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Levoit Core 300 Review

Derek Hales

Written By: Derek Hales

Updated on:

Basic Purifier, Great Performance


Levoit Core 300 Air Purifier

The Levoit Core 300 air purifier is a basic air purifier with 3 fan speeds, a timer, and a sleep mode. It can treat rooms up to 215 sf. in size and had strong performance in our at-home tests. The 300S steps it up with air quality sensors and app connectivity.Buy DirectBuy at Amazon


  • Good for small areas, maxing out coverage around 215 square feet.
  • Lightweight and easy to move to various locations
  • 360° HEPA filtration
  • Auto Mode and real-time air quality monitoring (Core 300S only)


  • No auto mode with the standard Core 300
  • No LED light to display current air quality with the standard Core 300


Purification Test

For performance testing, we set up the Levoit Core 300 in a medium-sized room in my home. We used the Temtop LKC-1000S+ professional air quality detector to get a baseline reading for the existing air quality.

From there, we let the purifier run for an hour and then re-ran measurements.

Levoit Core 300S
Levoit Core 300S

The difference between the baseline and post-run data gives a solid picture of how well the air purifier was able to improve indoor air quality.

Levoit Core 300

Starting Baseline

  • PM2.5: 4.0
  • PM10: 6.7
  • Particles: 214
  • AQI: 16

After 1 Hour

  • PM2.5: 0.4
  • PM10: 0.4
  • Particles: 29
  • AQI: 0

Levoit Core 300S

Starting Baseline

  • PM2.5: 3.7
  • PM10: 5.7
  • Particles: 859
  • AQI: 15

After 1 Hour

  • PM2.5: 0.1
  • PM10: 0.2
  • Particles: 54
  • AQI: 1

Within 1 hour the Levoit Core 300 removed 96% of air particulates from the medium-sized room we tested in (~12’x12′).

The Core 300S removed 94% of air particulates from a medium-sized room we tested in (~14’x10′).

The Core 300 improved PM2.5 air quality by 87% while the 300S improved PM2.5 air quality by 97.3%. Overall, the Core 300 and 300S air purifiers did an exceptional job of purifying the air.

Below, we’ve included information on the testing criteria and what defines good vs. bad air quality.

air quality index - PM 2.5 particulate matter index

In terms of performance, the Levoit Core 300 and 300S were pretty consistent with other results we’ve seen from Levoit. This purifier is compact, budget-friendly, and did a great job of purifying the air.

The Filters

This Levoit Core 300 and 300S uses three stages of filtration for the best performance, including:

  1. Fine pre-filter: captures larger particles like dust, lint, or fibers
  2. HEPA filter: captures particles as small as 0.3 microns
  3. Activated carbon filter: for odors like smoke, food, or pets
360° HEPA filter on the Levoit Core 300 air purifier
Levoit Core 300 HEPA filter

The combination of these filters helps to ensure that all of the air is effectively treated and only clean air passes through.

When it’s time to replace the filters, a filter indicator light on top will glow to let you know.

True HEPA filters stop particles from traveling into clean air
How HEPA filters trap particulates

Noise Test

Additionally, we also tested how loud the air purifier was while running. We perform this test by having the air purifier run on the three different modes and use a sound meter to measure noise level.

The Core 300S was tested from about 3’ away.

Our results showed the following decibel levels from each mode.


17.5 dB


22.0 dB


29.1 dB


41.6 dB

According to the manufacturer, the Levoit Core 300 is slightly quieter than larger Levoit purifiers. For reference, breathing is rated around 10 dB and a library would be around 40 db.

So even on the highest modes the Core 300 / 300s is still extremely quiet.

Levoit Core 300 vs. Core 300s

Here’s a quick side-by-side comparison for the Levoit Core 300 vs. Core 300s.

Levoit Core 300

  • No air quality sensor
  • No auto mode
  • No app connectivity
  • Reduced PM2.5 to 0.4
  • Reduced PM10 to 0.4
  • Weighs 7.5 pounds

Levoit Core 300s

  • Includes air quality sensor
  • Includes an auto mode
  • App connectivity
  • Reduced PM2.5 to 0.1
  • Reduced PM10 to 0.2
  • Weights 5.95 pounds

For most people the extra $30 for the Levoit Core 300s is going to be the better option. It has better performance, more features, and is easier to use. In my view, it’s the obvious choice.

Usability Test

Using the 300 and 300S was simple and straightforward. The Levoit Core 300 and 300S don’t really come with any accessories.

Here is what is included in the box with the 300 and 300S

  • Levoit Core 300 or 300S air purifier
  • True HEPA 3-Stage Original Filter
  • User Manual / Quick Start Guide
all components of the Levoit Core 300 air purifier
Parts of the Levoit Core 300 air purifier

Although they’re not included with the original purchase of the Core 300, Levoit does offer a few accessory filters for various needs. Each filter is modified with features specifically designed for different needs.

Optional Levoit Filters


Levoit Core 300 - Original HEPA filter

Best For: Allergies, dust, and minor odors

Pet Allergy

Levoit Core 300 - Pet Allergy filter

Best For: Pet allergies and strong odors.

Toxin Absorber

Levoit Core 300 - Toxin Absorber filter

Best ForHigh air pollution, smoke, and environmental toxins

Mold & Bacteria

Levoit Core 300 - Mold & Bacteria filter

Best ForMold, bacteria, and musty environments


Setting up the Levoit Core 300 and 300S is simple and intuitive. To get up and running, follow the steps below:

  1. First, unbox the purifier and remove all excess packaging.
  2. To remove the shell from the base, twist it counterclockwise.
  3. Remove the plastic bag of the filter before running the air purifier. 
  4. Twist the shell to lock it back in place.
Unboxing the Levoit Core 300 air purifier
Unboxing the Levoit Core 300 air purifier


All of the controls for this Levoit purifier are located on the top in a circular layout. In the middle is the “on / off” button with various other functions around the circle.

The features include:

  • Timer (2, 4, 6, 8 hours)
  • Sleep mode
  • Adjust fan speed (sleep, low, medium, high)
  • Display lock
  • Filter reset
  • Display off
Controls for Levoit air purifier Core 300
Levoit Core 300 air purifier controls

The Core 300S has all the same features as the 300, with a few extra.

The display also shows rings that indicate the current air quality in the surrounding area.

Levoit Core 300S controls
Levoit Core 300S controls

The Levoit 300 and 300S both have 4 fan speed options to choose from.

  • Sleep
  • Low
  • Normal
  • High

You can manually choose which fan speed you desire for either model. However, the 300S includes an auto mode that uses the internal sensors to best determine which fan speed to use


The Levoit 300S is able to connect to with the VeSync app for controlling the device remotely.

Once the app is connected with the device you can fully control the device from a distance. It has all the same options as the physical controls and more.

Levoit Core 300S
Levoit Core 300S

The app allows the user to set up a custom schedule, which can:

  • Turn on / off
  • Change the fan speed
  • Turn display on / off

Additionally, you can set up Smart Scenes in the app, which allow the user to set up automatic actions based off of custom conditions.

For example: you can set the 300S to turn on automatically if its internal sensors notice a decrease in surrounding air quality.


To keep the air purifier running at its peak performance, proper maintenance is an important step.

With that in mind, here’s a quick checklist of maintenance items for the Levoit Core 300 and 300S air purifiers.

  1. Wipe down the air intake and outlet grills with a dry, lint-free cloth
  2. Replace the filters as needed, every 6-8 months as recommended by the manufacturer
Levoit Core 300 filter - 360° HEPA
Close up of the Levoit Core 300 filter

The Core 300/300S also has a filter indicator on top of the unit which lets you know when it’s time to put in fresh filters.

Because the Core 300S has app connectivity, it will also notify you via the app if the filter needs to be replaced.

Size & Dimensions

The Levoit Core 300 and 300S are the same size and shape. Both are quite compact and ideal for a single bedroom.

size of the Levoit Core 300 air purifier
Levoit Core 300 air purifier size comparison

Unlike larger air purifiers that are designed to sit on the floor, the Levoit Core can be used on the floor, a table, or a desktop.

  • Length: 8.7″
  • Width: 8.7″
  • Height: 14.2″

The Core 300 and 300S are similar in weight as well, although there is a slight difference.

Core 300 Weight

7.50 lbs.

Core 300S Weight

5.95 lbs.

Should you buy the Levoit Core 300 or 300S Air Purifier?

All things considered, is the Levoit Core 300 and 300S air purifier the right choice for you?

These models are compact, lightweight, and a great option for small areas like bedrooms, kitchens, or home offices.

Overall, I would recommend the Levoit Core 300 or 300S if you’re looking for an air purifier with the following features:

  • Compact size: This air purifier is compact and lightweight. If you plan on moving the purifier around to different spaces or if your primary space is under 250 square feet, the Core 300/300S could work well for you.
  • Value priced (Core 300): If you’re looking for a medium coverage air purifier for under $100, the Levoit Core 300 has you covered. This purifier strikes a balance of area coverage, solid performance, and a reasonable price tag.
  • App Connectivity (Core 300S): If you want to be able to control your air purifier remotely, the Core 300S could be the right choice. The app gives you full control of the device wherever you are, and gives you the ability to set up custom schedules.
  • Excellent performance: During our performance tests, the Levoit Core 300 improved the indoor air quality, reducing the particulate count by 96% and improving the PM2.5 value by 87%. The Core 300S also performed well reducing the particulate count by 93.7% and improving the PM2.5 by 97.3%.

For more information or the buy the Levoit Core 300 air purifier, click here.

Budget-Friendly, Compact Design
  • Design - 94%
  • Performance - 97%
  • Quality - 94%
  • Usability - 95%
  • Value - 96%


The Levoit Core 300 air purifier is an excellent small to mid-size air purifier with a simple design and user interface. It has a 360° HEPA filter that maximizes air input and output to help cover more area faster. There are 4 modes on this purifier; high, medium, low, and sleep. The Core 300S has wifi connectivity and an “Auto Mode”, which senses the current indoor air quality and adjusts the fan speed appropriately.

About Derek Hales

Derek HalesDerek Hales is the Founder and Editor-in-Chief of He has been featured in Fast Company, Reader's Digest, Business Insider,, She Knows, and other major publications. Derek has a Bachelor's Degree in Business Administration from Kansas State University. Hales has been testing and reviewing products for the home since 2014.

Need Help? Ask Your Question Below.

13 Comments on “Levoit Core 300 Review”

  1. Hi,
    Thanks for the great review. Is really appreciated. I’ve got the 300s and I am pretty happy with it. However, I recently got a humidifier to help ( currently max 40% humidity in the appartement) and the Levoit goes nuts ( red- over 200 particles) when I put the humidifier On. Even if it is in a different room. As soon as I turn off the humidifier the particles count starts going down.
    Is the levoit trying to filter out the water molecules? Would that cause mold in the carbon filter and clog it? And the HEPA filter?
    What would be the safe way to used them together at home?
    Thank you!!

    • You need to use distilled water in your humidifier.

      When you use a humidifier with regular water it throws all of the stuff that was into the water up into the air…so hardware, chemicals, disinfection byproducts, and more. So Levoit recognizes there are particulates in the air and is doing its best to remove them.

  2. Just a friendly FYI–your referral link to the 300 on Amazon goes to the 300, but your 300S link also goes to the 300.

    • Thanks! I’ll take a look at it.

      Levoit keeps changing their products offered in these URLs. But I’ll get it changed back.

  3. Hey,
    Thank you for reviewing the same, really appriciate your efforts for donig this and helping us out.
    My questions is – Can you please help with energy consumption for both model 300s vs 300 core.
    THank You,
    Santosh K.

    • i find test from any user on amazon:

      Core 300: Sleep: 15.8W – Level 1: 18.0W – Level 2: 22.0W – Level 3: 32.3W
      Core 300s: Sleep: 3.6W – Level 1: 5.6W – Level 2: 9.6W – Level 3: 14.8W

  4. Thank you for your reviews, very helpful. I just purchased the Levoit core 200s series. I am asthmatic and my upstairs’ neighbors smoke. The smoke is greatly affecting me and they deny smoking, so I purchased the above mentioned purifier. My question is: Is the Levoit core 200s I purchased enough for my bedroom 14×12 Sq-ft or should I purchase the 300 series? Even if more expensive, my situation leaves me with no choice. Also, although my bedroom is 14×12, there is a small hallway 3×5 out of the bedroom to the door of the bedroom. Should that area be added to the total square footage?

    Thank you,


    • I would definitely get the 300 over the 200, especially if you’re dealing with any level of smoke.

  5. Being that the Levoit core 300 lacks the auto mode and air quality detector, is Winix a230/231 a good alternative, if not which is? How does it compare to Levoit core 300 performance and noise wise? and lastly do you how reliable it would be to get the Smartmi p1, as far as getting access to filters and warranty?

    • Regarding how Levoit compares to Winix, I don’t know. We haven’t tested Winix yet. Winix is a well known and generally well-thought of brand, so I expect Winix would be just as good and arguably better along some attributes.

      Regarding the Smartmi P1. I would think filters and warranty aren’t going to be an issue. Smartmi is the sister brand of Airdog, which has a longer and more established history. I don’t think there’s any reason to think there won’t be a steady supply of filters and warranty support moving forward.