How to set up a Xiaomi breezer MJFXJ 150: Complete instruction from unpacking to smart control

What is Xiaomi Breezer? MJFXJ 150 and why you need it in your home

Xiaomi Breeze MJFXJ 150 is a compact device for supply ventilation, which not only provides fresh air, but also cleans it from dust, allergens and harmful impurities. Unlike traditional air ventilators, this device works silently (noise level up to 22 dB), supports air heating in winter and integrates into the Mi Home ecosystem for remote control.

Model MJFXJ 150 is designed for rooms up to 15-20 m2 and is equipped with a three-stage filtration system: HEPA H11 (It traps 99.9% of particles of 0.3 μm size, a carbon filter (removes odors) and a pre-filter (protection against large dust), a feature of the device is the automatic adjustment of the fan speed depending on the air quality (sensors). CO₂ and PM2.5 built-in).

In this instruction, we will examine:

📦 How to properly unpack and install a breezer on the wall
⚙️ Step-by-step setting up through the Mi Home app (including account binding)
🌡️ Optimal operating modes for different seasons
⚠️ Typical mistakes and how to avoid them (for example, why the breezer does not warm the air in winter)

Preparation for installation: what is included in the kit and what tools will be needed

Before installation, check the configuration of the Xiaomi breezer MJFXJ 150. The box should have:

📋 Breezer itself with a filter installed HEPA H11
🔌 Power adapter (220V, 50 Hz)
🔧 Fixing set (dowels, screws, template for marking)
📄 Instructions in Chinese (Russian version not included!)
🔄 Air duct with external grille (length 1 m, if necessary, you can shorten the)

In addition, prepare the tools:

🔨 Perforator with a drill diameter of 6-8 mm (for fastening the inner unit)
📏 Roulette and level (to keep the breeze hanging exactly)
🖌️ Marking pencil
🔧 Screwdriver cross (for fixing the external grille)

⚠️ Warning: If the wall is covered with drywall, use special butterfly dowels. Standard mounts from the kit will not withstand the weight of the device (about 3.5 kg).

📊 Where do you plan to install a breeze?

In the bedroom.

In the nursery

In the office.

Kitchen.

In another room.

Step-by-step installation of the breeze on the wall: marking, drilling, installation

Installation of Xiaomi Breezer MJFXJ 150 consists of 4 steps. Follow the instructions to avoid errors:

Marking: Apply the template from the kit to the wall at a height of 1.8-2 m from the floor. Mark with a pencil the places for mountings and holes under the duct. Make sure that there is no electrical wiring nearby (use a metal detector).
Drilling: drill a duct hole with a diameter of 100 mm with a slope of 3-5° Down (to avoid rainfall) Use a 6mm drill for the fastenings.
Install the duct. Put the pipe in the hole, fix the outer lattice with screws. Close the cracks with mounting foam (do not use silicone - it will crack over time!).
Install the breeze. Set the inner unit on the dowel, connect the power. Make sure there is a 1 to 2 cm gap between the wall and the device for air circulation.

After installation, check the tightness:

🌬️ Hold a piece of paper to the outer grille – it should attract when the breezer is turned on.
💧 Pour water on the outer grille (imitation of rain) - moisture should not penetrate inside.

☑️ Pre-introducement check

The air duct hole is sealedFilters installed correctlyBreezer is fixed without skewing.Power adapter connected to socket

Done: 0 / 4

Connecting to Mi Home: Device binding and setting up automatic scripts

Xiaomi Breeze MJFXJ The 150 only works through the Mi Home app (available for Android and iOS:

Download Mi Home from the App Store or Google Play.
Sign up for an account (attach to phone number or email). Importantly, the region in the profile should be Russia or China (for other regions, the breezer may not appear in the list of devices).
Turn the breeze into the socket. Press and hold the power button for 5 seconds until the Wi-Fi indicator (blue) flashes.
In the app, go to Devices → Add the device → Breather, choose a model. MJFXJ 150 and follow the instructions.

After the connection, we recommend setting up automation:

🌙 Night mode: fan speed level 1, heating is turned off (activated on schedule from 23:00 to 7:00).
🏠 Smart scenario: the breezer turns on when the window is opened (you need a Xiaomi sensor) Door/Window Sensor).
🌡️ Adaptive mode: fan speed is adjusted automatically according to sensor data CO₂ (target level: 800–1000 ppm).

💡

If the breezer is not connected to Wi-Fi, try changing the router’s encryption type to WPA2-PSK (Xiaomi devices do not support WPA3 and hidden nets SSID.

Setting up the modes of operation: how to choose the optimal parameters for winter and summer

Xiaomi Breeze MJFXJ The 150 has 5 main modes that are customized in the Mi Home app:

Regime.	Fan speed	Heated	When to use
Automobile	Levels 1-3 (adjusted automatically)	On at t° air-breath < 5°C	For permanent employment
Son	Level 1 (20 m3/h)	Off.	At night or in quiet rooms
turbo	Level 3 (50 m3/h)	On/Off (set up)	High air pollution levels
Eko	Levels 1-2 (energy saving)	Off.	To save electricity
Hand-held	Levels 1-3 (selected by the user)	On/off.	For individual settings

In winter, it is important to adjust the air heating correctly:

🔥 Set your target heating temperature in the range 18–22°C (in the Appendix Settings) → Heating temperature).
❄️ If the breeze freezes, reduce the fan speed to level 1 or temporarily turn off the heating.
💡 Lower temperature -10°C is recommended to use a breeze in Eco mode without heating.

⚠️ Attention: If the breeze MJFXJ 150 gives you an error E2 (overheating, immediately disconnect it from the mains and check the air filter, cause clogging with dust or improper installation.

What to do if the breeze blows cold air in winter?

This problem arises from the insufficient power of the heating element (only 500 W). Solutions: 1. Reduce the fan speed to level 1 - the air will have time to heat up. 2. Set the target heating temperature to a maximum (25).°C). 3. Use a breeze paired with a heater (e.g., Xiaomi Smartmi Heater). 4. Check if cold air blows through the slits in the duct (you need to seal with foam).

Maintenance and replacement of filters: schedule and instructions

The quality of the filters determines the efficiency of air purification and the life of the breeze.

🧹 Pre-filter - every 3 months (can be washed with water and dried)
🔬 HEPA-filter (H11) — Every 6-12 months (depending on air pollution)
☠️ Coal filter – every 6 months (not refurbishable)

To replace the filters:

Turn off the breeze.
Remove the front panel, pulling it on yourself (latches at the bottom).
Remove old filters, install new ones (the arrows on the filters should look down).
Reset the filter resource counter in the application: Settings → Filter reset.

Signs that it is time to change the filters:

🌫️ The airflow decreased at the same fan speed.
🤧 There was an unpleasant smell when the breeze was turned on.
📉 In the Mi Home app, a notification appears Replace the filter.

💡

Ignoring filter replacement not only causes air quality to deteriorate, but also causes the breezer engine to overload. E1 (fan failure) and failure of the device.

Common mistakes and ways to eliminate them

Even with the right installation, Xiaomi Breezer MJFXJ 150 can malfunction. Consider typical problems and solutions:

Mistake.	Reason.	Decision
E1	Fan malfunction or filter clogging	Clean the filters or replace them. If you have a problem, contact the service.
E2	Overheating of the heating element	Turn off the breeze for 30 minutes. Check the vents.
E3	Sensor malfunction CO₂ or PM2.5	Reset the device. If the error happens again, you need to replace the sensor.
Breather doesn't warm the air	Temperatures outside higher +10°C (heating is switched off automatically)	Manually turn on the heating in the application settings.
Not connected to Wi-Fi.	Mi Home incorrect region or incompatible router	Change the region to China or upgrade the router’s firmware.

If the breeze makes uncharacteristic sounds (creaking, knocking):

🔧 Check the attachment of the inner unit - may have weakened the screws.
🌀 Make sure the fan blades do not touch the body (adjustment may be required).
🔄 Reboot the device (unplug the network for 1 minute).

FAQ: Answers to Frequent Questions About Xiaomi Breezer MJFXJ 150

🔹 Can I use a breezer without connecting to Mi Home?

Without the app, you can switch the breeze on/off with a button on the body and switch fan speeds (levels 1-3), but the heating, automatic modes and air quality monitoring will not be available.

🔹 How much electricity does the breeze consume?

Cost depends on the regime: 🌬️ Level 1 (sleep): ~5 Wh/h 🌀 Level 2 (auto): ~15 Wh/h 🔥 Level 3 (turbo) + heating: up to 500 Wh

🔹 Can you install a breezer yourself or need a master?

You can do the installation yourself if you have experience with the drill and electrical wiring. However, for installation in an apartment building, you may need to agree with the management company (drilling load-bearing walls is prohibited!).

🔹 How to Reset Breezer to Factory Settings?

To reset, press and hold the power button on the case for 10 seconds until the indicator flashes red, and then the device will be unconnected from the Mi Home account, and you can connect it again.

🔹 Where to buy original filters for MJFXJ 150?

Official filters are on sale: 🛒 On the Xiaomi website (section Accessories for breezers). 📦 In the Xiaomi Store or at official dealers. 🌍 On AliExpress (see article by article) MJFXJ-FILTER, But check reviews!.Caution: Non-original filters may not be sized or have poor cleaning quality.