The Levoit Core 300S is an entry-level, compact air purifier that effectively replaces the older Levoit Core 300 in Levoit's lineup. It builds on the same compact design and three-stage filtration system while adding a range of modern convenience features, including an air quality sensor for automatic operation, voice control support, and integration with the VeSync smartphone app for remote monitoring and scheduling. It also features a different motor that draws less power than its predecessor.
Our Verdict
The Levoit Core 300S is a decent choice for pet owners. It helps keep pet dander and other airborne particles under control in smaller rooms like bedrooms and living rooms, or in a home office where your pet spends much of the day at your feet. That said, its relatively modest airflow means it works more gradually than stronger performers, particularly in larger spaces. Its quiet operation is a plus for noise-sensitive cats and dogs, and features like automatic fan adjustment, app control, and remote scheduling make it easy to keep running throughout the day, even when you're away from home.
- Wide assortment of convenience features.
Low noise levels make it easy to run throughout the day or overnight without being overly disruptive.
Takes longer to clean the air than stronger performers, especially in larger rooms.
Using lower, quieter fan speed settings noticeably slows particle filtration.
The Levoit Core 300S is a good choice for bedrooms. It runs quietly, even at higher fan speeds, so it's less likely to disturb your sleep if you need extra airflow overnight. It's dedicated Night mode turns off the display lights, and its compact size makes it easy to fit on a nightstand, dresser, or shelf, even in the smallest of bedrooms. Smart features like app control, scheduling, and voice assistant support also make it easy to adjust settings without getting out of bed. However, it isn't especially quick at cleaning the air, so larger bedrooms may take longer to see a noticeable improvement in air quality.
- Wide assortment of convenience features.
Small enough to fit comfortably on a nightstand, dresser, or shelf, even in smaller bedrooms.
Night mode turns off the display lights, making it less distracting when you're trying to sleep.
Low noise levels make it easy to run throughout the day or overnight without being overly disruptive.
Takes longer to clean the air than stronger performers, especially in larger rooms.
Using lower, quieter fan speed settings noticeably slows particle filtration.
The Levoit Core 300S has an adequate particle filtration rate, making it well-suited for small to medium spaces like bedrooms, home offices, and dorm rooms, where it keeps everyday airborne particles comfortably in check. That said, its clean air delivery rate (CADR) is modest, so expect longer run times before noticing a meaningful improvement after cooking, cleaning, or a stretch of poor outdoor air quality. Larger rooms will feel this limitation most, especially when you need the air cleaned quickly.
- Wide assortment of convenience features.
Low noise levels make it easy to run throughout the day or overnight without being overly disruptive.
Takes longer to clean the air than stronger performers, especially in larger rooms.
Using lower, quieter fan speed settings noticeably slows particle filtration.
- Wide assortment of convenience features.
Low noise levels make it easy to run throughout the day or overnight without being overly disruptive.
Takes longer to clean the air than stronger performers, especially in larger rooms.
Using lower, quieter fan speed settings noticeably slows particle filtration.
Changelog
- Updated Jun 18, 2026: We've updated this review to Test Bench 1.3, which adds a new 'Footprint' test that's meant to score an air purifier's dimensions. If you're interested in learning more about why we made this change, read our changelog article.
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Updated Jun 05, 2026:
We added a link to the newly reviewed Blueair Blue Pure 511i Max in the Noise section of the review for users seeking an even quieter alternative.
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Updated Jun 03, 2026:
We've updated the review text to place a greater emphasis on user experience and incorporated findings from our Test Bench 1.2 Low-Noise Particle Filtration Rate test.
- Updated May 01, 2026: We've updated this review to version 1.2 of our test bench. This new methodology adds the new Low-Noise Particle Filtration Rate test, which measures particle filtration performance when the device is configured to run at a standard operating volume below 45 dBA. If you're interested in seeing more about the changes made to this test bench, see our changelog.
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Differences Between Sizes And Variants
The Levoit Core 300S is only available in one color, 'White.' You can see the label of the unit we tested.
Let us know in the comments if you come across another variant of this air purifier.
Popular Air Purifier Comparisons
The Levoit Core 300S is a compact air purifier aimed at small to medium-sized rooms, and it replaces the older Core 300 with a meaningful set of upgrades: a built-in air quality sensor, app connectivity, and fully automatic operation. Convenience features like voice command support, remote scheduling, and automatic fan adjustment based on real-time air quality readings make it easy to work into a daily routine without much ongoing attention. Within Levoit's lineup, it sits below the larger Core 400S, trading some airflow capacity and room coverage for a smaller footprint that's easier to place in bedrooms and home offices. That compact cylindrical design also gives it a practical edge over similarly featured alternatives like the Winix C545, making it easier to tuck into tight spaces like a crowded desk, a narrow nightstand, or a bedroom dresser.
If you're interested in alternatives, check out our recommendations for the best air purifiers, the best air purifiers for pets, and the best air purifiers for bedrooms.
The Levoit Vital 200S is the better air purifier for most people over the Levoit Core 300S. Both air purifiers share many of the same conveniences, including app connectivity, automatic fan adjustment, air quality monitoring, and voice control, but the Vital 200S delivers noticeably stronger air-cleaning performance and handles medium-sized rooms with more confidence. Its higher airflow lets it maintain air quality more effectively in larger bedrooms, living rooms, and open-concept spaces where the Core 300S can start to struggle. It also comes with a washable pre-filter and a U-shaped air inlet designed to resist pet hair clogs, which makes it a particularly good fit for pet owners. The Core 300S's main edge is its much smaller footprint, making it easier to place on a nightstand, shelf, or dresser in tighter spaces where the Vital 200S might feel a bit bulky.
On paper, the Levoit Core 300S is a straightforward evolution of the standard Levoit Core 300, retaining a similar compact design and overall air-cleaning performance while adding an air quality sensor, Wi-Fi connectivity, automatic fan speed adjustment, and full remote operation through its VeSync companion app. The 300S also uses a different motor that draws less power than the one found in the older Core 300. As a result, the newer model focuses more on convenience, automation, and energy efficiency than on delivering a significant increase in air-cleaning performance. For most users, the biggest differences between the two models will be the addition of smart features and fully automatic operation rather than any meaningful change in filtration capability.
If the Levoit Core 300S feels a little too small for your needs, the Levoit Core 400S is the natural next step. Both purifiers share a similar set of convenience features, including app connectivity, voice control, automatic fan adjustment, and remote scheduling, but the 400S delivers substantially stronger air-cleaning performance thanks to its larger size and more powerful motor. That makes it a much better fit for larger bedrooms, living rooms, and open-concept spaces where the 300S can start to struggle. The tradeoff is a considerably larger footprint and a higher price tag, which is what makes the 300S the more practical choice when the smaller size is actually an advantage.
The Dyson HushJet and the Levoit Core 300S are compact air purifiers intended for smaller spaces, and they perform very similarly overall. Get the Levoit if you want similar performance in a more budget-friendly package, along with a more hands-on user experience thanks to its larger interface and more accessible onboard controls. Both units feature a cylindrical design with 360-degree filters, and both support app connectivity, though the Levoit uses a three-stage filtration system while the Dyson uses a simpler two-stage setup. If quieter operation is a priority, the HushJet is worth considering over the Levoit. Ultimately, both are best suited for smaller rooms and can struggle to clean the air quickly in larger or open spaces.
Test Results
The ring of lights around the power button on the Levoit 300s serves as a built-in air quality indicator, changing color based on readings from the unit's onboard air quality sensor:
- Blue: Very good
- Green: Good
- Yellow: Moderate
- Red: Bad
The onboard controls provide access to all core functions, including fan speed adjustment, Sleep mode, timer settings, display brightness controls, and Auto mode, which automatically adjusts fan speed in response to changes in air quality. While there's no dedicated remote control, the air purifier supports full app connectivity through the VeSync app, allowing you to monitor air quality, adjust settings, create schedules, and control the unit remotely through your smartphone. The display lights can be turned off entirely using Sleep mode or the Display Off function, making the air purifier less distracting for overnight use in bedrooms. A filter replacement indicator is also included to let you know when it's time to install a new filter.
The Levoit Core 300S has a three-stage filter system comprised of a pre-filter, a primary filter stage, and a High-Efficiency Activated Carbon filter. You'll only need to clean the pre-filter with a soft-bristle dusting brush or a vacuum periodically, but make sure not to damage any other parts of the filter system when doing so.
The filter assembly should be replaced every six to eight months. Replacement filter assemblies are available through Levoit.
The manufacturer also offers several specialty filter options designed for different needs:
4-Stage Smoke Remover Filter: Levoit advertises this filter as providing enhanced protection against dust, smoke particles, pollen, and pet dander. More information about the Smoke Remover replacement filter can be found on Levoit's website.
3-Stage Toxin Absorber Filter: According to Levoit, this filter is intended to help reduce odors from smoke and smog, along with volatile organic compounds (VOCs) emitted by sources such as cigarettes, cleaning products, paint, and glue. Toxin Absorber replacement filters are also available from Levoit.
3-Stage Pet Allergy Filter: This filter is designed to better capture pet dander and help reduce pet odors. You can learn more about the Pet Allergy replacement filter on Levoit's website.
This unit's maximum clean air delivery rate (CADR) is adequate. At its highest fan speed, the Core 300S is best suited for small to medium-sized rooms like bedrooms, home offices, and apartments, where it can maintain good air quality during everyday use. However, it isn't especially quick at cleaning the air, so it may take a while before you notice a meaningful improvement when particle levels are elevated after cooking, cleaning, or a period of poor outdoor air quality. Larger rooms will also take longer to fully cycle the air, especially when particle levels are elevated.
The low-noise particle filtration rate is adequate, though airflow is fairly limited at quieter fan settings. That makes it best suited for smaller bedrooms, nurseries, or home offices where it can run continuously without becoming disruptive. For medium-sized rooms or spaces with higher particle levels, you'll need to increase the fan speed, which results in noticeably faster air cleaning but at the cost of higher operating noise.
This air purifier delivers excellent noise performance. At its lowest settings, operating noise is practically unnoticeable, blending into the background of a quiet bedroom and making it easy to run overnight without disturbing sleep. Even at its highest fan speed, it only reaches noise levels comparable to a normal conversation. While you'll certainly notice it running at full power, it's unlikely to overwhelm nearby TV audio or become excessively distracting in most bedrooms, offices, or living spaces.
If minimizing noise is your top priority, however, the Blueair Blue Pure 511i Max is worth considering, as it remains even quieter across its fan range while still delivering comparable air-cleaning performance.