 air purifiers tested, only 20 have voice control functionality. | No | Yes |
| Other Features | N/A | Light SensorDisplay Lock |
| Noise Level (low – high) | 41.8 – 62.8 dBA | 41.3 – 60.4 dBA |
| Noise Ratings Noise Ratings Score Summary: 9.3 - Average Score (67 products) 10 - Best Score (1 products) 8.2 - Worst Score (1 products) We use a special noise measurement tool to test the noise level of the air purifier at all speeds. We measured the noise level on the dBA scale. You can read more about our testing methodology here. | ||
| Best Suited For | Bedrooms Allergies Low Energy Cost Small Spaces | Bedrooms Small Spaces Portable Use Smart Home Integration |
| Warranty | 2-year | 1-year |
| In-Depth Review | Philips Series 800 | XIaomi 4 Compact |
| Price | Check Price on Amazon | Check Price on Amazon |
Particle Removal Test – Comparison
As I mentioned at the beginning of the article, the Xiaomi 4 Compact has slightly larger room coverage than the Philips, which is why we were able to test them in the same rooms.
We used the Temtop laser particle meter to test their performance in 194 sq. ft. (18 m²) and 320 sq. ft. (30 m²) rooms. They both worked at their maximum speeds for 60 minutes.
Particle Removal Tests - Comparison
We placed the Philips Series 800 and Xiaomi 4 Compact in two separate tests and measured their performance using the Temtop laser particle meter.
In the first test, in a 194 sq. ft. (18 m²) room, the Xiaomi 4 Compact was 1% better, with an air improvement of 94%. However, in the second test, in a much larger room of 320 sq. ft. (30 m²), both made outstanding results and improved the air quality by an impressive 91%.
This is a great result, especially considering their CADR and the size of the testing rooms.
Overall, we can say that these two air purifiers are almost identical performers and have very similar filter efficiency.
Smoke Box Test – Comparison
In this test, we measured the time it takes for an air purifier to remove all the smoke from a glass box.
We ran two separate tests with these air purifiers and measured 22 seconds for the Xiaomi 4 Compact and 33 seconds for the Philips Series 800.
Noise Level Test – Comparison
If there is one characteristic that could be used to describe both Philips and Xiaomi air purifiers, it would be their very quiet operation.
They both have two basic operating modes: sleep mode and max speed. However, they also have an auto mode that switches between different fan speeds based on the current air quality in the room.
In sleep mode, they are almost silent; the Xiaomi 4 Compact produces a sound of 41.3 dBA, while the Philips Series 800 produces a sound of 41.8 dBA, making them both ideal for use in the bedroom. Trust me, you won’t even notice they’re working!
Noise Levels - Comparison
Comparison of noise levels at all fan speeds between the Philips Series 800 and Xiaomi 4 Compact air purifiers.
The differences in noise level production become more obvious once you switch to the maximum speed. With 60.8 dBA produced, the Xiaomi 4 Compact is noticeably quieter than the Philips Series 800, which produces 62.8 dBA.
| Fan Speed | Xiaomi 4 Compact (dBA) | Philips Series 800 (dBA) |
|---|---|---|
| Max Speed | 60.4 dBA | 62.8 dBA |
| Sleep Mode | 41.3 dBA | 41.8 dBA |
Overall, I would say that the Xiaomi 4 Compact is a slightly quieter air purifier, but the difference isn’t significant enough to be a main deciding factor.
Operating Costs – Comparison
These two air purifiers are almost identical in size, which is why they have nearly identical motor power. The Philips air purifier has 20W of motor power, while the Xiaomi 4 Compact comes with a slightly higher power of 27W.
If you were to use these two air purifiers 24 hours daily for one month at their max speeds, your electric bill would rise by about $1.53 with the Philips Series 800 and by about $2.12 with the Xiaomi 4 Compact. This difference is expected due to the slightly more powerful motor of the Xiaomi.
Monthly Power Consumption Cost Comparison
Comparison of monthly power consumption costs for the Philips Series 800 and Xiaomi 4 Compact air purifiers at all fan speeds.
Another important factor is the price of filter replacement. The Xiaomi 4 Compact uses much more affordable filters, but Philips claims that its filters last exactly 12 months, which, along with the lower power consumption, makes it a bit more affordable to maintain.
| Fan Speed | Xiaomi 4 Compact (W + $/month) | Philips Series 800 (W + $/month) |
|---|---|---|
| Standby | 1.8W ($0.15) | 0W ($0) |
| Sleep Mode | 2.6W ($0.22) | 2.2W ($0.19) |
| Max Speed | 24.2W ($2.12) | 17.5W ($1.53) |
Features Overview
Comparing Philips Series 800 to a Xiaomi 4 Compact in terms of features they have wasn’t as challenging as I expected. While Philips air purifier has some basic options, Xiaomi has some additional features that can be quite practical.
Control Panel
Some manufacturers like to keep it simple, which is an example of the Philips Series 800 air purifier. Way too simple, in my opinion. Once you press the Power button on the back side of the appliance, the main button on top serves mainly to switch between operating modes and as a Filter reset indicator.
On the other hand, Xiaomi 4 Compact has more options controllable through the control board, such as the Power button, the Light adjustment button, and the Mode switch button. In addition, you will find a Child Lock, a Wi-Fi, and a Filter Reset indicator.
All these and many more options you can find as well, through Xiaomi Smart app, which will be discussed later on.
Air Quality Sensor and Air Quality Indicator
One of the first and most important features that Philips and Xiaomi have in common is the air quality sensor, accompanied by an air quality indicator. Both air purifiers have sensors located on the backside.
What differentiates the one from another is that Philips Series 800 has an ordinary yet extremely efficient air quality sensor, while Xiaomi 4 Compact has an IR (infrared) particulate matter sensor. Both sensors are collecting the data by detecting the real-time amount of PM2.5 particles. The Xiaomi 4 Compact even has a sensor that runs on its own motor, which means it collects data even when the air purifier is shut off.
Like in many other air purifiers, the air quality sensor works jointly with the air quality indicator and the auto mode. This indicator is essentially a LED light that changes color based on the pollution information provided by the sensor. You can see it straight on both devices and track color changes by yourself.
Auto Mode
One of the great advantages of having an automatic mode is the ability to turn ON the air purifier, set the auto mode, and leave it safely running while you do your daily tasks. The air purifiers Philips Series 800 and Xiaomi 4 Compact have this feature in common, which is a great deal, trust me.
Once the air purifier is set to Auto mode, it will constantly be on guard by switching operating modes and fan speeds according to the current air quality in the room.
Filter Reset Indicator
As with many other air purifiers, at some point, you will need to reset the filter within. This time varies from one device to another. However, there is always a good reminder to help you on the way. Filter reset indicator is the feature available at both Philips and Xiaomi air purifiers.
This indicator is located at the top of both devices and lights up when the time comes to replace the filter. While Xiaomi 4 Compact filter lasts between 6 and 12 months, Philips Series 800 usually lasts up to 12 months.
The extra value for the end user provided by the Xiaomi air purifier is the possibility to keep track of the filter exhaustion through the Mi Home app.
Sleep Mode
The Sleep Mode is a great feature to bear in mind if you wish to use the air purifier in your bedroom during the night. Both comparing air purifiers have this option integrated as one of the speed modes and I must admit that Philips and Xiaomi are satisfyingly silent while on this mode.
Manual Mode
If you’ve read some of my previous Xiaomi reviews, you might already assume that the Manual mode is available within Xiaomi 4 Compact, and you would be right. It is available only through the Mi Home smart app. What you need to do, is to set the desired operating mode by using the smart app, and then turn on the Manual mode on the control panel. This way, the air purifier will continuously be operating the way you set it up.
Light adjustment
One of the features that the Xiaomi 4 Compact has and the Philips Series 800 doesn’t is the light adjustment system/button. With a single button press, you can gradually adjust the brightness of the indicators on the air purifier.
All indicator lights can be dimmed completely, except the Power button, which is partially dimmable. You can find this button on the control board.
Mi Home app
Available only within the Xiaomi ecosystem, Mi Home is a universal app that any Xiaomi device can be connected to. This app provides a unique control system over all Xiaomi home appliances, from any place and at any time.
It is easy to navigate and well-designed to make your life simplified. If you need more information on how to use this App specifically for the Xiaomi 4 Compact, you can find it here.
Lock Screen
The lock screen option, or the Child lock as we usually like to call it, is an option available only within Xiaomi 4 Compact, straight through the Mi Home smart app. By activating this feature you will completely lock up the air purifier, at the same time protecting it from any kind of disturbance or interference.
Airflow
Most likely, when two comparing devices are cylindrical, you’d think they also share the way the air flows. In this particular case, you would be right. The Philips Series 800 and the Xiaomi 4 Compact have filters stored in the lower part as well as air inlets.
Both devices have air inlets arranged all over the case, whereas suction holes collect the polluted air, which later on gets purified through the filtering process and dispersed through the upper side holes.
Warranty
Fixing unexpected issues that can come up with any type of device can sometimes be a real challenge. Never underestimate the power of good warranty coverage by the manufacturer. Recognizable as it is, the Philips company provides a 2-year warranty, and you are covered worldwide. Contrary, the Xiaomi manufacturer provides only a 1-year of warranty, which I don’t think is good enough for such a fast-growing company.
Filtration Technology
The filtration process is the essential process within any air purifier system. Depending on what filters they have and of which quality, the final result will be approvable or not.
As I expected, each purifier has a very good filtration system integrated, consisting of three levels of filtration. In the first and the third place, each air purifier has a pre/primary and an activated carbon filter, respectively. The situation changes for the second filtration stage, where the Philips Series 800 has a NanoProtect HEPA filter, while the Xiaomi 4 Compact has a High-Efficiency filter (equivalent to a True HEPA filter). Let us take a closer look.
The first level, as I said, belongs to the primary line of defense. This means that in the case of Philips, as well as the Xiaomi air purifier, this filtration level is used to trap a variety of larger dust particles, hair, pet hair, pollen, dust, etc. Since this filter is meant to protect the next one in line, you should pay attention and keep it clean with occasional dusting or gentle vacuuming.
The second filtration level of Philips Series 800 belongs to a special NanoProtect HEPA filter, responsible for capturing dust particles, varied allergens, pollen, and plenty of other particles, leaving highly improved air quality.
The High-Efficiency filter taking second place in Xiaomi’s filtration process is capable of trapping 99.97% of particles as small as 0.3 microns, such as dust, pollen, smoke, and pet odors. Each producer’s air purifier has shown great performance, despite not having a True HEPA filter as their core filter. More about it in the Performance section.
For the last stage of filtration, both air purifiers have activated carbon filters. The main purpose of these filters is to neutralize all of the unpleasant odors that could come from all sources like smoke, cooking, etc. Also, the Philips and the Xiaomi air purifiers have pellet-based filters, whereas the Philips device comes with some more carbon, resulting in stronger odor removal.
How to replace filters on both of these devices?
Many users think that replacing the filters is a difficult job to do but it isn’t so. It’s usually way more simple. One of the most important things you need to remember is that the Philips series 800 nor Xiaomi 4 Compact don’t have washable filters. That means you will have to use a cleaning mop or a vacuum cleaner to maintain the functionality of your air purifier.
As I already mentioned the Xiaomi air purifier has a filter that can last between 6 and 12 months, while at the same time filter within the Philips air purifier can last up to a year.
Either way, both air purifiers have a filter reset indicator, which means you will be notified when it’s time to replace the filter.
Great review, but why noise part is not true for almost every device ? For example Xiaomi has 20 db at lowest speed and you said 41.. Every other review on Youtube etc state 20
We use a tool that measures noise levels on the dBA scale. You can read an explanation of the dBA scale on ScienceDirect.