XiaomiUser ManualXiaomi

Xiaomi Mi Air Purifier 4 Compact

Sections17
Reading5 min
UpdatedApr 2026
LanguageEnglish
Section 01

Product Overview

Read this manual carefully before use, and retain it for future reference.

Note: Illustrations of the product, accessories, and user interface in this user manual are for reference purposes only. The actual product and functions may vary due to product enhancements.

Front View Rear View
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Section 02

Product Overview

Display Instructions The negative ion function is enabled by default. The purifier can generate negative ions when it is working, and then the negative air ions (NAI) are produced through the reaction between the negative electron and the oxygen molecules. NAI is very good at trapping certain air pollutants. The function can be enabled or disabled in the app. When it is enabled, the negative ion indicator is on; when it is disabled, the indicator is off.

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Section 03

Placing the purifier

For optimal performance, make sure the distances between purifier's air inlets and other objects such as walls meet the requirements as suggested below.

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Section 04

Connecting to an electrical outlet

Connect the power cord to the power port at the bottom of the purifier and then plug it into an electrical outlet.

Note: It is recommended to keep doors and windows closed for a better purifying effect when using the purifier.

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Section 05

Turning on/off

Tap the power button to turn on the purifier. While the purifier is on, tap the power button to turn it off.

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Section 06

Switching mode

While the purifier is on, tap the mode switch button to cycle through modes.

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Section 07

Filter life notification

The display will show the remaining service time of the filter when the purifier is turned on. The display will show a warning icon if no genuine filter is detected.

Filter service time remaining notification Not a genuine filter warning
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Section 08

Adjusting the display's brightness

Press the display on/off button to cycle through its brightness levels: on, dim, and off.

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Section 09

Resetting Wi-Fi

When connecting the purifier to the app for the first time or unable to connect to it, press and hold the display on/off button for 7 seconds. The purifier will make a notification sound once Wi-Fi is successfully reset.

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Section 10

Enabling/disabling the child lock function

Press and hold the mode switch button for 7 seconds to enable or disable the child lock function. The purifier will make the corresponding notification sound and show the corresponding icon on the display.

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Section 11

Enabling/Disabling Wi-Fi

Simultaneously press and hold the mode switch button on the display and the brightness adjustment button for 7 seconds. The purifier will make a notification sound and the Wi-Fi will be disabled.

While Wi-Fi is off, simultaneously press and hold the mode switch button on the display and the brightness adjustment button for 7 seconds. The purifier will make a notification sound and the Wi-Fi will be enabled.

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Section 12

Connect with Mi Home / Xiaomi Home App

This product works with Mi Home / Xiaomi Home app*. Control your device with Mi Home / Xiaomi Home app.

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Scan the QR code to download and install the app. You will be directed to the connection setup page if the app is installed already. Or search "Mi Home / Xiaomi Home" in the app Store to download and install it. Open Mi Home / Xiaomi Home app, tap "+" on the upper right, and then follow prompts to add your device.

*The app is referred to as Xiaomi Home app in Europe (except for Russia). The name of the app displayed on your device should be taken as the default.

Note: The version of Mi Home app might have been current app version.

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Section 13

Daily Care & Maintenance

Warning: Make sure the purifier is turned off and unplugged before performing the following operations.

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Section 14

Cleaning fan blades and air duct

  • Press the indentation on the cover to open it. Use a screwdriver to loosen the screw, and then pull the cover upwards to remove the grille.
  • Use a vacuum cleaner to remove any dust from the air duct and fan blades, or wipe the dust off gently with a soft cloth.
  • Use a brush or soft cloth to gently wipe the negative ion transmitter.
  • Install the grille back and fasten the screw after cleaning.

Note: To avoid missing, the screw is not removable. Loosen the screw to remove the grille.

Note: To avoid damaging the purifier, do not rinse or spray the air duct and fan blades directly with water, or wipe them with a soaking wet cloth.

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Section 15

Cleaning the filter compartment

To ensure optimal ventilation and purification, use a vacuum cleaner to remove any dust from the air inlets and the filter compartment, or wipe these areas gently with a soft cloth.

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Section 16

Cleaning the laser particle sensor

Use a non-sharp tool to open the cover of the laser particle sensor, then use an air blow gun or hair dryer to clean the filter on the cover and the sensor, as illustrated in the figure.

Note: To avoid damaging the purifier, do not rinse or spray the filter compartment directly with water, or wipe it with a soaking wet cloth.

Note: Do not use hot air.

Name: Xiaomi Smart Air Purifier 4

Model: AC-M16-SC

Item Dimensions: 250 ×250 ×555 mm

Net Weight: Approx. 5.6 kg

Effective Coverage: 28–48 m2 *

Rated Voltage: 100–240 V~

Rated Frequency: 50/60 Hz

Rated Power: 30 W

Noise Level: ≤64 dB(A)

*Calculated according to standard GB/T 18801-2015

Network Standby Power Consumption: < 2.0 W

Particle Purification Efficiency: High

Formaldehyde Purification Efficiency: High

Particle's Clean Air Delivery Rate (CADR Particle): 400 m3 /h

Formaldehyde's Clean Air Delivery Rate (CADR Formaldehyde): 150 m3 /h

Wireless Connectivity: Wi-Fi IEEE 802.11 b/g/n 2.4 GHz

Storage Temperature: -10°C to 40°C

Storage Humidity: 5% - 9 0%

Production Date: See packaging

For details of the importer, please refer to the box.

RF Specification:

Wi-Fi 2.4 G (2400–2483.5 MHz), Max. RF Output Power: <20 dBm

RFID (13.56 MHz), Max. Magnetic Field Strength: < 6 0 dBμA/m@10 m

Under normal use of condition, this equipment should be kept a separation distance of at least 20cm between the antenna and the body of the user.

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Section 17

Regulatory Compliance Information

Europe — EU declaration of conformity

Hereby, Beijing Smartmi Electronic Technology Co., Ltd. declares that the radio equipment - Xiaomi Smart Air Purifier 4, type AC-M16-SC is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: http://www.mi.com/global/service/support/declaration.html

Disposal and recycling information

All products bearing this symbol are waste electrical and electronic equipment (WEEE as in directive 2012/19/EU) which should not be mixed with unsorted household waste. Instead, you should protect human health and the environment by handing over your waste equipment to a designated collection point for the recycling of waste electrical and electronic equipment, appointed by the government or local authorities. Correct disposal and recycling will help prevent potential negative consequences to the environment and human health. Please contact the installer or local authorities for more information about the location as well as terms and conditions of such collection points.

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