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Levoit Core 300S vs 400S – What’s the Difference?

Levoit’s Core line of air purifiers has several models with minor differences and many similarities. Below we’ll compare the Levoit Core 300S vs 400S, covering what the key differences are as well as how the air purifiers are similar.

Levoit Core series air purifiers receive very high ratings from consumers. The Core 300S and Core 400S both have a 4.7 star average rating on Amazon with thousands of reviews. if you’re choosing between the two, it’s fairly easy to decide which is best. You just need to know what the key differences are.

Smart Air Purifier

Levoit Core 300S

Levoit Core 300S
Smart Air Purifier

Levoit Core 400S

Levoit Core 400S

How is the Levoit Core 300S different than the Core 400S?

The most significant difference between the Levoit Core 300S and Levoit Core 400S is that the Core 400S is designed for larger rooms. With this capability comes some tradeoffs. The Core 400S is also bigger, heavier, more energy hungry and slightly louder than the than the 300S.

Room Size and CADR

The big story when it comes to the difference between the 300S and 400S is the size of the room they are designed for: The Core 300S is designed for smaller rooms than the 400S.

  • Core 300S (Levoit): 219 sq. ft.
  • Core 400S (Levoit): 403 sq. ft.

By Levoit’s numbers, the 400S has an effective range of almost double that of the 300S. This really is the most important distinction between the two air purifiers. In their testing and calculations, EnergyStar recommended the 300S for rooms up to 175 sq. ft. and the 400S for up to 378 sq. ft.

RELATED: See which models rose to the top of our Best Air Purifier competition!

As you’d expect, with a different motor, filter and chassis, CADR numbers also vary between the units (see the specifications table below).

Levoit Core 300S smaller than the 400S
The Levoit Core 300S and 400S size grows as does the size of room they work in. © Vacuum Wars

Tip: If you’re at the top of the range for room size with the Core 300S, consider going with the 400S.

Power Consumption

Levoit rates the Core 400S’ motor at 38W compared to the 300S at 26W. While those numbers seem small, it represents a 46% difference from model to model.

Where power is concerned the rated power of the Core 300S model is 26W, significantly less than the Core 300 model at 45W. EnergyStar says that would add up to an estimated annual energy use of 139 kWh/year for the 300S and 234 kWh/year for the 400S.

Noise Levels

Both models have a low 24dB starting point for generated noise. When pushed to their highest fan setting, the 400S is ever so slightly louder at 52dB, just 2dB higher than the 300S. It’s so minute we almost didn’t include it, but it is a difference.


The Core 400S was designed to serve a larger area. To treat more air, Levoit equipped it with a larger filter to do so. This explains it’s larger overall size and weight.

The 400S has a 10.8″ diameter, is 20.5″ tall and weights in at 14.1 lbs. The more compact Core 300S has an 8.7″ diameter, 14.2″ height and weights significantly less at 6.95 lbs.


Purchasing the Core 400S will set you back around 50% more than the Core 300S.

Levoit Core 300S vs 400S

Shared Features and Specifications

There’s a long list of shared features between these two air purifiers.

Activated Carbon Coating - Levoit Filter - Core 300S vs Core 400S
The Core 300S and Core 400S have pieces of activated carbon suspended in their filter. © Vacuum Wars


Both air purifiers come with a 3-stage filter which includes a pre-filter, HEPA filter and VOC filter in one cylindrical unit. VOC filtration comes by way of actual chunks of carbon which are suspended on the inside of the filter.

The shared type and level of filtration means both Levoit air purifiers can handle bacteria, dust, mites, mold, pet dander, pollen, smoke and odors.


There’s several smart air purifier technologies that both air purifiers share. Most notable is the Automatic mode. When set to Auto mode the air purifiers monitor the current condition of the air and adjust airflow accordingly.

This is one of those features that every air purifier (and home) could benefit from as it limits the amount of electricity being consumed to what the current conditions require.

When we compared the Core 300 and Core 300S, lack Automatic mode was a big difference; only the ‘S’ designated models have the capability.

Some shared features:

  • 3-Stage Filtration (Pre-Filter, HEPA Filter, Carbon Filter)
  • Voice Control (Amazon Alexa, Google Assistant)
  • Remote Control and Monitoring (VeSync App)
  • Automatic Mode
  • Timer
  • Display Lock
  • Display Off mode
  • Filter Life Indicator
  • Sleep Mode
  • Color Band Air Quality Indicator
  • Numerical Air Quality Indicator
  • Ozone-free
  • EnergyStar Certified

PM2.5 Air Quality Sensor

When we mentioned Automatic mode earlier we never said how the air purifier could tell what the current air quality level is at any point in time. That’s where the PM2.5 air quality sensor comes in.

This sensor, found in both the 300S and 400S, measures airborne particles as they pass in front of it. Based on what the PM2.5 sensor’s reading is, a small computer adjusts fan speed.

On the top of each air purifier a colored ring and number serve as easy-to-read and understand air quality indicators. The colored ring has four colors: Blue, Green, Orange and Red. Blue means the air is Very Good, Green is Good, Orange indicates Moderate air quality and Red is Bad.

Indicator ColorAir QualityFan (Auto)PM2.5 Range
BlueVery GoodSleep Mode0-35 ug/m3
GreenGoodLow36-75 ug/m3
OrangeModerateMedium76-115 ug/m3
RedBadHigh > 115 ug/m3
Core 300S and 400S air quality, fan mode and PM2.5 range.

Numerically, the higher the number shown the worse the quality of the air.

Current air quality levels can also be seen in the VeSync app.

For Small Rooms

Levoit Core 300S

Levoit Core 300S
For Medium Rooms

Levoit Core 400S

Levoit Core 400S

Which Levoit Air Purifier is Best?

The features these air purifiers share is the same. So, choosing between the Levoit Core 300S and Core 400S isn’t so much which one is best, it’s more about which is the right fit for your home, meaning room size.

Review the maximum area each is effective in treating in the table below, then choose the air purifier which makes the most sense.

Tip: Both air purifiers are easily moved. Consider if you may want an air purifier for a larger space temporarily when choosing which to buy. There’s no harm in running an air purifier designed for a larger space in a smaller one.

Levoit Core 300S vs Core 400S: Specs

Levoit Core 300SLevoit Core 400S
TypeSmart Air PurifierSmart Air Purifier
HEPA filterYesYes
Activated Carbon FilterYesYes
UV FilterNoNo
Ozone EmmissionNoneNone
Fan Speeds33
PM2.5 Particle SensorYesYes
Automatic ModeYesYes
Smart FeaturesYesYes
Room Size (Levoit)219 sq.ft.403 sq.ft.
Room Size *175 sq.ft.378 sq.ft.
Dust-Free CADR *129 CFM247 CFM
Smoke-Free CADR *113 CFM244 CFM
Pollen-Free CADR *134 CFM269 CFM
Dimensions8.7″ x 8.7″ x 14.2″10.8″ x 10.8″ x 20.5″
Weight6.95 lbs.14.12 lbs.
CertificationsCARB, EnergyStar, ETL, FCCCARB, EnergyStar, ETL, FCC
Where to BuyAmazonAmazon
* per EnergyStar

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