I tested the Xiaomi 4 Compact air purifier some time ago, which I will compare to the Xiaomi Mi 3H in this article. It is an absolute pleasure to compare Xiaomi’s fourth-generation air purifier with the legendary Xiaomi Mi 3H.
In essence, these are two slightly different air purifiers, especially if we compare their room coverage. The Xiaomi 4 Compact covers small rooms of up to 206 sq. ft., while the Xiaomi Mi 3H has almost double the coverage of the 4 Compact, covering rooms of up to 484 sq. ft.
When we talk about features, both devices are smart, have plenty of advanced features, and there is almost no difference between them. Both air purifiers have an air quality sensor, an air quality indicator and can be connected to the Mi Home App. As for the filtration technology, there is also not much difference because both use 3-stage filtration technology. The only significant difference in filtration is the slightly larger size of the Xiaomi Mi 3H filter.
Although these two air purifiers are intended for rooms of different dimensions, this does not mean that the Xiaomi 4 Compact can’t surprise in the tests and turn out to be a better choice for purchase. All in all, keep reading to find out which of these two is my recommendation.
Xiaomi 4 Compact Vs Mi 3H Specifications
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| Manufacturer | Xiaomi | Xiaomi |
| Model | Mi 3H | Compact 4 |
| Dimensions | 9.5 x 9.5 x 20.5 inches (24 x 24 x 52 cm) | Φ8.6 x 14 inches (Φ22.0 x 35.5 cm) |
| Room Coverage (4.8 ACH) | 484 sq. ft. (45 m2) | 206 sq. ft. |
| Performance Ratings | ||
| Filtration Technology | Pre-filter, True HEPA and Activated Carbon Filter | Primary Filter, Xiaomi’s High Efficiency-Filter, and Activated Carbon Filter |
| Filter Replacement Indicator | Yes | Yes |
| Filter Longevity | 6-12 months | 6-12 months |
| Power | 38W | 27W |
| Operating Costs Ratings | ||
| Working Modes | 6 – Automatic Mode, Sleep Mode, Speed 1, Speed 2, Speed 3, and Manual Mode | 3 – Automatic Mode, Sleep Mode, and Manual Mode |
| Air Quality Sensor | Yes | Yes |
| Air Quality Indicator | Yes | Yes |
| Auto Mode | Yes | Yes |
| Smart App | Yes | Yes |
| Voice Control | Yes | Yes |
| Noise Levels | 40.9 – 65.4 dBA | 41.3 – 60.4 dBA |
| Noise Ratings | ||
| Warranty | 1-year | 1-year |
| In-Depth Review | Xiaomi Mi 3H | Xiaomi 4 Compact |
| Price | Check Price on Amazon | Check Price on Amazon |
Xiaomi 4 Compact Vs Xiaomi Mi 3H – Video Comparison
Which One Is Better?
This fight may not be fair because the size and strength of the air purifier are one of the most important specifications, and in this situation, they favor the Mi 3H. Perhaps this is also why the Xiaomi Mi 3H achieved slightly better results in performance tests, has more working modes, and is quieter when working at the lowest speed.
In my opinion, the Xiaomi Mi 3H is a better choice because it is stronger, has larger filters, did better in performance tests, and has slightly more advanced features.
Don’t get me wrong, the Xiaomi 4 Compact is an almost equally excellent air purifier, but more is needed to beat the Mi 3H. The situation in which I would instead choose the Xiaomi Mi 4 Compact is if I would use the air purifier primarily in the bedroom, in the office, or a similar smaller room.
If you have questions regarding these two Xiaomi air purifiers, please comment in the comment box below.
