Levoit Core 400S: Specs, Price, Pros & Cons
Two versions of the Core 400S have been sold, and the one in shops today carries a '-P' suffix and a fresh set of AHAM-verified figures. The figures here belong to the current revision, so older reviews quoting a larger room describe the earlier machine.
It is the middle of three in Levoit's connected Core range. The 300S below it is sized for bedrooms, the 600S above it for open-plan floors, and the 400S takes the room between them: a family living room of ordinary size, or a large bedroom with a desk in it. It moves clearly more air than that bedroom model, and its power draw is modest for that output.
The design is Levoit's familiar cylinder, built around a three-stage filter of pre-filter, HEPA-grade media and activated carbon, and a PM2.5 sensor with a colored ring runs the auto mode. Levoit's VeSync app adds schedules and an air-quality history, and Alexa and Google Assistant can switch it on by voice. The ring also gives a reading of the room from across it, with no need to open the app.
Some of the trade-offs come with the current revision. The True HEPA wording has gone from Levoit's paperwork, the pre-filter is part of the cartridge and cannot be washed, and the cartridge is rated for well under a year, so a year of use means buying more than one. The purifier also stands tall and wide enough to need its own patch of floor, which rules out a shelf or a windowsill. It is the size Levoit meant for the main room of a family house, as long as no open-plan kitchen is attached.
Category strengths
Where the Levoit Core 400S beats the median
- A higher CADR (smoke) ?231 CFM vs 161 CFM (median)
- A lower power consumption ?38 W vs 45 W (median)
- A slightly higher coverage area ?358 sq ft vs 354 sq ft (median)
Where the Levoit Core 400S trails the median
- No true HEPA filter ?
- No washable pre-filter ?
- A lower filter life ?7 months vs 12 months (median)
- A heavier build ?6.5 kg vs 5.26 kg (median)
- A slightly higher min noise level ?24 dB vs 23 dB (median)
How this VS Score was computed
Score 47: each known spec is measured against the median of all air purifiers (41 products), then weighted; 50 means level with that median. In classes of six or more, a value beyond the class’s 10th–90th percentile range counts as that limit, so one extreme product cannot set the scale. 77% of the scoreable weight could be used; unknown values, features not applicable to this class and proxies (battery capacity where a rated life exists) add or remove nothing.
| Specification | This product | Cohort median | Score weight | Points moved |
|---|---|---|---|---|
| True HEPA filter | No | 61% of the class have it | 1.5 | −72.0 |
| CADR (smoke) | 231 | 161 | 2 | +44.0 |
| App control | Yes | 70% of the class have it | 0.5 | +25.0 |
| Washable pre-filter | No | 54% of the class have it | 0.5 | −24.0 |
| Filter life | 7 | 12 | 1 | −21.0 |
| Voice assistant | Yes | 64% of the class have it | 0.3 | +15.0 |
| Power consumption | 38 | 45 | 0.5 | +4.5 |
| Min noise level | 24 | 23 | 1.5 | −3.0 |
| Weight | 6.5 | 5.26 | 0.3 | −3.0 |
| Coverage area | 358 | 354 | 2 | +2.0 |
| Air changes per hour | 4.8 | 4.8 | 1 | +0.0 |
| Filtration stages | 3 | 3 | 0.5 | +0.0 |
| Max noise level | 52 | 52 | 0.5 | +0.0 |
Not scored: Activated carbon filter (standard for the class (100% have it)); Sleep mode (standard for the class (95% have it)); Air quality sensor (standard for the class (93% have it)); Auto mode (standard for the class (90% have it)); Filter replacement indicator (standard for the class (97% have it)); Timer (standard for the class (88% have it)).
Editor’s note
Levoit changed this purifier's paperwork without changing its name. The current '-P' revision carries AHAM-verified figures of 231 CFM smoke CADR and 358 square feet at nearly five air changes an hour. The 403-square-foot figure still quoted in older reviews belongs to the first version.
The formula is the one that made this line the category default, and the figures behind it hold up. Its filter cartridge is rated for around seven months. The sleep setting bottoms out at 24 decibels, low enough that overnight running goes unnoticed, and maximum speed reaches 52 dB, which is audible in a quiet room. At 38 watts it is efficient for the airflow, clearly better per CFM than the smaller, older Core 300.
The compromises of the current generation sit on paper and on the floor. Like the rest of Levoit's '-P' line, this revision's spec sheet no longer makes the filter claim that certificate shoppers look for, although the filtration class is unchanged in practice. The body is a 20-inch, six-and-a-half-kilo cylinder, heavy enough that moving it from room to room is a chore rather than a habit.
Within its family, the larger open-plan model moves considerably more air for the next price step and remains the pick for big spaces, and the bedroom model handles small rooms for less. This one is the right middle for a normal living room, and recent street prices have made that middle easier to justify than it was at launch.
It is the sensible default for the most common room in the house.
Specifications
Quality bars show where each figure sits between the lowest and highest of the 41 air purifiers this VS Score is measured against.
Performance
Filtration
Noise & power
Design
Smart features
Sources and verification
Where the specifications come from
- Official product pagelevoit.co.uk
- Independent testingrtings.com
Verification
- First published
- Specifications last checked
- Sheet completeness
- 21 of 22 specifications verified; the rest show as Unknown and are never estimated or scored
- Page type
- Product specification page — Compiled from the manufacturer’s published specifications and the cited sources; this is not a hands-on test.
- Basis
- Research-based: specifications and editorial text were compiled from the documents listed here and the manufacturer’s published data. We have not tested this unit ourselves; where independent measurements are mentioned they belong to the linked publication.
Where to buy
Prices and availability may change. Check the retailer before buying. We may earn a commission on purchases.
Price history
Air Purifiers with similar specs to the Levoit Core 400S
Ratings & reviews
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The bottom line
The Levoit Core 400S earns a VS Score of 47, below the median of the 41 air purifiers it is measured against (a score of 50 is level with that median).
- Who it’s for
- Normal living rooms, with AHAM-verified coverage, a sensor-driven auto mode, app scheduling and a quiet sleep floor in the middle of Levoit's range.
- Who should look elsewhere
- Open-plan spaces, where the next model up moves far more air, and certificate shoppers, because the '-P' revision no longer claims True HEPA.
- The trade-off that matters
- You accept the current revision's quietly reduced paper ratings in exchange for the same platform at friendlier street prices.
- The main alternative
- Levoit Core 600S: the open-plan model, moving far more air for the next step up.
The VS Score is calculated from the weighted specifications above, each measured against the median of comparable air purifiers — a shortlisting guide, not a substitute for your own priorities. See how we score.
