Xiaomi Smartmi Evaporative Humidifier 2
(9 reviews)
No visible mist, no white dust on furniture: this evaporative humidifier hydrates the air gently and drops to just 34.4 dB(A) in quiet mode.
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Key features
- Tank capacity: 4 litres, up to 24h runtime
- Technology: Mist-free evaporative, no white dust
- Noise level: As low as 34.4 dB(A)
- Self-cleaning mode with automatic anti-bacteria drying
In detail: Xiaomi Smartmi Evaporative Humidifier 2, mist-free evaporative technology
The Smartmi Evaporative Humidifier 2 takes a different approach to air humidification than a typical ultrasonic model: instead of spraying a fine mist, it draws air through an ultra-thin film of water carried by rotating blades, across an exchange surface of roughly 2 m². The result is no visible mist escaping the unit, and no white limescale dust settling on furniture or a nearby TV screen, a well-known issue for ultrasonic humidifier owners in hard water areas.
Its 4 litre tank is filled from the top, with no need to remove or turn the unit upside down, and delivers up to 24 hours of runtime on low speed, about 15 hours on maximum speed, for a humidification rate of up to 260 mL/h. Evaporative technology brings another real advantage: it self-regulates naturally, as evaporation slows down once the surrounding air becomes saturated, making over-humidifying a room almost impossible compared with a poorly set ultrasonic humidifier.
On the noise front, the unit drops to 34.4 dB(A) in quiet mode, suitable for a bedroom overnight, while drawing just 8W. Control happens via the Xiaomi Home app over Wi-Fi, or directly from the touch panel on the unit, which displays humidity level and remaining water. A self-cleaning mode automatically dries the interior for up to 8 hours once the water level drops below 10%, limiting bacteria growth and odours inside a tank that otherwise stays damp permanently, a maintenance detail often overlooked on this type of product.
The compact white cylindrical body (240 x 240 x 363 mm, 4.3 kg) fits easily into a bedroom or a medium-sized living room. Its main limitation is output: more modest than a high-end ultrasonic model, it suits regular winter use better than a quick fix for a very dry room. A child lock and automatic shutoff if the tank is separated round off a serious safety sheet for a unit carrying CE marking under Directive 2014/53/EU.
Technical data
Detailed characteristics (EAN: 6970403201561)
Additional information
| Model | CJXJSQ04ZM |
|---|---|
| Colour | White |
| Dimensions | 240 x 240 x 363 mm |
| Net weight | About 4.3 kg (5.1 kg with packaging) |
| Tank capacity | 4 litres, top-fill without disassembly |
| Humidification rate | Up to 260 mL/h |
| Runtime | Up to 24h on low speed, about 15h on maximum speed |
| Technology | Evaporative: rotating blades form an ultra-thin water film (about 2 m²), accelerated by a cross-flow of air |
| Power supply | 100-240V mains adapter, 50/60Hz, unit rated 12V=, 8W |
| Noise level | As low as 34.4 dB(A) in quiet mode |
| Connectivity | Wi-Fi, Xiaomi Home / Mi Home app |
| Self-cleaning mode | Automatic drying cycle of up to 8h when the water level drops below 10% |
| Safety | Child lock, automatic shutoff if the tank is separated from the electronic base |
| Certification | CE marking (Directive 2014/53/EU), data verified by the China Testing Inspection Institute for Household Electric Appliances (report WCj-19-20420) |
Comparison
In the evaporative (mist-free) humidifier segment around £90 to £140, the Smartmi Evaporative Humidifier 2 regularly comes up against the Beurer LB 200 and the Philips Series 3000 (HU3918), two other well-known evaporative models, in searches like "Smartmi Evaporative Humidifier 2 vs Beurer LB 200". Here is how the three compare, based on published manufacturer data.
| Criterion | Smartmi Evaporative Humidifier 2 | Beurer LB 200 | Philips Series 3000 HU3918 |
|---|---|---|---|
| Tank capacity | 4 L | 3 L | 3 L |
| Humidification rate | Up to 260 mL/h | Up to 200 mL/h | Up to 300 mL/h |
| Recommended room size | Not stated by the manufacturer | Up to 30 m² | Up to 45 m² |
| Noise level | As low as 34.4 dB(A) | Not stated (dedicated night mode) | About 33 dB(A) |
| Technology | Evaporative, self-cleaning and auto-dry mode | Evaporative (cold vaporisation), filter-drying function | Evaporative NanoCloud, 99% fewer germs |
| Connectivity | Wi-Fi, Xiaomi Home app | None (physical controls) | None (physical controls) |
The Beurer LB 200 keeps things simple with a well-designed filter-drying function, but with a smaller tank and a more modest output. The Philips Series 3000 covers a larger room size and claims a significant germ reduction thanks to its NanoCloud technology, without offering remote control. The Smartmi Evaporative Humidifier 2 stands out with its larger tank, top-fill design with no disassembly needed, and Wi-Fi connectivity, a practical combination for anyone who wants to monitor and schedule their humidifier from a smartphone.
Related video
Video: Xiaomi Mijia SmartMi Evaporative Humidifier v2 - review - Published on 13 April 2020
Our tester's verdict: Christophe Delpuech
I ran this Smartmi unit in a bedroom for several weeks over winter, and what stood out most was what it doesn't do: no visible mist settling on the nightstand, no fine white limescale film on dark furniture, an issue I knew well from an older ultrasonic model. The principle is simple: air passes through a very thin water film carried by slowly rotating blades, and humidity levels regulate themselves almost automatically, with little risk of over-saturating the room. Top-filling the tank without having to remove or dismantle it is a genuine everyday convenience. The self-cleaning mode, which dries the interior once the water level drops, is reassuring for the long-term hygiene of a unit that stays damp most of the time. Two honest caveats: on maximum speed, the fan noise becomes noticeably more present than the 34.4 dB(A) quoted for quiet mode, and the humidification rate stays more modest than a high-end ultrasonic model in a large, very dry room. The Xiaomi Home app adds scheduling and remote monitoring, though it isn't essential for day-to-day use. A sound pick for anyone who values cleanliness and safety (over-humidifying is essentially impossible) over raw output.
Frequently asked questions: Xiaomi Smartmi Evaporative Humidifier 2, mist-free evaporative technology
An evaporative humidifier draws air through a water film to humidify it naturally, with no visible mist or limescale dust, and it self-regulates. An ultrasonic model sprays a fine mist, faster acting but it can leave white dust with hard water and over-humidify a room if not set correctly.
Yes, the touch panel on the unit lets you adjust speed and check the humidity level without a smartphone. The Xiaomi Home app adds remote control, scheduling and detailed monitoring, but isn't required for everyday use.
The unit uses rotating evaporation blades rather than a classic foam filter. Regular cleaning of the tank and blades is still recommended, especially in hard water areas, and the self-cleaning mode with automatic drying limits bacteria build-up between cleanings.
On low speed it drops to 34.4 dB(A), a discreet level suitable for a bedroom. On maximum speed, fan noise becomes noticeably more noticeable, a setting better suited to occasional daytime use.
This is one of the real advantages of evaporative technology: evaporation naturally slows down as the surrounding air becomes saturated with moisture, making over-humidifying very unlikely compared with a poorly set ultrasonic humidifier.
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Page published on 5 August 2026