The Levoit Core 300 is a basic air purifier with a three-stage filtration system. Its compact size and relatively inexpensive price point make it a compelling option if you want to purchase several units to set up in multiple rooms within your home. However, it lacks niceties like an air quality sensor for fully autonomous, set-and-forget usage.
Our Verdict
The Levoit Core 300 air purifier is decent for pet owners. The air purifier's standard filter does a satisfactory job of trapping the smallest airborne particles, like those from cat dander. However, a more specialized 3-Stage Pet Allergy Filter is available from the manufacturer. Its air cleaning rate is also fairly good, especially for such a compact machine, though you might want to buy more than one for especially large homes. It also isn't too loud, even at its highest fan speed, which is great if your pet is particularly sensitive to loud noises.
Reasonably quiet overall operation.
CADR is sufficient for bedrooms and offices.
- No air quality sensor for fully autonomous operation.
Will struggle to operate effectively in especially large areas.
The Levoit 300 is a good option for bedrooms. Its compact size makes it easy to set up wherever you may need it within your room. It also features a separate 'Night' mode setting that reduces the fan speed and, therefore, operating noise to a low murmur. Unfortunately, using this setting has a significant adverse impact on overall filtration performance, which is otherwise quite decent at its highest fan speed. The air purifier also has a display shutoff, so you won't have to contend with any bright lights shining in the periphery of your vision while trying to get some rest.
Reasonably quiet overall operation.
- Compact size.
CADR is sufficient for bedrooms and offices.
- No air quality sensor for fully autonomous operation.
Will struggle to operate effectively in especially large areas.
The Levoit Core 300's particle filtration rate is okay. It's fine for use in bedrooms or offices, and potentially smaller living rooms and dining areas, but it's simply undersized and underpowered for use in areas bigger than that if used as a single unit.
Reasonably quiet overall operation.
CADR is sufficient for bedrooms and offices.
Will struggle to operate effectively in especially large areas.
Changelog
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Updated Feb 11, 2026:
We've updated the text in this review to reflect new tests added with version 1.1 of our test bench.
- Updated Feb 11, 2026: Version 1.1 of our air purifier testing methodology provides a more representative summary of unit performance, with a revised Particle Filtration Rate test conducted in a better-sealed environment and a more reliable means of generating consistently sized particulate matter. We've also included a parameter for the machine's maximum recommended room size. For a more detailed breakdown of the changes made, see our full changelog.
- Updated Nov 04, 2025: Version 1.0.2 of our Air Purifier Test Bench rectifies calculation errors in our existing Particle Filtration Rate test to provide more representative results of some units. For a more detailed breakdown of the changes made, see our full changelog.
- Updated Oct 31, 2024: Converted to Test Bench 1.0.1.
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Differences Between Sizes And Variants
There are two variants of this air purifier. We tested the Core 300 model in 'White', and you can see its label.
| Model Name | Installed Filter | Available Colors | Notes |
|---|---|---|---|
| Core 300 | Core 300 Original Filter | Black, White | |
| Core P350 | 3-Stage Pet Allergy Filter | Gray | Features a 12-hour timer instead of an 8-hour timer. Also has a control lockout function. |
Let us know in the comments if you come across another variant of this air purifier.
Popular Air Purifier Comparisons
This is a basic air purifier. The Levoit Core 300's compact design, relatively quiet operation, and impressive particle filtration performance make it an ideal fit for smaller dwellings. That said, if you're looking for the last word in terms of a hands-off user experience, you'll want to spend more on an alternative with an air quality sensor and smartphone app integration.
On paper, the Levoit Core 300S should be a straightforward upgrade of the standard Levoit Core 300, delivering the same performance with the addition of a particle sensor and Wi-Fi connectivity, allowing for automatic fan speed adjustment and full remote operation through its VeSync companion app. In reality however, things are a little more complicated; the 300S features a power-optimized motor that draws less power than the one in the older 300. While this would seem to be a net benefit, this actually results in a vastly lower clean air delivery rate.
The Levoit Core 300 and Levoit Core 200S each have their own advantages. The Core 300 is the bigger, more powerful machine that's a little more efficient in larger spaces. Meanwhile, only the Core 200S has Wi-Fi connectivity, allowing you to make remote settings adjustments or set operating schedules.
Test Results
This device has a three-stage filter system comprised of a pre-filter, a primary filter layer, 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.
You'll need to replace this filter assembly every six to eight months, and you can find a replacement here.
The manufacturer also offers several replacement filters intended for more specific kinds of particles:
- 4-Stage Smoke Remover Filter: The manufacturer advertises this filter to provide additional protection against dust, smoke particles, pollen, and pet dander. You can buy this filter here.
- 3-Stage Toxin Absorber: The manufacturer advertises this filter for reducing odors from smoke and smog, as well as volatile organic compounds (VOCs) emitted by cigarettes, cleaning products, and paint and glue. You can buy this filter here.
- 3-Stage Pet Allergy Filter: This filter is designed to better trap pet dander and reduce pet odors. You can buy this filter here.
The Levoit Core 300's maximum particle filtration rate is acceptable. You'll be forced to run it at its highest fan speed in larger areas, where it will struggle to capture airborne contaminants in a time-efficient manner. It's best suited for use in more modestly sized bedrooms and offices.
This is an impressively quiet air purifier overall. Its lowest fan speed produces low noise unlikely to keep you up at night if it's set up close to your bed. At the highest of its fan speeds, operating noise is noticeable but not necessarily catastrophic; if it's positioned in an office or living room, you might have to turn up your TV by a notch or two, but not much more than that.