Levoit Core 400S Review 2024

If you have ever been curious about whether there exists an air purifier that is both affordable, powerful, and smart, then you will be happy to learn about the Levoit Core 400S air purifier. This air purifier has a sleek and modern appearance and exudes an air of reliability and high quality.

The Levoit Core 400S is a great addition to the Core Series, taking air purifying efficiency up another notch. With 403 sq ft of coverage, advanced options, and perfect adaptability for any environment – this powerhouse does it all! It comes with an industry-standard 3-in-1 filter system which includes a pre-filter, True HEPA filter & activated charcoal filter promising powerful results. Get ready to breathe clean fresh air in your living space!

Levoit Core 400S Review:

Levoit Core 400s



  • Color: Cream White
  • Product Dimensions: 10.79″D x 10.79″W x 20.47″H
  • Item Weight: ‎12.79 Pounds
  • Control Method: Voice
  • Wattage: 240
  • Suitable for large rooms up to 403 sq. ft.
  • Comes with a three-stage filter that lasts up to 12 months
  • Features advanced options, including an air quality sensor
  • Can be controlled via the VeSync app or voice assistants
  • Comes with a 2-year warranty from Levoit”


Manufacturer Levoit
Model Core 400S
Dimensions 10.8 x 10.8 x 20.5 inches (27.4 x 27.4 x 52 cm)
FiltersPre-filter, True HEPA Filter, and Activated Carbon Filter
Filter Longevityup to 12 months
Weight11 lb (5 kg)
Coverage(4.8 ACH) 403 sq. ft.
Power Consumption38W (24W European Model)
Number of Fan5 – Sleep Mode, Low Mode, Medium Mode, High Mode, and Turbo Mode


The Levoit Core 400S is a cylindrical device crafted with superior quality plastic, designed to have an excellent build that was carefully weighed and balanced. The white body of the machine has black accents along the top part with elegant silver details on its surface; it also comes equipped with a generous 79 inch (2 m) power cord.

I’m impressed with the thoughtful design of this device – it has two handles on either side, making transporting even its sizeable frame easy. Without these convenient grips, moving the Core 400S from one place to another would be quite a task!

Controls and Display

The Levoit Core 400S control panel has been greatly improved from its predecessors, now with more sensitive and intuitive touch buttons. It also sports a unique display and indicators that are exclusive to this model only, making operation easier than ever before!


The Levoit Core 400S air purifier has a substantial size and weight advantage over comparable models like the Winix 5500-2. At only 11 lbs (5 kgs) while measuring 10.8 x 10.8 x 20.5 inches (27.4x 27,4x 52 cm), this unit offers great portability without sacrificing on power or efficiency to create an ideal home environment for you and your family!


Capable of purifying rooms up to 403 square feet, this mid-sized air purifier is powerful enough to exchange the air in your space 4.8 times per hour – as certified by AHAM’s strict standards.


The Levoit Core 400S air purifier is bursting with features! It offers the classic options you would expect from a Levoit model, but takes it to the next level with an integrated air quality sensor, auto mode, app control, and compatibility with voice-activated devices.

Air Quality Sensors and Indicators

The Levoit Core 400S is equipped with the advanced Airsight Plus laser dust sensor, which can detect PM2.5 particles in real time for a more accurate air quality reading. Located at the rear of the device, this cutting-edge technology allows you to enjoy clean and healthy air all day long.

I’m delighted that the sensor is constantly active when the air purifier is plugged in, making it possible for me to check on the quality of air in my space at any moment through a clever app.

Auto Mode

Say goodbye to monitoring your air quality manually! The Core 400S enables convenient Auto Mode, which teams up with an air-quality sensor to optimize the device’s mode and speed based on current conditions in a given space. However, while the auto mode is incredibly helpful, accuracy may be impacted by flaws inherent within the sensing technology.

Sleep Mode

The Core 400S air purifier has a sleep mode that offers you the perfect balance between function and tranquility. Its effective extra fan speed ensures an environment of peace, whatever your setting – from the bedroom to the office. I can vouch for its use; it’s been my go-to in those moments when relaxed breathing is essential!

Filter Reset Indicator

The Levoit Core 400S provides the ultimate in convenience when it comes to filtering replacements with its innovative built-in reset indicator and smartphone app. With quick, fuss-free access to information about how much your current filters have been used, this device ensures you can trust its air purification capabilities every time.


Levoit offers a convenient timer feature that can be set between 1-12 hours. This fantastic option allows you to switch off your air purifier after a certain duration of time, and the timer settings are displayed on the monitor for convenience. If you’ve activated the timer setting, all it takes is one press of the button to check how much longer until deactivation!

Screen Off

Screen Off presents an ideal solution for those who use air purifiers in their bedrooms or are particularly sensitive to bright indicator lights. This groundbreaking feature dims all the indicators and lights on your device, providing a pleasant atmosphere that encourages restful sleep.

VeSync Smart App

Levoit has pioneered a series of air purifiers that are compatible with the VeSync app, allowing them to continually refine and optimize it for maximum user benefits.


The Levoit Core 400S employs the well-known 3-in-1 filtration system found in many Levoit air purifiers. It is ozone-free and safe to use in any room. It is worth noting that Levoit has also released air purifiers with an ionizer feature, such as the Levoit PlasmaPro™ 400S, for those interested in this feature.


Reduce the strain on your True HEPA filters and maintain premium air purification with a pre-filter! This filter captures large particles such as dust, fibers, lint, pet hair, and dander to prolong the life of the deeper filtration system. Cleaning this between 2-4 weeks is key for optimal performance from your device.

True HEPA filter

The True HEPA filter is the most vital component of this device as it captures 99.97% of airborne particles down to 0.3 microns in size, including dust, smoke, and other irritants such as pollen and pet dander. By thoroughly cleaning the air around your home or office with a True HEPA filter, you can maintain an environment that is safe from pollutants for you and your family.

Activated Carbon Filter

Clean air is finally achievable! Our pellet-based activated carbon filter not only physically absorbs smoke, odors, and fumes but also filters out compounds such as formaldehyde, benzene, ammonia; even the notorious hydrogen sulfide and VOCs. Reap all of these amazing benefits without any compromises since our product stands tall over other types in terms of odor neutralization effectiveness.


The Levoit Core 400S is an ideal air purifier for spaces up to 403 sq. ft., making it the perfect fit for any room size – large or small!

After trialing the Core 400S in my living room, bedroom, and kitchen for a few weeks, I was astounded by how much my indoor air quality had improved. From quickly eliminating cooking smells to improving sleep quality when used in the bedroom – this air purifier really did it all! It’s no wonder why I’m so pleased with its performance.

320 sq. ft. Room Test

To properly assess the Levoit Core 400S, I tested it in a 320 sq. ft room that is slightly less than the manufacturer’s recommended size. For an hour, I left this device running on Turbo mode to get its optimal performance.

During this period, the Core 400S delivered extraordinary results; reducing AQI from 133 to 6 – a whopping 96% improvement in air quality!

560 sq. ft. Room Test

To further test the efficiency of the Levoit Core 400S, I placed it in a room that exceeded its recommended dimensions of 560 sq. ft.

This air purifier successfully eliminated approximately 91% of airborne contaminants in only 60 minutes on its Turbo mode, demonstrating the Core 400S’s remarkable potency even in larger rooms. In short, this device is a formidable force against pollutants and allergens.

Noise Test

With 4 fan speeds and a special sleep mode, the Levoit Core 400S offers users 5 distinct levels of air-purification speed. This allows them to become accustomed to the motor’s sound at their own pace and select which setting best suits their needs!

The Levoit Core 400S packs a phenomenal sleep mode that is almost silent, emitting only 42.1 decibels of sound!

To my surprise, the Core 400S is not overly loud at maximum speed as some of its competitors are. It runs with a sound level of 59.9 dBA which only few air cleaners can claim to match – The Alen BreatheSmart FLEX being one such example. In conclusion, this air purifier provides whisper-quiet performance even at full speeds – making it an ideal choice for noise-conscious users.

Speed Value (dBA)

Sleep Mode 42.1 dBA

Low Mode 43.6 dBA

Medium Mode 47.8 dBA

High Mode 55.4 dBA

Turbo Mode 59.9 dBA

Power consumption

The Levoit Core 400S blew me away with its power, considering it has such a high airflow and yet runs on an astoundingly low 38W motor (24W for the European market).

With the Core 400S’ 24/7 Turbo mode, you’ll be able to breathe easy for a full month—all with only a minimal $3 increase on your electricity bill. Enjoy purifying the air and all its incredible benefits without breaking the bank!

Pros & Cons

  • Suitable for large rooms up to 403 sq. ft.
  • Uses a three-stage filtration system
  • Equipped with a True HEPA filter
  • Comes with an air quality sensor and indicator
  • Offers advanced options and can be controlled via the VeSync app
  • Has an automatic mode for convenience
  • Demonstrates excellent performance
  • Relatively quiet compared to other air purifiers
  • Low power consumption
  • Some users have reported receiving a large number of promotional emails after registering for the smart app
  • The air quality sensor may not be as precise as some users would like

Final Thoughts

Overall, the Levoit Core 400S is an impressive air purifier that has exceeded my expectations. It offers a range of advanced features, such as a built-in air quality sensor and the ability to connect to the VeSync app or a voice assistant.

The Levoit Core 400S air purifier is a powerful tool for any home, efficiently cleaning the air while promoting low-energy consumption. this device exceeds expectations in performance capabilities. Additionally, it operates quietly yet enhances indoor environments considerably; customers can rest assured their questions will be answered if left below in our comments section!

It is also energy-efficient, quiet, and effective at cleaning the air. Based on my experience, I would highly recommend the Core 400S. If you have any questions or concerns, feel free to leave a comment below.”

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The author is an Air purifier expert with overall knowledge of air and ionizers.