Philips and Xiaomi are globally recognized brands that offer a wide variety of products. In this article, I will compare two very different air purifiers: the Philips Series 800 and the Xiaomi Mi 3H.
The Philips Series 800 is a small, cylindrical air purifier with a few advanced options, intended for rooms up to 176 sq. ft. (16 m²). In contrast, the Xiaomi Mi 3H is a much larger air purifier with many advanced options, which covers rooms up to 484 sq. ft. (45 m²).
Both devices feature three-stage filtration technology, but with one crucial difference: only the Xiaomi uses a True HEPA filter. In my opinion, this is why the Xiaomi performed better in the performance tests.
Our Verdict
Frankly, I knew which air purifier would win from the very beginning of this comparison. The reason is that I have used both in my place for a long time, and even without precise tests, I could easily determine which is the better choice.
However, based on the tests and detailed analysis of these two air purifiers, I picked the Xiaomi Mi 3H as the better buying option compared to the Philips Series 800. There are several reasons for this decision, which include better performance, a larger and longer-lasting filter, much larger room coverage (higher CADR), and more smart options.
All in all, these are two high-quality air purifiers, and I’m sure either would satisfy your needs.
If you have any questions regarding these two devices, please comment in the comment box below the article.
Specs: Philips Series 800 Vs Xiaomi Mi 3H
| Product Image |  |  |
| Manufacturer | Philips | Xiaomi |
| Model | Series 800 | Mi 3H |
| Dimensions (inches / cm) | 14.4 x 9.8 x 9.8 inches (36.7 x 25 x 25 cm) | 9.5 x 9.5 x 20.5 inches (24 x 24 x 52 cm) |
| Weight (pounds / kg) | 5.3 lb (2.4 kg) | 10.6 lb (4.8 kg) |
| Clean Air Delivery Rate (CADR) | 112 CFM (190 m³/h) | 223 CFM (380 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) | 484 sq. ft. (45 m²) |
| Performance Ratings Performance Ratings Score Summary: 8.6 - Average Score (67 products) 9.8 - Best Score (2 products) 2.5 - Worst Score (1 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 | Pre-filter, True HEPA and Active 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 | 38W |
| 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 | 6 – Automatic Mode, Sleep Mode, Speed 1, Speed 2, Speed 3, 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 | Temperature and HumidityParental ControlsDisplay Off |
| Noise Level (low – high) | 41.8 – 62.8 dBA | 40.9 – 65.4 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 | Living Rooms Kitchens Offices Allergies Large Spaces Smart Home Integration |
| Warranty | 2-year | 1-year |
| In-Depth Review | Philips Series 800 | Xiaomi Mi 3H |
| Price | Check Price on Amazon | Check Price on Amazon |
Performance Test – Comparison
Let’s compare their performance and efficiency in airborne particle removal. But, before we move on to the results, it’s important to note that the Xiaomi covers rooms nearly three times larger than the Philips, so we tested them in two different rooms as well as in one room of the same size.
Particle Removal Tests - Comparison
We placed the Philips Series 800 and Xiaomi 3H in two separate tests and measured their performance using the Temtop laser particle meter.
In the first test, conducted in a 320 sq. ft. (30 m²) room, both performed admirably. The Xiaomi Mi 3H improved the air quality by 95%, while the Philips Series 800 improved it by 91%. The Xiaomi managed to reduce the PM2.5 particulate matter from 96.5 to 5.1 µg/m³, while the Philips reduced it from 101.9 to 8.4 µg/m³.
In addition to this test, we also tested them in two different-sized rooms. The Xiaomi Mi 3H improved the air quality by about 90% in a 560 sq. ft. (52 m²) room, while the Philips Series 800 improved the air quality by about 93% in a 194 sq. ft. (18 m²) room.
It’s clear that the Xiaomi Mi 3H produced better results in all the tests, making it a more efficient and better-performing device. However, the Philips Series 800 would be a great option for small rooms such as bedrooms, kids’ rooms, and similar spaces.
Smoke Box Test – Comparison
You may think that a more realistic comparison would be between the Philips Series 800 and the Xiaomi 4 Compact (I have already done it), but since many people requested this one, I had to do it.
The fact that the Xiaomi Mi 3H is a much larger air purifier with a higher CADR and larger filters is why it performed much better in the smoke test.
The Xiaomi needed only 15 seconds to remove all the smoke from the box, which is among the best results of all the air purifiers we tested.
On the other hand, the Philips Series 800 needed 33 seconds, which is much slower but still better than average (based on all air purifiers we tested).
All in all, the Xiaomi Mi 3H was much better in the smoke removal test.
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