Levoit · Smart bedroom
Levoit Core 300S
The Core 300 with a sensor: the same compact HEPA cylinder, plus a laser PM2.5 sensor, auto mode and app or voice control.
- Laser PM2.5 sensor and auto mode
- VeSync app, Alexa and Google
$149.99at levoit.com · Nov 2026
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- smoke CADR: clean air it moves each minute
- 141 cfm
- room size it suits, every day
- 20 m²
- 219 ft²
- room size on smoggy days
- 13 m²
- 141 ft²
Levoit Core 300S at a glance
- Smoke CADR
- 141 cfm (AHAM)
- Filter
- Pre-filter, HEPA and activated carbon in one cylinder
- Replacement filter
- Core 300-RF, the same as the Core 300 (Levoit: every 6–8 months)
- Sensor
- Laser particle sensor; auto mode follows it
- Smart features
- VeSync app, Alexa, Google Assistant, schedules
- Noise (maker)
- From 22 dB in sleep mode
Which rooms it suits
Everyday: AHAM's room size. Smog: AHAM's advice for smoke, a CADR at least equal to the floor area in ft².
| Room | Everyday | Smog days |
|---|---|---|
| Bedroom · 15 m² (161 ft²) | ||
| Living room · 30 m² (323 ft²) | ||
| Large room · 50 m² (538 ft²) |
Our take
The Core 300S is what most people mean when they recommend a Levoit for a bedroom. It cleans exactly as the Core 300 does, with a smoke CADR of 141 cfm for a room of about 20 m², and adds the one thing the Core 300 lacks: a sensor. In auto mode the fan rises when the PM2.5 does, and the app shows the reading and the filter's life.
It takes the same Core 300-RF filter as the Core 300, which keeps running costs low and replacements easy to find.
What's good
- Auto mode with a laser particle sensor
- Sleep mode from 22 dB
- Low-cost filter, easy to find
What's not
- About 20 m²: too small for a big bedroom
- Costs more than the Core 300 for the same clean air
Its filter: Levoit Core 300 & 300S Replacement Filter · $29.99 at levoit.com
Good for
- Bedrooms and studies up to about 20 m²
- Anyone who wants it to react to the air on its own
Skip it if
- You don't want an app: the Core 300 cleans the same and costs less
- The room is bigger than about 20 m²
How it compares
Every air purifier in the shop.
| Product | Best for | Smoke CADR | Room size | Price |
|---|---|---|---|---|
| Levoit Core 300S (this one) | Smart bedroom | 141 cfm | 20 m² | $149.99 |
| Levoit Core 300 | Budget bedroom | 143 cfm | 21 m² | $89.99 |
| Levoit Vital 100S | Pet-friendly bedroom | 143 cfm | 21 m² | $119.99 |
| Coway Airmega 150 | Small & quiet | 153 cfm | 22 m² | $189.99 |
| Levoit Core 400S | Shows PM2.5 | 231 cfm | 33 m² | $189.99 |
| Winix C545 | Everyday pick | 232 cfm | 33 m² | $209.99 |
| Coway Airmega AP-1512HH Mighty | Best overall | 233 cfm | 34 m² | $239.99 |
| Coway Airmega AP-1512HHS (Mighty with Wi-Fi) | Smart Mighty | 233 cfm | 34 m² | $299.99 |
| Coway Airmega 200M | Mighty's twin | 233 cfm | 34 m² | $229.99 |
| Levoit Vital 200S | Pet homes | 250 cfm | 36 m² | $169.99 |
| Honeywell HPA300 | No-frills power | 300 cfm | 43 m² | $269.95 |
| Coway Airmega 400 | Big rooms | 376 cfm | 54 m² | $649.00 |
| Levoit Core 600S | Large rooms | 391 cfm | 56 m² | $299.99 |
| Blueair Blue Pure 211i Max | Most clean air | 435 cfm | 63 m² | $349.99 |
| Filtrete MPR 1900 MERV 13 filters for a DIY box-fan purifier (4-pack) | Budget build | — | — | $87.99 |
Its filter, and related models
Levoit Core 300-RF Original FilterCore 300 & 300S · $29.99
Levoit Core 300Budget bedroom · $89.99
In our buying guides
Questions about the Core 300S
- What size room does the Levoit Core 300S cover?
- About 219 ft² (20 m²). That's AHAM's room size for its smoke CADR of 141 cfm: the floor area, with an 8 ft ceiling, whose air it cleans about every 12.5 minutes.
- Is the Levoit Core 300S enough for smog?
- For smoke and heavy smog AHAM suggests a smoke CADR at least equal to the floor area in square feet. By that measure the Levoit Core 300S keeps up with a room of about 141 ft² (13 m²). Keep the windows shut and run it on high while the AQI is bad.
- Core 300S or Core 300?
- The same filter and the same clean air (about 141–143 cfm smoke CADR). The 300S adds a laser PM2.5 sensor, auto mode and app control for about $50 more at Levoit's list prices.
- Does the Levoit Core 300S detect smells?
- No. Its sensor reads particles, not odours, so for cooking smells or smoke you can't see, set the fan to high yourself; the carbon layer does the work.
How we judge. We haven't tested the Core 300S in a lab of our own. The figures come from independent ratings (AHAM, Energy Star, NIOSH, the ASPCA) or the maker, and the verdict is ours, from those figures. No brand pays to be listed. Last checked Nov 7, 2026.
Levoit Core 300S
$149.99 list price