1. Introduction
The Xiaomi Smart Air Purifier 4 Compact is designed to provide fresh and clean air throughout your living space. Known for its stylish and efficient products, Xiaomi delivers a compact air purifier that seamlessly integrates into any home environment. This manual provides essential information for the proper setup, operation, and maintenance of your device.

The purifier effectively addresses common indoor air pollutants such as animal hair, kitchen fumes, animal smells, cigarette smoke, flower pollen, dust, and animal dander.
2. Setup
2.1 Unpacking and Placement
Carefully remove the air purifier and all accessories from the packaging. Place the device on a flat, stable surface in a central location within the room to ensure optimal air circulation. Ensure there is adequate space around the purifier for air intake and output.
2.2 Filter Installation
The air purifier comes with a high-performance filter. Refer to the device's instructions for accessing the filter compartment and correctly installing the filter. Ensure the filter is securely in place before operating the device.

2.3 Power Connection
Connect the power cable to the air purifier and then plug it into a suitable EU standard power outlet. The device is designed for a maximum power consumption of 27 W.
2.4 Connecting to Xiaomi Home App
To unlock smart features, download the Xiaomi Home app on your smartphone. Follow the in-app instructions to connect your air purifier to your home Wi-Fi network. This allows for remote control and monitoring.
3. Operating Instructions
3.1 Control Panel Overview
The top of the air purifier features a control panel for direct interaction. It typically includes buttons for power, mode selection, and indicators for Wi-Fi status and air quality.

3.2 Modes of Operation
- Standard Mode: Provides general air purification based on detected air quality.
- Night Mode: Operates at an ultra-low noise level of only 20 dB, with the option to extinguish the screen for undisturbed sleep.
- Automatic Mode: Adjusts purification speed automatically based on real-time air quality readings.
3.3 App Control
The Xiaomi Home app provides comprehensive control over your air purifier. Through the application, you can:
- Set work schedules and timers.
- Adjust purification parameters.
- Activate parental lock.
- Monitor real-time air quality, including PM2.5 value (μg/m3).
- Check Wi-Fi status and active purifier mode.

4. Maintenance
4.1 Filter Replacement
The high-performance filter has a large surface area and contains a significant amount of high-quality activated carbon. Filters typically last 6-12 months, ensuring long-lasting performance. The Xiaomi Home app will provide a filter replacement reminder when necessary. Always use genuine Xiaomi replacement filters.
4.2 Cleaning
Regularly wipe the exterior of the air purifier with a soft, dry cloth. For the air intake and output vents, use a soft brush or vacuum cleaner to remove dust accumulation. Ensure the air quality sensor (located at the rear) is kept clean for accurate readings.
5. Troubleshooting
If you encounter issues with your air purifier, consider the following common solutions:
- Device not turning on: Check if the power cable is securely connected to both the purifier and the power outlet.
- Poor air purification: Ensure the filter is correctly installed and not expired. Clean the air intake/output vents.
- Inaccurate air quality readings: Clean the air quality sensor located on the rear of the device.
- App connectivity issues: Verify your home Wi-Fi network is active and the purifier is within range. Restart the purifier and your router if necessary. Ensure the Xiaomi Home app is updated to the latest version.
- Unusual noise: Check for any obstructions in the air intake or output. Ensure the device is on a stable surface.
For persistent issues, refer to the official Xiaomi support resources.
6. Specifications
| Feature | Specification |
|---|---|
| Brand Name | XIAOMI |
| Model | AC-M18-SC |
| Product Dimensions | Φ220x355mm |
| Net Weight | Approx. 2.2 kg |
| Effective Coverage Area | 16-27 m² |
| Noise Level (Night Mode) | 20dB |
| CADR Particle | 230 m³/H |
| Connectivity Type | Wi-Fi |
| Color | White |
| Max Power Consumption | 27 W |
| Energy Consumption (24h) | Approx. 0.7 kWh |
| Filter Lifespan | 6-12 months |
| Plug Type | EU |
7. User Tips
- For optimal performance, place the purifier in a central location within the room, away from walls or furniture that might obstruct airflow.
- Regularly check the filter status via the Xiaomi Home app to ensure timely replacement and consistent air quality.
- Utilize Night Mode for quiet operation during sleep, ensuring clean air without disturbing your rest.
- Take advantage of the app's scheduling features to automate purification cycles, ensuring fresh air when you need it most.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Xiaomi website or contact your local authorized service center. Keep your purchase receipt as proof of purchase for any warranty claims.





