Levoit Core 300S
(11 reviews)
Compact and connected, the Levoit Core 300S filters your bedroom's air with a true HEPA H13 filter and adjusts its own speed thanks to its air quality sensor.
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Key features
- Filtration: 3 stages: pre-filter, HEPA H13, activated carbon
- Air flow (CADR): 240 m³/h, up to 50 m² recommended
- Noise level: 22 dB in sleep mode
- AirSight sensor: adjusts fan speed to the real air quality
In detail: Levoit Core 300S
The Levoit Core 300S is a compact air purifier built for bedrooms, home offices and medium-sized living rooms. It belongs to Levoit's Core line, a reference on the entry-to-mid-range connected air purifier segment, and reuses the VortexAir technology already found on the original Core 300 to circulate air more efficiently.
Filtration happens in three stages: a pre-filter that catches the largest particles (hair, lint), a genuine HEPA H13 filter able to capture 99.97% of particles down to 0.3 microns (pollen, dust mites, fine particles), then an activated carbon filter that absorbs cooking, smoke and pet odours. With a purified air flow (CADR) of 240 m³/h, Levoit recommends a coverage of up to 50 m², comfortably covering a standard bedroom or living room.
What sets the Core 300S apart from the plain Core 300 is its AirSight laser sensor, which measures fine particle levels (PM2.5) in real time and shows the air quality as a four-colour light ring. In auto mode, fan speed then adjusts on its own, no input needed. The unit can also be controlled from the VeSync app (scheduling, timer, filter-life tracking) or by voice through Amazon Alexa and Google Assistant.
On the comfort side, sleep mode drops to 22 dB, close to silent, with the display lights switching off automatically so they do not disturb sleep. Power draw stays modest too, just 23 W even on maximum speed run continuously, keeping its impact on the electricity bill in check. The compact housing (22 x 22 x 36 cm, 2.7 kg) slots easily onto the floor or a low shelf.
Its main limitation lies in upkeep: the HEPA H13 filter cannot be washed and needs full replacement roughly every 6 to 8 months, a recurring cost worth budgeting for. Noise also becomes more noticeable on maximum speed. Those caveats aside, the Core 300S remains one of the best-balanced connected purifiers in its price range, recognised with a Red Dot Design Award in 2021, striking a good balance between filtration performance, night-time quiet and everyday ease of use.
Technical data
Detailed characteristics
Additional information
| Brand | Levoit |
|---|---|
| Model | Core 300S |
| Type | Air purifier |
| Filtration | 3 stages: pre-filter, HEPA H13 filter, activated carbon filter |
| Purified air flow (CADR) | 240 m³/h |
| Recommended coverage | Up to 50 m² |
| Air quality sensor | AirSight laser sensor (PM2.5), 4-colour indicator ring |
| Auto mode | Yes, fan speed adjusts to the measured air quality |
| Noise level | 22 dB in sleep mode, up to about 50 dB on maximum speed |
| Power | 23 W on maximum speed |
| Connectivity | Wi-Fi, VeSync app, compatible with Amazon Alexa and Google Assistant |
| Dimensions | 22 x 22 x 36 cm |
| Weight | 2.7 kg |
| Replacement filter | Core 300-RF, replace every 6 to 8 months |
| Certifications | CARB, CE, ETL, Energy Star, RoHS, ECARF |
| Manufacturer warranty | 2 years |
User manual / instructions (PDF)
Comparison
Around £130 to £150, the Levoit Core 300S regularly comes up against the Xiaomi Smart Air Purifier 4 and the Philips Series 800 in searches like "Levoit Core 300S vs Xiaomi" or "Levoit vs Philips air purifier". Here is how the three compare, based on each manufacturer's published specifications.
| Criterion | Levoit Core 300S | Xiaomi Smart Air Purifier 4 | Philips Series 800 |
|---|---|---|---|
| Air flow (CADR) | 240 m³/h | 400 m³/h | 190 m³/h |
| Recommended coverage | Up to 50 m² | Up to 48 m² | Up to 48 m² |
| Filtration | HEPA H13 + activated carbon, 3 stages | Electrostatic + mechanical, no certified HEPA | NanoProtect HEPA + pre-filter, 2 stages |
| Sensor / auto mode | AirSight laser sensor (PM2.5), auto mode | Particle sensor, auto mode | Built-in sensor, auto mode |
| Noise level | 22 dB in sleep mode | Up to 64 dB on maximum speed | 19 dB in sleep mode |
| Connectivity | Wi-Fi, VeSync app, Alexa and Google Assistant | Wi-Fi, Xiaomi Home app | None (non-connected model) |
The Xiaomi Smart Air Purifier 4 offers a higher air flow for a budget that is often tighter, but with less thorough filtration (no certified true HEPA) and a higher noise level at maximum speed. The Philips Series 800 is very quiet and well filtered, but remains a non-connected unit, with no displayed sensor readout or remote control. The Core 300S sits at a sweet spot: solid HEPA H13 filtration, a real-time air quality sensor and full control via app or voice command, for everyday use in a bedroom or home office.
Related video
Video: Levoit Core 300S Smart Air Purifier - Hands-on Review (+ Smoke Test) - Published on 3 June 2023
Our tester's verdict: Christophe Delpuech
I ran the Core 300S in a bedroom of about 16 m² for several weeks, sitting on the floor near the bed. First impression: it is genuinely unobtrusive, both in size, barely taller than a small bin, and in noise, close to inaudible overnight on sleep mode. The AirSight sensor does its job without any thought needed: open a window onto a busy street or cook with the door open, and the light ring turns orange while the fan speed climbs on its own, then settles back down within minutes. The VeSync app is easy to pick up, with a timer and a filter-life tracker that is genuinely useful so you do not forget to replace it. Over the weeks, two real drawbacks stood out: the HEPA H13 filter cannot be washed and gets pricey to replace if you stick to the recommended interval, and at maximum speed the fan noise becomes noticeably more present, best kept for occasional bursts rather than continuous use. For a medium-sized bedroom or home office, it still stands out as one of the best-balanced purifiers in its price bracket.
Frequently asked questions: Levoit Core 300S
Levoit recommends the Core 300S for a coverage of up to 50 m², which suits a medium-sized bedroom, home office or living room. For a larger room, a model with a higher air flow (CADR) is a better fit, such as the Core 400S from the same line-up.
No, the HEPA H13 filter cannot be washed: it traps fine particles deep within its layers and needs full replacement, generally every 6 to 8 months depending on use. Only the outer pre-filter can be vacuumed clean between replacements.
It is a laser sensor that measures the concentration of fine particles (PM2.5) in the air in real time. It displays the result as a coloured light ring and, in auto mode, adjusts fan speed on its own to clean the air faster.
Yes, basic settings (speed, timer, child lock) remain accessible directly from the unit's touch panel. The VeSync app adds remote scheduling, air quality tracking and voice control through Alexa or Google Assistant.
The Core 300S keeps the same three-stage filtration as the Core 300, but adds an air quality sensor, an auto mode, Wi-Fi connectivity and control via app or voice command, usually at a higher price.
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Page published on 4 August 2026