Xiaomi’s humidifier isn’t just a household appliance, it’s part of the smart home ecosystem that can automatically maintain a comfortable microclimate. But even advanced models like the Mi Smart Humidifier 2 or Xiaomi Evaporative Humidifier have some operational nuances that the manufacturer doesn’t always reveal in a brief instruction, such as why the first refueling device might not turn on, how to properly dry the filter so it doesn’t get moldy, or why smart control through the Mi Home sometimes malfunctions.
In this article, we will not only look at the basic steps (how to pour water or turn on the device), but also the hidden features that make Xiaomi humidifier really “smart”. You will learn how to set the automatic mode on the hygrometer sensor, what errors lead to breakage of the ultrasonic membrane, and why using distilled water extends the life of the device by 2-3 times compared to the tap. We also tested the humidifier with the branded concentrate Xiaomi Aroma Diffuser – the results may surprise you.
1. Preparing Xiaomi moisturizer for first use
Before the first switch on, you need to follow several mandatory steps, even if you bought a new model in the factory packaging, and neglect of preparation is the main cause of early breakdowns (according to service centers, 30% of warranty cases are associated with improper first filling).
Start by unpacking and inspecting the kit.
- 📦 The humidifier itself (body with lid)
- 💧 Removable water tank (in models Mi Smart Humidifier Pro – with a handle)
- ⚡ Power supply (note the voltage: the Chinese versions may have a 220V/50Hz, European — 230V/50Hz)
- 📄 Warranty card and brief instructions (often in several languages, but without details)
- 🔄 Filter (in ultrasonic models - damper, in evaporative - antibacterial)
Pay special attention to the filter. In the Xiaomi Mi Smart Humidifier 2 models, it is a white antibacterial impregnated cartridge that must be washed under running water before installation. CA1) The filter is denser and requires soaking in warm water for 10-15 minutes.
⚠️ Warning: Do not use the filter without washing it beforehand! In the production, it is treated with a preservative compound, which, when first turned on, can enter the air and cause respiratory irritation.
Also check the integrity of the ultrasonic membrane (in cold vapor models) and it should be flat, without scratches or white plaque, and if the membrane is damaged, the device will work louder and less efficiently.
2. How to properly pour water: errors that spoil the device
What would seem to go wrong with pouring water? But it's at this point that users make critical errors that lead to breakdowns. The rule is, never use tap water without prior preparation.
Tap water contains calcium and magnesium salts that settle on the ultrasonic membrane and inner walls as white coating, and over time, this leads to:
- 🔊 Increased noise level (membrane vibrates unevenly)
- ⚡ Overheating of the control board (plaque acts as a heat insulator)
- 💧 Decreased productivity (vaporization falls by 30-40%)
The best water options for Xiaomi:
| Type of water | Pluses | Cons | Suitable for models |
|---|---|---|---|
| Distilled | No plaque, maximum service life of the membrane | Expensive, you need to buy separately | All ultrasonic (Mi Smart Humidifier) 2/Pro) |
| Filtered (reverse osmosis) | Cheaper distilled, almost no salts | May contain microorganisms | All models. |
| Boiled. | Kills bacteria, partially removes salts | It is still scalable, requires frequent cleaning. | Evaporative Humidifier (Evaporative Humidifier) |
| Bottled (from the store) | Convenient, salt in a minimum amount | Expensive with regular use | All models. |
Refuelling process:
- Disconnect the device from the network (even if it is switched off by a button).
- Remove the top cover by turning it counterclockwise (the Mi Smart Humidifier Pro has a magnet-restricted cover).
- Remove the water tank and rinse it with warm water with a mild detergent (no abrasives!).
- Pour water into the tank before mark MAX (Do not add "on the reserve" - this increases the load on the pump).
- Then, put the rod back on the back, and make sure it sits tightly on the base (there should be a click).
Make sure the filter is cleaned and installed|Check the water level (not higher) MAX)|Wipe the contacts of the tank from moisture|Connect the power supply to the socket, not to USB-hub-->
3.Umidifier control: buttons, Mi Home and voice commands
Xiaomi offers three ways to control the humidifier: mechanical (buttons on the body), through the Mi Home app and voice (if the device is integrated into the ecosystem with Xiaomi Smart Speaker).
Mechanical control (relevant for all models):
- 🔘 Power button: one press - on / off, hold 3 seconds - reset settings.
- 🌫️ Fog button: short press switches intensity (low/medium/high), retention activates night mode (muffled light, minimal noise).
- ⏱️ Timer: press once for 1 hour, twice for 4 hours, three times for 8 hours (Mi Smart Humidifier Pro has a timer that is only configured in the app).
To connect to Mi Home:
- Install the Mi Home app (available for Android and iOS).
- Create an account or log in to an existing one (be sure to link to the region "Russia" or "Europe", otherwise there may be problems with servers).
- Press + → Add the device → Air humidifier.
- Hold the power button on the humidifier for 5 seconds until the indicator starts flashing orange.
- Confirm the connection in the application and wait for synchronization (can take up to 2 minutes).
After connecting to Mi Home, advanced features will be available:
- 📊 Real-time humidity graphic (if the Xiaomi Temperature and Humidity Sensor is connected).
- 🔄 Automatic mode: the humidifier will maintain a predetermined humidity level (e.g., 50–60%).
- 🎵 Musical accompaniment: Mi Smart Humidifier 2 has a function "Soothing sounds" (noise of rain, ocean).
- 🔗 Integration with other devices: for example, the humidifier can be included with the air conditioner Xiaomi.
⚠️ Warning: If the humidifier is not connected to the Mi Home, check: The device's firmware version (update via the app if available). Distance to the router (should be no more than 10 meters without obstacles). Turn off the “Client Isolation” function in the control panel.
Voice control works through Alice (Yandex), Google Assistant or Siri (via Mi Home).
- "Alice, turn the humidifier on in the nursery to maximum power."
- "OK Google, set the living room humidity to 55%."
- "Siri, turn off the humidifier in 2 hours."
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If the humidifier does not respond to voice commands, check in Mi Home if the option "Voice Assistant" is enabled in the device settings. Also make sure that your Mi Home account is tied to the same region as the voice assistant account (for example, Yandex and Mi Home must be registered in Russia).
4 Cleaning and care: how to avoid mold and plaque
Xiaomi's humidifier requires regular cleaning -- not just a recommendation, but a necessity. Studies have shown that a dirty humidifier can produce up to 10 species of bacteria and fungi in a week, which are then sprayed into the air, especially dangerous for allergic people and children.
Minimum cleaning frequency:
- 💦 Daily: drain the remaining water if you do not use the appliance (standing water is the perfect environment for bacteria).
- 🧼 Once every 3 days: wash the tank and base with a soft sponge with soap solution.
- 🧽 Once a week: Deep cleaning with vinegar or citric acid (see instructions below).
- 🔄 Once a month: replacement or washing of the filter (in evaporative models - boiling in water with soda).
Step-by-step instructions for deep cleaning:
- Turn off the humidifier from the network and drain the water.
- Prepare the solution: 1 liter of warm water + 2 tbsp. spoonfuls of vinegar (9%) or 1 tbsp. spoonful of citric acid.
- Pour the solution into the tank and base (if possible) for 30 to 60 minutes. For ultrasonic models, you can turn on the device for 5 minutes in this solution, vibration will help remove the plaque from the membrane.
- Wash all parts thoroughly under running water, paying attention to the corners and joints.
- Dry the parts in the air (do not use a hair dryer or microwave!).
For disinfection, you can use specialized tools, for example, Xiaomi Humidifier Cleaner (article) ZNCJJ01JM). It removes up to 99.9% of bacteria and does not damage plastic. The alternative is chlorhexidine (0.05% solution), but it must be thoroughly flushed.
⚠️ Warning: Never use for cleaning: Abrasive powders (scratching membrane and plastic) Hard brushes (damaging the antibacterial coating of the filter) Bleach in its pure form (corrodes seals)
What happens if you don't clean the moisturiser?
5 Common Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes that shorten the life of the humidifier or reduce its effectiveness.
| Mistake. | Effects of consequences | How to fix it |
|---|---|---|
| Using aromatic oils is not for humidifiers | Membrane damage, filter clogging, toxic fumes | Use only special concentrates (e.g. Xiaomi Aroma Diffuser) |
| Installation of a humidifier on the floor | Low efficiency (steam settles on the floor), risk of short circuit | Put on a hill (table, bedside table) at a height of 0.5-1 m |
| Water supply during work | Overflow, level sensor breakdown, leaks | Always turn off the device before the watering |
| Use in a room with a temperature below 15°C | Condensation on furniture, low productivity | Keep the room temperature 18-25°C |
And the thing about flavoring is that many people add essential oils or herbal decoctions to the water, but this is strictly forbidden for ultrasonic humidifiers, and the oils form a film on a membrane that:
- 🔇 Reduces the amplitude of vibrations (vaporization drops by 50%)
- 🔥 Overheats the membrane (can fail in 1-2 weeks)
- 🤧 It causes irritation of the lungs (fine particles of oils are dangerous when inhaled)
If you want aromatherapy, use special diffusers (such as the Xiaomi Smartmi Aroma Diffuser) or add a few drops of oil to the outside of the filter (not in water!).
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Xiaomi ultrasonic humidifiers are not designed to work with oils! for flavoring, use only branded cartridges or individual diffusers.
6.Smart Features: Automated Mode, Schedule, and Integration with Other Devices
The main advantage of Xiaomi humidifiers is their "smart" capabilities, which turn the device from a simple steam generator into part of the climate system.
Automatic mode on the humidity sensor
If you have a Xiaomi Temperature and Humidity Sensor 2 (or other compatible), the humidifier can automatically maintain a predetermined humidity level.
- Connect both devices to the Mi Home.
- Create a script: Automation → Add → Condition: Humidity < 50% → Action: Insert the humidifier at an average power.
- Add the second condition: If humidity > 55% → Turn off the humidifier.
Schedule of work
For example, you can adjust the humidifier so that it:
- 🌅 It was activated 30 minutes before you woke up (synchronization with Mi Band)
- 🏠 Worked at maximum power when you are not at home (if you have pets)
- 🌙 Turned off at night when the humidity naturally rises
Integration with other devices
Examples of useful scenarios:
- 🌡️ If the room temperature is above 25°C (according to Xiaomi Thermometer) → humidifier.
- 🚪 If the window is open (Xiaomi sensor) Door/Window Sensor) → Turn off the humidifier (electricity savings).
- 💤 If you go to bed (according to Mi Band) → humidify.
To create scenarios, use the Automation section in Mi Home or the Xiaomi Home Automation app (for advanced users).
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If the humidifier is not responding to automation, check if the remote control option is enabled in its settings. Also make sure that the device is connected to the same hub (gateway) as the other sensors.
7. Possible malfunctions and ways of their elimination
Even if properly operated, Xiaomi’s humidifier can fail, and consider the typical malfunctions and how to diagnose them:
| Symptoms. | Possible cause | Decision |
|---|---|---|
| It doesn't turn on, the indicator doesn't burn. | Problems with the power supply or charge | Check the socket, cable, try another power supply (should be) 12V/1.5A) |
| Turns on, but doesn't spray steam | The membrane clogged or no water | Wash the membrane in vinegar, check the water level |
| The strength of the pair is weak, despite the maximum mode | Membrane plaque or clogged filter | Clean the membrane and filter (see section 4) |
| The humidifier works, but the humidity does not rise. | Incorrect location or leakage of steam | Move the appliance to the center of the room, check the tank seals |
| There was a bad smell. | Bacteria or mold in the tank | Conduct a deep cleaning with a disinfectant |
If the humidifier gives an error on the screen (in models with a display), decoding the codes:
- E1 — No water in the tank (pump water and restart the appliance).
- E2 — The tank is incorrectly installed (remove and install again).
- E3 — Membrane problem (requires cleaning or replacement).
- E4 — Humidity sensor error (reset the device).
For resetting settings to factory:
- Turn off the humidifier.
- Hold the power button for 10 seconds.
- Connect to the network - the device should flash orange and reboot.
⚠️ Note: If after cleaning and resetting error E3 It's not going away, it's probably the ultrasonic membrane that's damaged, so if you do that, you can go to the service center, and you can have a self-repair that can short circuit.
8. Model comparison: which Xiaomi humidifier to choose
Xiaomi’s humidifier range includes several models with different operating principles, and here is a comparison table to help you choose:
| Model | Type | Volume of tank | Area of coverage | Noise level | Features |
|---|---|---|---|---|---|
| Mi Smart Humidifier 2 | Ultrasonic. | 4.5 litre | up to 28 m2 | 38 dB | Smart control, display, aromacapsule |
| Mi Smart Humidifier Pro | Ultrasonic. | 5.5 litre | up to 36 m2 | 34 dB | Built-in hygrometer, night mode, high performance |
| Xiaomi Evaporative Humidifier CA1 | Evaporative | 6 l | up to 40 m2 | 30 dB | Natural hydration, antibacterial filter, low power consumption |
| Xiaomi Smartmi Evaporative Humidifier 2 | Evaporative | 4l | up to 30 m2 | 28 dB | Compact, silent, suitable for bedrooms |
What type of humidifier to choose?
- 💧 Ultrasonic (Mi Smart Humidifier): quick result, compact, but requires distilled water and regular cleaning.
- 🌿 Evaporative Humidifier: Natural hydration, less bacteria, but noisier and takes up more space.
For a child's room or bedroom, it is better to choose an evaporative model - it is quieter and safer (there is no risk of overhydration).
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Xiaomi’s evaporative humidifiers don’t require distilled water and break less often, but their performance depends on air temperature (when you’re at the top of the table). <18°C efficiency drops 40%).