Review of the Xiaomi Air Purifier 4 Compact

Ruminesia – Clean indoor air is something many people want, especially when dust, smoke, or odors easily build up inside bedrooms or small apartments. That’s why compact air purifiers have become popular for improving indoor air quality without taking up much space. In this Review of the Xiaomi Air Purifier 4 Compact, I share my hands-on experience using this small air purifier in everyday situations.

From its compact design to its responsive air quality sensor, this device focuses on simple and practical air purification. I also tested how well it reacts to smoke and odors, how quiet it is when running at night, and how easy it is to control through the Mi Home app.

If you’re considering a compact air purifier for a bedroom, apartment, or personal workspace, understanding how this device performs in real use can help you decide whether it’s the right choice for your space.

Key Highlights

• The Xiaomi Air Purifier 4 Compact features a compact and lightweight design that makes it easy to place in bedrooms, apartments, or small workspaces.
• The built-in air quality sensor quickly detects smoke and odors, providing real-time visual feedback through the indicator light.
• Three operating modes—Auto, Normal, and Night—allow flexible use depending on air conditions and daily activities.
• Night Mode runs quietly, making it comfortable to use overnight without disturbing sleep.
• The device can be easily controlled and monitored through the Mi Home app for convenient smart operation.
• With a price range around $89–$101, it offers practical value for maintaining cleaner air in small indoor spaces.

My Hands-On Review of the Xiaomi Air Purifier 4 Compact

After using the Xiaomi Air Purifier 4 Compact for some time, I noticed several things that stand out in daily use. As a compact air purifier for small rooms, this device focuses on practicality, portability, and simple smart control. From my experience, its compact design, responsive air quality detection, quiet operation, and easy setup make it convenient for everyday use at home.

I Find the Design Compact and Easy to Place

One of the first things I noticed about the Xiaomi Air Purifier 4 Compact is its size. With a height of about 35 cm and a diameter of around 22 cm, the device is small enough to fit easily in different areas of my home.

Because of its compact minimalist design, I can place it in various rooms without worrying about space. I have tried placing it in my bedroom and near my workspace, and it fits comfortably in both areas.

Another thing I appreciate is how easy it is to move. The device is lightweight, so I can relocate it whenever I want to improve air circulation in another room. This flexibility makes it practical for apartments or bedrooms where space is limited.

I Notice the Air Quality Sensor Responds Quickly

During my use, the air quality detection feature felt quite responsive. When I placed the purifier in a bedroom of around 24 m², the sensor reacted quickly to smoke or strong odors, such as perfume.

When the air quality changed, the device’s indicator light turned red almost immediately. This real-time air quality indicator helps me understand when the indoor air becomes polluted.

From my experience, this responsiveness makes the purifier feel more reliable because I can clearly see when the device detects changes in the surrounding air.

I Can Choose Between Three Useful Operating Modes

The Xiaomi Air Purifier 4 Compact provides three operating modes that I can switch depending on the situation. Each mode adjusts the airflow and purification intensity:

• Auto Mode – The purifier automatically adjusts its speed based on the detected air quality.
• Normal Mode – I use this mode when I want steady air circulation during daily activities.
• Night Mode – This mode reduces noise and airflow so the purifier runs quietly while I sleep.

Personally, I use Night Mode the most because the quiet operation makes it comfortable to run the purifier overnight without disturbing my sleep.

I Find the Setup Process Simple with the Mi Home App

Another thing I like about the Xiaomi Air Purifier 4 Compact is how easy it is to set up. I connected the device using the Mi Home app, which allows me to control most functions directly from my phone. Here is the setup process I followed:

• I installed the Mi Home app on my smartphone.
• I connected the air purifier to my home Wi-Fi network.
• I paired the device with the app by following the instructions on the screen.
• After that, I could monitor air quality and adjust the purifier settings easily.

With the Mi Home mobile app control, managing the device feels more convenient because I do not need to manually adjust the purifier every time.

In My Opinion, the Price Feels Reasonable

From what I have seen in the market, the Xiaomi Air Purifier 4 Compact is usually sold between $89.30 and $101.71.

Based on my experience using it, the device offers a good balance between price and functionality. Its compact design, responsive air monitoring, and quiet operation make it suitable for improving indoor air quality in smaller spaces.

For bedrooms, apartments, or personal workspaces, I feel this air purifier is a practical and worthwhile option.

Specifications of the Xiaomi Air Purifier 4 Compact

The Xiaomi Smart Air Purifier 4 Compact is expertly crafted to enhance air quality in small to medium-sized rooms. Here’s a closer look at its essential specifications of the Xiaomi Air Purifier 4 Compact and standout features:

What is the Xiaomi Air Purifier 4 Compact?

The Xiaomi Air Purifier 4 Compact is a small indoor air purifier designed to improve air quality in enclosed spaces such as bedrooms, apartments, or small offices. It is part of Xiaomi’s smart home ecosystem and focuses on providing effective air filtration in a compact and portable design.

The device draws air from the surrounding environment and passes it through its internal filtration system to remove dust, allergens, and other airborne particles. After filtering the air, it releases cleaner air back into the room, helping maintain healthier indoor air conditions. Users can also monitor and control the device through the Mi Home app for more convenient operation.

In everyday use, the Xiaomi Air Purifier 4 Compact is commonly placed in small rooms where air circulation and cleanliness are important. Its compact size makes it easy to move and position wherever cleaner air is needed.

Key Features of the Xiaomi Air Purifier 4 Compact

The Key Features of the Xiaomi Air Purifier 4 Compact highlight its ability to deliver efficient air purification in a compact design. It combines effective filtration, strong air circulation, quiet operation, and smart controls, making it suitable for small to medium-sized rooms.

• Efficient Filtration: This device can capture particles as small as 0.3 microns with an efficiency of 99.97%. It effectively removes allergens such as pollen, pet dander, and dust in the air, making your environment healthier.
• CADR (Clean Air Delivery Rate): The Xiaomi Air Purifier 4 Compact has a CADR of 230 m³/hour. This makes it suitable for rooms ranging from 16 to 27 m², ensuring the air around you stays clean and fresh.
• Low Noise: The device operates at a very low noise level, only about 20 dB in sleep mode. Thus, you don’t need to worry about noise disturbances while using this product at night.
• Smart Control: One of the best features of the Xiaomi Air Purifier is its ability to be controlled via the Mi Home or Xiaomi Home app. In addition, this device is compatible with Google Assistant and Amazon Alexa, allowing you to adjust the air purifier just by voice commands.

Advantages of the Xiaomi Air Purifier 4 Compact

Understanding the advantages of the Xiaomi Air Purifier 4 Compact helps users evaluate whether this device fits their indoor air quality needs. The following points summarize the key strengths that make this compact air purifier practical for everyday use.

• High-Efficiency Filtration: The purifier uses a three-layer HEPA filtration system that captures up to 99.97% of airborne particles such as dust, allergens, smoke, PM2.5, and PM10 to improve indoor air quality.
• Space-Saving Design: The compact cylindrical body allows the device to fit easily on floors, shelves, or desks, making it suitable for small rooms like bedrooms, apartments, dorms, or home offices.
• Quiet Operation: The purifier runs with low noise levels and includes a sleep mode that reduces sound significantly, allowing it to operate comfortably in bedrooms or workspaces.
• Smart Monitoring and Control: Built-in air quality sensors provide real-time feedback through a color-coded LED indicator, helping users quickly understand current indoor air conditions.
• App and Voice Integration: Users can connect the device to the Mi Home app to monitor air quality, adjust fan speeds, set schedules, and control the purifier through voice assistants like Google Assistant or Alexa.
• Energy-Efficient Performance: With a power consumption of around 27 watts at maximum output, the purifier can run continuously while keeping electricity usage relatively low.

Pros and Cons of the Xiaomi Air Purifier 4 Compact

If you’re considering the Xiaomi Smart Air Purifier 4 Compact, it’s important to weigh its strengths and weaknesses before making a decision. Let’s break down the pros and cons of the Xiaomi Air Purifier 4 Compact in detail so you can determine if it’s the right fit for your needs.

Pros of the Xiaomi Air Purifier 4 Compact

Understanding the Pros and Cons of the Xiaomi Air Purifier 4 Compact helps users decide whether this device fits their indoor air quality needs. The following points highlight the Pros of the Xiaomi Air Purifier 4 Compact, focusing on practical benefits such as filtration performance, quiet operation, and smart features.

• Strong Air Purification Performance: The purifier uses a multi-layer HEPA filtration system with 3-in-1 filtration technology to capture dust, pollen, pet dander, and other airborne particles while supporting effective PM2.5 particle removal.
• Quiet Operation for Bedrooms: The low-noise air purification system allows the device to run quietly, especially in sleep mode, making it suitable for bedrooms, study areas, and other noise-sensitive spaces.
• Compact and Portable Design: The portable air purifier design and lightweight body make it easy to move between rooms, making it ideal as a compact air purifier for small rooms, apartments, or home offices.
• Smart App Connectivity: Smart air purifier connectivity allows users to control the device through the Mi Home app, monitor real-time air quality, adjust fan settings, and schedule operation remotely.
• Voice Assistant Compatibility: Voice assistant compatibility enables hands-free control through smart home ecosystems, allowing users to manage the purifier using simple voice commands.
• Energy-Efficient Operation: The energy-efficient air purification system allows continuous operation without significant electricity consumption, supporting long-term indoor air quality improvement.
• Helpful Safety and Maintenance Features: Built-in features like the filter replacement indicator and child lock simplify the air purifier maintenance routine while improving safety for homes with children.

Cons of the Xiaomi Air Purifier 4 Compact

Understanding the Pros and Cons of the Xiaomi Air Purifier 4 Compact helps users evaluate whether this device fits their room size and usage preferences. When reviewing the Cons of the Xiaomi Air Purifier 4 Compact, several practical limitations appear related to coverage area, control methods, and air quality readings.

• Check Room Coverage Limits: The purifier is designed as a compact air purifier for small rooms, so its performance is best in bedrooms, small apartments, or personal workspaces rather than large living areas.
• Expect Slower Purification in Large Spaces: Because of its smaller clean air delivery rate (CADR), air circulation and PM2.5 particle removal may be less effective in large or open-plan rooms.
• Prepare to Use the Mobile App: Most advanced controls are managed through Mi Home app control, including real-time air quality monitoring, fan speed adjustment, and scheduling features.
• Understand Smart Connectivity Dependence: Smart air purifier connectivity requires a smartphone and a stable internet connection to access full control and automation settings.
• Be Aware of Sensor Reading Differences: The built-in sensors estimate indoor air quality, but the readings may vary slightly compared with external measurement tools.
• Use Air Quality Data as a General Guide: The real-time air quality monitoring display should be treated as a reference for indoor air quality improvement rather than a precise environmental measurement.

How to Set Up the Xiaomi Air Purifier 4 Compact

Setting up your device correctly ensures it works efficiently from the first use. This guide explains how to Set Up the Xiaomi Air Purifier 4 Compact with clear steps so you can start improving your indoor air quality quickly.

• Check Package Contents: Open the box and confirm that the air purifier unit, power adapter, and user manual are included before starting the setup.
• Locate the Filter Compartment: Turn the purifier on and find the filter compartment at the bottom of the device.
• Remove the Filter Packaging: Take the filter out and remove the protective plastic wrap so the filter can function properly.
• Reinstall the Filter: Insert the filter back into the purifier and ensure it is seated securely inside the compartment.
• Connect the Power Adapter: Plug the power adapter into the purifier and connect it to a nearby electrical outlet.
• Turn On the Device: Press the power button on the control panel and check that the indicator light turns on to confirm the purifier is running.
• Install the Mi Home App: Download the Mi Home or Xiaomi Home app from your smartphone’s app store to enable smart control features.
• Add the Purifier in the App: Open the app, tap the “+” icon, and select Xiaomi Air Purifier 4 Compact to begin the connection process.
• Connect to Wi-Fi: Follow the on-screen instructions and make sure your phone is connected to a 2.4 GHz Wi-Fi network since the device does not support 5 GHz.
• Reset Wi-Fi if Connection Fails: Press and hold the light adjustment button for about 7 seconds to reset Wi-Fi settings, then reconnect through the app.
• Select an Operating Mode: Use the mode button on the control panel to switch between Auto Mode, Sleep Mode, or Manual Mode based on your preference.
• Enable Child Lock (Optional): Press and hold the mode switch button for 7 seconds to activate the child lock and prevent accidental setting changes.

Tips for Maintenance of the Xiaomi Air Purifier 4 Compact

Tips for maintenance of the Xiaomi Air Purifier 4 Compact help ensure the device continues to deliver consistent air purification and reliable performance. Proper maintenance also extends the lifespan of the purifier while maintaining accurate air quality monitoring.

• Replace the Filter Regularly: Change the air filter every 6–12 months, depending on usage and indoor air quality, to maintain optimal filtration performance.
• Turn Off and Unplug the Device: Power off the purifier and unplug it from the electrical outlet before performing any maintenance to ensure safety.
• Open the Filter Compartment: Turn the purifier upside down and open the bottom filter compartment to access the filter inside the device.
• Remove the Old Filter: Carefully take out the used filter and dispose of it properly to prevent dust or contaminants from spreading.
• Clean the Filter Chamber: Use a vacuum cleaner to remove dust or debris inside the filter compartment before installing a new filter.
• Install the New Filter Securely: Insert the replacement filter firmly into the compartment and close the cover properly to ensure correct airflow.
• Reset the Filter Indicator: Hold the power button for about six seconds while the purifier is in standby mode to reset the filter life tracking system.
• Clean the Exterior Surface: Wipe the outside of the purifier regularly using a dry, soft cloth to remove dust and keep the device looking clean.
• Maintain the Air Quality Sensor: Gently clean the particulate matter sensor area with a soft brush or a vacuum with light suction to maintain accurate air quality detection.
• Check the Filter Life Indicator: Monitor the filter exhaustion indicator on the device display or mobile app to know when a replacement is required.
• Use the Xiaomi Home App for Monitoring: Open the Mi Home or Xiaomi Home app to check air quality data, adjust purification modes, and track the remaining filter lifespan.

Comparison of Xiaomi Air Purifier 4 Compact vs. Xiaomi Air Purifier 4 Lite

Let’s compare the specifications, performance, ease of use, and features of the Xiaomi Air Purifier 4 Compact and the Xiaomi Air Purifier 4 Lite to help you make the right choice.

Read More:

• Related articles on the topic of Air Purifiers
• Related articles on the topic of Xiaomi
• Xiaomi Air Purifier 4 Compact Manual

Frequently Asked Questions about Xiaomi Air Purifier 4 Compact

This FAQ section answers common questions about the Xiaomi Air Purifier 4 Compact, helping you understand its features, performance, and everyday usage. If you’re considering the Xiaomi Air Purifier 4 Compact for your home, these quick answers cover the most important things users usually want to know.

1. Is the Xiaomi Air Purifier 4 Compact suitable for small rooms?

Yes, the Xiaomi Air Purifier 4 Compact is designed for small to medium-sized rooms. It supports a coverage area of around 16–27 m², making it suitable for bedrooms, small living rooms, or home offices.

2. How often should the filter be replaced?

The filter typically lasts between 6 and 12 months, depending on air quality and usage. The Mi Home app can notify you when the filter efficiency begins to decrease.

3. Can the Xiaomi Air Purifier 4 Compact remove odors and smoke?

Yes, the purifier includes an activated carbon layer designed to absorb odors and harmful gases. It can help reduce cooking smells, pet odors, and cigarette smoke indoors.

4. How quiet is the Xiaomi Air Purifier 4 Compact in sleep mode?

In Sleep Mode, the purifier operates at around 20 dB, which is extremely quiet and similar to a whisper. This makes it suitable for bedrooms, nurseries, or quiet working environments. Pasted text

5. Can I control the Xiaomi Air Purifier 4 Compact using my phone?

Yes, the purifier supports remote control through the Mi Home or Xiaomi Home mobile app. You can adjust fan speed, monitor air quality, and schedule operation directly from your smartphone.

6. How much electricity does the Xiaomi Air Purifier 4 Compact use?

The purifier consumes up to 27 W of power at maximum speed. This low power usage makes it energy-efficient and suitable for continuous daily operation.

7. Does the Xiaomi Air Purifier 4 Compact have an air quality sensor?

Yes, the device includes a built-in particle sensor that monitors indoor air quality in real time. The results are displayed through a four-color indicator light on the device.

8. What is the CADR rating of the Xiaomi Air Purifier 4 Compact?

The purifier has a Particle CADR of 230 m³/h. This rating indicates how quickly it can remove airborne particles such as dust, pollen, and fine pollutants from a room.

9. Can the filter be washed instead of replaced?

No, the filter is not washable and must be replaced when it reaches the end of its lifespan. Washing the HEPA filter may damage the filtration structure and reduce purification performance.

10. Can the Xiaomi Air Purifier 4 Compact be placed on the floor?

Yes, the purifier can be placed either on the floor or on a table. Just make sure there is enough space around the unit so the 360° air intake system can work properly.

Conclusion

After using the device for some time, this Review of the Xiaomi Air Purifier 4 Compact shows that the purifier focuses on simplicity, practicality, and efficient performance for small rooms. Its compact size makes it easy to place anywhere, while the responsive air quality sensor and multiple operating modes help maintain cleaner indoor air throughout the day.

Features such as quiet Night Mode and Mi Home app control also make the device convenient for everyday use. For bedrooms, apartments, or personal workspaces, it provides a balanced combination of portability, ease of use, and reasonable pricing.

If you’re considering a compact air purifier to improve indoor air quality, this model can be a practical option to explore. If you’ve used the Xiaomi Air Purifier 4 Compact as well, feel free to share your experience or thoughts.

References

• https://www.mi.com/global/product/xiaomi-smart-air-purifier-4-compact/