The Air Purifier Showdown: Levoit 300S vs. 400S

Written By: Dr Fahad Yasin

Are you wrestling with the quandary of selecting between Levoit’s 300S and 400S air purifiers? Fret not! I empathize with the challenges you face, and I’m here to delve deep into the comparison of these two models, armed with data and insights, to help you make an informed choice. Brace yourself for a thorough examination as we seek to reveal the ultimate winner in this Air Purifier Showdown!

Table Of Content

Quick Comparison: Key Features

Before a detailed rundown, here are the key features of the Levoit 300S and 400S air purifiers that set them apart:

  • Coverage Area: The 300S covers 219 sq ft., while the 400S boasts a broader coverage of 403 sq ft.
  • Power Consumption: The 400S demands 38 W of power, whereas the 300S requires only 26 W.
  • Size and Design: The 400S is larger and bulkier compared to the 300S.

But, that’s not all. Continue reading to learn about their detailed specs and see how both of these Levoit devices compare to each other. Let’s begin!

Comparison Chart

The table listed below has all the essential details:

Type:Smart True HEPA Air PurifierSmart True HEPA Air Purifier
Effective Range:219 ft2 / 20 m2403 ft2 / 37 m2
Dimensions:8.7 x 8.7 x 14.2 in /

22 x 22 x 36 cm
10.8 x 10.8 x 20.5 in /

27.4 x 27.4 x 52 cm
Weight:5.95 lb / 2.7 kg14.12 lb / 6.4 kg
Noise Level:24–48dB24–52dB
CADR:141 CFM / 240 m³/h260 CFM / 442 m³/h
Standby Power:<2W<2W
Smart Controls:Via VeSync app, Amazon Alexa or Google Assistant™Via VeSync app, Amazon Alexa or Google Assistant™
Filtration System:Pre-Filter, H13 True HEPA Filter, High-Efficiency Activated Carbon Filter with HEPASmart™ TechnologyPre-Filter, H13 True HEPA Filter, High-Efficiency Activated Carbon Filter with HEPASmart™ Technology and ARC Formula™
Air Quality Sensor:AirSight™ Plus Technology with PM2.5 Display and Air Quality Indicator RingsAirSight™ Plus Technology with PM2.5 Display and Air Quality Indicator Rings
VortexAir™ Technology:Increases indoor air circulation and filtration efficiencyIncreases indoor air circulation and filtration efficiency
Check PriceCheck Price
Before we delve into the pros and cons, let’s embark on a detailed analysis, comparing these Levoit devices across 9 crucial parameters. Let’s uncover the nuances that differentiate these air purifiers!

Levoit 300S: A Quick Look at the Good and the Bad

Levoit 300S

Let’s compare the advantages and disadvantages of the 300S:


  • Equipped with H-13 True HEPA filter and 3-stage technology to tackle airborne particles.
  • Whisper-quiet operation due to QieutKEAP technology with noise levels as low as 24 decibels.
  • VeSync App effortlessly allows it to control it from anywhere.
  • Allows you to create custom schedules to need your preferences.
  • Energy-efficient design with Energy Star certification.


  • Provides lesser coverage than the 400S.

Levoit 400S: A Quick Look at the Good and the Bad

Levoit 400S

Now that I have discussed the former model, let’s look at the benefits and drawbacks of the second unit:


  • Provides better coverage of 403 sq ft. ideal for medium to large rooms.
  • Wi-Fi connectivity allows remote control via a smartphone app.
  • Real-time air quality monitoring with PM 2.5 display sensor.
  • Gets rid of any smells with the powerful ARC formula


  • The design is a bit bulkier.

Key Differences: A Closer Look

1. Filtration System:

Both the Levoit Core 300S and Core 400S feature a comprehensive 3-stage filtration system for clean air:

  • Pre-Filter: Captures larger contaminants like dust, hair, and pet fur.
  • HEPA Filter: Clears impurities and allergens as small as 0.003 microns, including pollen and pet dander.
  • Activated Carbon Filter: Removes VOCs, chemicals, cooking smells, pet odors, and fumes.

Winner: It’s a draw as both purifiers share the same efficient filtration system.

2. Coverage Area & Efficiency:

In terms of coverage area:
  • The 300S covers 219 sq ft. and is designed for smaller rooms, with a CADR rating of 240 m³/h (141 CFM).
  • The 400S boasts a higher range of 403 sq ft., capable of handling larger and more open floor plans, with a better CADR rating of 442 m³/h (260 CFM).
  • The 400S, with VortexAir Technology, ensures even distribution of cleaned air, but the 300S may take slightly longer to purify larger rooms.
Winner: Winner: The 400S takes the lead with higher coverage and a superior CADR rating, excelling in removing smoke, dust, and pollen.

3. Working Noise of Both Purifiers:

Both the Levoit Core 300S and Core 400S models feature whisper-quiet technology, ensuring a peaceful environment.

  • Both of the both have the same noise level at the lowest setting of 24 decibels.
  • At the highest fan speed setting, the 400S produces 52 decibels compared to the 48 decibels of its counterpart.

Winner: The 300S has a lower noise level and is a winner in this category.

4. Power Consumption

Both the Levoit Core 300S and Core 400S models are Energy Star certified, ensuring energy-efficient operation.

  • The Core 300S consumes lower power at 26 W compared to the Core 400S, which has a power rating of 38 W.
  • Core 300S is the better choice for energy savings, but you may need to compromise on the efficiency the 400S offers.
Winner: The 300S is the better choice when it comes to saving energy.

5. Features

Both models offer smart connectivity and support Wi-Fi connectivity and compatibility with the VeSync App.

  • The AirSight Plus technology allows continuous monitoring of air quality in real time, providing updates and changes in intake.
  • The color-indicating ring enables quick assessment of air quality, and the VeSync App provides detailed insights into PM 2.5 particles.
Smart Controls:YesYes
QuietKEAP™ Technology:YesYes
VortexAir™ Technology:YesYes
Ozone Free:YesYes
1–24 Hour Timer:YesFor 1-12 hours
Check Filter Indicator:YesYes
3-Stage Filtration:YesYes
Sleep Mode:YesYes
Air Quality Indicator Rings:YesYes
Wi-Fi Indicator:YesYes
Winner: It’s a draw as both models offer similar connectivity and smart features.

6. Connectivity & Compatibility:

  • This offers enhanced convenience and control, allowing you to manage the air purifier remotely from anywhere using your smartphone.
  • You can create personalized schedules and even control the device using voice commands through Alexa or Google Home, making both of the options very user-friendly.

Winner: I call it a draw as the connectivity and the smart features of the cleaners are the same for both of the units.

7. Appearance: Size and Design

  • The 300S is much lighter and smaller, weighing 5.95 pounds, designed for smaller rooms.
  • The 400S is bigger and heavier, weighing 14 pounds, catering to larger rooms than the 300S.
Winner: The 300S takes the lead in terms of portability and movability.

8. Warranty and Certifications

Both the Levoit Core 300S and 400S come with a comprehensive 2-year warranty.

  • CARB, Energy Star, ETL, and FCC certifications have been achieved by both models.
Winner: As all Levoit Core S series models have the same certifications and warranty, it’s a draw.

Final Decision: So Which One to Choose?

After this comprehensive comparison, the Core 400S emerges as the superior choice due to its additional features and enhanced functionality.

  • It has a higher CADR rating, providing better coverage and effectively removing pollutants.
  • The ARC formula neutralizes odors and smells, enhancing the air purification process.


The Levoit 400S filter lasts up to 12 months, ensuring prolonged usage and cost-effectiveness.
Yes, the Levoit 400S comes with a filter, equipped with a 3-stage HEPA filtration system, including a pre-filter, HEPA filter, and activated carbon filter.
No, the Levoit 400S does not produce ozone, ensuring a safe and ozone-free environment.
Yes, the Levoit 300S effectively removes mold, ensuring clean and mold-free air.


Both the Levoit Core 300S and Core 400S air purifiers offer remarkable smart features, powerful purification capabilities, and user-friendly app designs, making them the forefront products for clean air enthusiasts. However, your choice should depend on specific preferences and requirements.

  • If you seek a compact, lightweight, and energy-efficient option, the Levoit Core 300S is the clear winner, best suited for smaller rooms and those on a budget.
  • On the other hand, if broader coverage, higher CADR ratings, and odor-neutralizing capabilities are your top priorities, then the Levoit Core 400S emerges as the superior choice, ideal for medium to large rooms.
Remember to carefully evaluate their power consumption, cleaning power, and coverage to align with your needs and make an informed decision.

Levoit Core 300S True HEPA Air Purifier

Compact and light model that cleans up to 219 sq ft. of space. Comes with a H-13 filter, smart controls, and a patented whisper sleep mode to reduce noise.

Levoit Core 400S True HEPA Air Purifier

Comes with an ARC Formula to neutralize odors and smells up to 403 sq ft on auto mode. QuietKEAP tech for you to enjoy low noise and clean air. Equipped with Voice Control and PM 2.5 display laser dust sensor to remove airborne particles detected.

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